Power Bulb Blue A cell of EMF 2v is connected across a bulb of resistance 100Ω the the current flowing in the circuit is?
a.2A b.0.2A c.0.02A d.0.002A
2.The resistance of the coil which allows 5A current when connected across a 250V potential difference is
a.5Ω b.5x10-power of 1Ω c.50Ω d.5x10-power of 2Ω
3.If the object is placed at infinity from a convex lens then the image formed by the lens will be at
a.infinity b.focus c.centre of curvature d.focus/2
4.If a boy stands in front of a mirror at a distance 2m from the mirror then the distance of image inside the mirror is
a.1m b.2m c.3m d.4m
5.The rear view mirrors used in vehicles is
a.concave mirror b.plane mirror c.convex mirror d.convex lens
6.When white light is made to pass through a prism the the colour which bends more is
a.violet b.red c.blue d.green
7.The lens present in the human eye is
a.concave b.plano concave c.convex d.plano convex
Thanks in advance:)
Are you trying to get us to do your homework?
Well, it won't work, Pal.
OK we can do it, but what will you learn? nothing. You already know how to use the computer and internet, well done! But I think you should spend a bit more time doing your homework yourself...
Description:Flexible and durable LED Bulb Light Strip for boat, RV, auto, truck and aircraft lighting.Made of PVC material, it has 120 LED and give out blue light.This Blue LED Light Strip is easy to bend and shaper for unique design.Low power, energy efficient, virtually no maintenance needed.Flexible Car Light with double side adhesive on the back for easy installation.Waterproof design can be used both external and internal.Suitable for DC 12V power supply.Dimension: ~120(L) x 0.7(W) x 1.3(H)cmWeight: 118gPackage Included:1 x 120 LED Car Light Strip
For healthy light and essential warmth few reptile bulbs offer better long term cost effectiveness than RZilla Halogen. The highintensity output of a halogen bulb is more energy efficient than standard incandescent bulbs lowering electric bills. As an added bonus a halogen bulb s smaller size allows easier use in tight terrarium spaces. Spotlight output directs light and heat for maximum visual drama and reptile comfort. Choose from a full selection to meet specific pet care needs. Halogen delivers more light and heat with less power. Compact design saves space focuses light. One bulb provides both radiant heat and light. Step up to the convenience and cost savings of halogen. 50 Watts. Dimensions: 7.25 L x 5.5 W x 2.75 H. Color: Blue.
For healthy light and essential warmth few reptile bulbs offer better long term cost effectiveness than RZilla Halogen. The highintensity output of a halogen bulb is more energy efficient than standard incandescent bulbs lowering electric bills. As an added bonus a halogen bulb s smaller size allows easier use in tight terrarium spaces. Spotlight output directs light and heat for maximum visual drama and reptile comfort. Choose from a full selection to meet specific pet care needs. Halogen delivers more light and heat with less power. Compact design saves space focuses light. One bulb provides both radiant heat and light. Step up to the convenience and cost savings of halogen. 25 Watts. Dimensions: 7.25 L x 5.5 W x 2.75 H. Color: Blue.
For healthy light and essential warmth few reptile bulbs offer better long term cost effectiveness than RZilla Halogen. The highintensity output of a halogen bulb is more energy efficient than standard incandescent bulbs lowering electric bills. As an added bonus a halogen bulb s smaller size allows easier use in tight terrarium spaces. Spotlight output directs light and heat for maximum visual drama and reptile comfort. Choose from a full selection to meet specific pet care needs. Halogen delivers more light and heat with less power. Compact design saves space focuses light. One bulb provides both radiant heat and light. Step up to the convenience and cost savings of halogen. 75 Watts. Dimensions: 7.25 L x 5.5 W x 2.75 H. Color: Blue.
