Recent questions tagged bulb

Description : How To Light a Light Bulb with a Balloon

Last Answer : Materials: Hard rubber comb or balloon A dark room Fluorescent light bulb (not an incandescent bulb) SAFETY NOTE: DO NOT USE ELECTRICITY FROM A WALL OUTLET FOR THIS EXPERIMENT. Handle the glass ... end of the tube. (Fluorescent and incandescent light bulbs will be discussed in a future issue.)

Description : How to Remove a Broken Light Bulb from Socket

Last Answer : How to Remove a Broken Light Bulb from Socket Removing a broken light bulb is dangerous if you don't apply precautionary measures. Its jagged edges can cut your fingers with ease. In addition, the ... to hold the remaining pieces of the bulb together, so you can easily twist it off the socket.

Description : How to Change a Light Bulb

Last Answer : How to Change a Light Bulb If you're still hesitant about changing the light bulb that needed to be changed ten years ago, fear no longer. You don't need to count how many vampires, chickens ... this article, you'll surely be interested in learning how to remove a broken light bulb form socket.

Description : How to Choose an Energy Saving Light Bulb?

Last Answer : Popular in Russia Ilyich's bulbs are becoming a thing of the past, giving way to more modern lamps, which, as the name suggests, are designed to help conserve energy. What are their advantages ... light bulb for certain conditions, which will last a long time and will be efficient enough to use.

Description : About how many times longer would a 10 watt light bulb be able to burn compared to a 100 watt bulb with the same energy?  (A) 10 times longer (B) 100 times longer (C) Same time (D) None of the above

Last Answer : About how many times longer would a 10 watt light bulb be able to burn compared to a 100 watt bulb with the same energy?  (A) 10 times longer (B) 100 times longer (C) Same time (D) None of the above

Description : A 100-watt light bulb turned on for 8 hours uses :  (A) 800 Wh (B) 0.8 kWh (C) 8 kWh (D) None of the above

Last Answer : A 100-watt light bulb turned on for 8 hours uses :  (A) 800 Wh (B) 0.8 kWh (C) 8 kWh (D) None of the above

Description : A 500 W bulb fitted with a reflector illuminates an area of 2 m x 2 m with an average illumination of 500 lux. The efficiency of the reflector is 50%. The efficiency of the bulb in lumens/watt is : 

Last Answer : A 500 W bulb fitted with a reflector illuminates an area of 2 m x 2 m with an average illumination of 500 lux. The efficiency of the reflector is 50%. The efficiency of the bulb in lumens/watt is : 8

Description : A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will?

Last Answer : A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will increase.

Description : The hot resistance of the bulb's filament is higher than its cold resistance because the temperature co-efficient of the filament is?

Last Answer : This  is  because  resistance  of  a  conductor  increases  with  increase  in  temperature .

Description : The filament of an electric bulb is made of?

Last Answer : The filament