LEDs are better Light bulbs with high power LEDs provide long life. Light bulbs made with LEDs offer clean pure white light and great colors LED light bulbs are shock and vibration resistant and LED bulbs are direct screwin replacements. This standard household bulb contains 21 LED lights and uses only 3 watts of power. LED lights are energy efficient and use extremely low watts. This will result in money saved by lowered utility costs. The lifespan of this bulb can reach up to 50 000 hours. This bulb emits no UV radiation and will remain cool to the touch. 110V standard E27 base. Standard LED Light A60 with 18 LEDs. 50 Lumens. Available in white warm white cool white red blue green amber and color changing RGB. 120 Volts AC. E27. 2.4 Watts. UL and CE listed. If you want to dress up your interior Lighting while saving energy cost up to 80 reducing heat and extending the life expectancy by over 25 times? Look no further: This is the bulb for you.
The original 6500K daylight and blue actinic lamp built side-by-side. This lamp contains a natural triphosophor full spectrum daylight, and blue actinic for photosynthetic zooxanthellae algae.
piaa h520 & osram h7 hyper white cool blue 5300k 55w & ultra h9 65w power bulbs all on together
Acne Lamps For Blue Light Therapy Under 100 Dollars
Are you troubled with acne and hunting for an inexpensive simple solution? Well blue light therapy may be the solution to your difficulty. This treatment has been established to work and used to only be obtainable at dermatology clinics but now with the development in LED knowledge there are very inexpensive home therapy devices or even pocket devices that an be used whenever your out. Prices range from 50 dollars up to 500 dollars plus for these lamps, but we have investigated and put together a number of affordable acne lamps for blue light therapy priced at under 100 dollars.
How does it work? Well blue light therapy uses UV light to target and kill the bacteria that is related with acne. But you may ask is UV light not bad for my skin? The answer to that question is yes, normal UV light although known to improve acne conditions also causes damage to the skin. The difference with UV used in blue light is the level of UV rays emitted. It has been found that using blue light that has a peak wavelength 415nm out of UV range targets to kill propionibacterium acnes the bacteria associated with acne and produces no harmful rays that damage skin. The FDA approved blue light therapy for acne in August 2002 and studies research has shown that treatment does improve acne in to mild to moderate cases. Blue light treatment lamps only need to be used for around 15 minutes a day to achieve results.
Now you know how blue light therapy works, let us take a look at the value for money acne lamps we have found for you:
1. Acne 415 Blue Light Therapy 38 LED Bulb 415nm. This is not really a lamp but a led bulb with a standard fitting that turns a home stand lamp or anglepoise lamp into an acne therapy lamp.
Simple to use, screw bulb into any 110V or 120V lamp fixture (goose-neck clamp lamp is recommended). Easy & pain free only 15 minute sessions daily. No need to use any other creams or ointments. 30 day money-back guarantee. Less than 50 dollars
2. Acne Blue Red LED Light Therapy 38 LED Bulb for Treatment Acne and Acne Scars 415nm 660nm. Again a bulb like the 38 led blue bulb but this one has the added benefit of red light also. Red light has a peak wavelength 660nm this repairs the damage skin by increasing collagen and regenerating new skin again no harmful rays that cause skin damage.
Easy & pain free only 15 minute sessions daily. Natural acne treatment clears blemishes and heals acne scars 38 super bright therapeutic LED lights, 27 Red LED's 660nm & 11 Blue LED's 415nm Screws into any standard fixture (110v 120v) Guaranteed results within 30 days
3. Viatek DermaBrite Deluxe 4-1 Facial Therapy. This super little device is handbag size giving the advantage of being available for use anywhere. It also uses 4 light technology for not just getting rid of acne but also targets wrinkles, fine lines, age spots, and hyperpigmentation.
15 minute sessions daily Can use multiple colors, to get benefits of 2 UV lights treatments at the same time. Pulse or constant mode control to ensure the correct delivery of light in the right location. Small and compact only 6 x 3 x 9.2 inches; 13.6 ounces Cost between 65 and 100 dollars.
4. Six LED L.T.F.L. Blue 470 NM Light Therapy Device. These are amazing little devices and to look at you could mistake them for a small torch. The manufacture also claims that they as powerful if not even more powerful than their competitors much larger and bulkier units.
Effective but portable low level light therapy devices. Blue 470 NM device helps to destroy bacteria. Blue light emitting diodes engineered for deep penetration. Costs around 45 dollars.
So there you have our affordable acne lamps for blue light therapy for under 100 dollars. If you have been thinking of trying this treatment now is the time, Click the links below for more information and where to buy at the best price.
Blue Led Power Why my labtap toshiba p200 when I press power key not booting just led For power&cd driver are on solid?
I bought my labtap toshiba p-200 equium on 2007 but last night when I press power switch(turn on key)not booting just power led is solid on also cd/DVD driver led is on solid no any activity at all.I press (ALT+cntl+del)and hold it nothing happening I hear fan is working some times.I press and hold power key for 5 sec turn off but when I press on still the same things.I removed battery and disconect it from charger press power key for 2sec.leave it for 4-5 hours but still same led power light is on solid blue and cd driver led light is on orange no flashing at all solid.not any activity.
Dear friends if you know how can I solve this matter and repair my toshiba labtap p200 please let me know what I need to do or buy thanks for your help
Your LAPTOP (not labtap) needs to be taken to a professional for hands-on diagnosis and repair. The symptoms you describe can indicate a wide variety of issues, the only way to determine which one is for a professional to run tests on it.
Description:New generic and interesting Cool Wind Power 2 Blue LED Light Lamp Car Decoration.The Car Decoration Lamp is specifically designed for car decorative lamp.Cool LED Lamp features stylish design with 8 LED bulbs.Wind power, no battery, no wiring required.The strong wind, the bright of the lamp.Easy placing at any part of your car or motor by its strong adhesive2 blue LED lights, add colors to your carPlease use detergent to clean the surface of the target before stick it onMaterial: Solid PVCSize of Blue LED Car Lamp: approx. 12 x 1.5 x 3cmColour: as picture showWeight: 97gPackage included:1 x Wind Power Car Lamp
Description:New generic and interesting Cool Wind Power 2 Red Blue LED Light Lamp Car Decoration.Cool LED Car Lamp features stylish design with blue and red colors.Wind power, no battery, no wiring required.The Car Decorative Lamp is specifically designed for car decorative lamp.The strong wind, the bright of the lamp.Easy placing at any part of your car or motor by its strong adhesive2 red blue LED lights, add colors to your carPlease use detergent to clean the surface of the target before stick it onMaterial: plasticSize of Red Blue Light Lamp: approx. 4 x 2.7 x 2.8cmColour: as picture showWeight: 33gPackage included:2 x Wind Power Car Lamp
Imagine playing your favorite game, breaking a personal best score, and then your PC shuts off. Your power supply probably died! Let this Blue Star 650-Watt ATX Power Supply come to the rescue! With 650-watts of output power and a 115V/230V switchable voltage you'll have the power you need to stay in the game. This Blue Star ESTAR650BLUE-12 features a PCI Express power connector so you can provide power to high end PCI Express video cards and there's even two SATA connectors for providing power to SATA drives!Have a computer case with a clear side window? This Blue Star ESTAR650BLUE-12 has a quiet 5-inch LED Fan that lights up blue adding a cool glow to your case while cooling off valuable components! Be the hit of the your next LAN party! Order your Blue Star 650-Watt ATX Power Supply today!
Description:If your country doesn't allow using the decorative antenna, we'd advise you do not buy it.Made of good quality plastic material and power by wind.When the wind power is enough, the head of the Car Decor Antenna will give out green, red light, but the tail will give out blue light.With LED light, the LED Decor Antenna will warn other vehicle passing by for safe divering.The LED Light Antenna is easy to install as the double-faced adhesive on the base.This Wind Power Antenna for car decoration purpose - not a genuine antenna.Base Size: ~2.3" x 1.5" (L*W)Total height: ~2.4"Color: silver tone & clear whiteWeight: 73.3gPackage Contains:1 x Car LED Decor Antenna
Account limit of 2052 requests per hour exceeded.
Episode 1: Connecting to power in your bass boat - Blue Water LED
Where do I get the power source for my LED lights?
I am adding some led lights to the bottom of my amplifier for my car system. I am mounting the amp and suspending it in the air about 1/4 inches up with some rubber spacers in able to let it cool easier and keep away from vibrations. I assembled some blue led lights under it and tried to run it through the remote wire, the lights turned on...but the amp didnt get enough power to from the remote wire to turn on anymore. So where should I get my power source for the LED's now? The amplifier is running at 2000wrms, which will probably make the led lights go out pretty quick. The led lights are 3.2 (recommended) to 3.8 v (max). All help is appreciated!
Use a multimeter (or test light) to locate a "switched" fuse in the fuse box.
Wire in a switch to control the LED's if desired. Connect a "limiting" resistor to the positive wire.
Use the calculator here to determine the value of resistor needed. Scroll down to "LEDs in parallel" and enter the supply voltage (12V), voltage drop across LED (1.2V), Desired LED Current (3ma), and how many LED's connected (???). Click the "Click to Calculate" button to see the value for a limiting resistor. For example, if you want to power 10 LED's, you'll need a 390 ohm (orange-white-brown), 1 watt resistor.
http://ledz.com/?p=zz.led.resistor.calculator
Connect the cathode (negative) side of your LED's to ground.
White Power Led I need a clear/white LED that will work with 16vac power.?
I am having a hard time finding this do they exist and where can I get them.
All LED's are DC powered - at a minimum, you will need a rectifier and most likely a resister to properly light a LED with the proper DC voltage from your AC supply.
12W White LED Spot Lamp Light With LED Power Supply (85-265V) Model: LV 12-350DAluminum alloy shellUltra bright high intensity LED white lightRated voltage: 85-265V 12X1WSize: 150*150*95 mm
LED Strip Light White 300x SMD 5050 Waterproof with Power Supply Adapter 1 piece=5M
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'Extreme testing' a solar-powered LED light
Luxeon Powered Led Flashlight.?
Single Led for superbright white light and saves battery. Latest technology this technology exist but yet people are still using the conventional bulp type.
And even worse comsumed more energy than anything else. Burns our easily also but people preferred it. why?
More details about Police Luxeon Powered Flashlight at
Description:This High Power Laser Pointer is 100% guaranteed to adopt latest microelectronics Sturdy and Economical technologyLaser Pointer Pen with clip is made of heavy duty metal steel material for much more durable to use.Use it to point at any desired targets, project screens, Lectures, or video monitors, presentations, museum and tour guides, point at the stars, and construction inspection.Simply turn around the cap, see sophisticated green laser technology filling an entire room with thousands of moving starsSimple press the button to activate the Green Laser Pen and release it to deactivate.Metal body with smooth finish - comfortable grip.Green Laser Pointer powered by 2 AAA batteries (not included)Output Mode: Constant WavePower Output: < 30mWWave Length: 532nmSize: ~15.8cm (L) x 1.4cm (D)Weight: 163g
*From the Green Lantern movie. Roleplay as Green Lantern with this mask and Power Ring. *1 Mask & 1 Light up ring *Brand new *Includes 2x 'AG10' (LR54) button cell batteries! Green Lantern Mask & Power Ring Set:In brightest day, in blackest night, no evil shall escape my sight Inspired by the new hit superhero film, Green Lantern. Now you can become a Green Lantern and join the corps with this Green Lantern mask and light-up Power Ring! Put on the mask and raise your ring high in the air so villains will beware your power, Green Lanterns light! Kids will love reenacting the favorite scenes from the movie.
Green Lantern Movie Power Ring T-Shirt. Celebrate Green Lantern's blockbuster arrival to the big screen with this Green Lantern Movie Power Ring T-Shirt! Inspired by Ryan Reynolds' live-action portrayal of Hal Jordan, this 100% cotton, high-quality black t-shirt is pre-shrunk and machine washable. Order yours today!
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Metal High Power Green Laser Pointer Pen with Clip
Where can I buy perferably high powered green laser pointer in the Toronto area?
Preferably it can pop balloons, and be under $40. If not just an astronomy grade would be fine. LOWEST PRICE POSSIBLE. And in a store, not online
It's a 50mW Green Diode Laser, here's a good deal on amazon:
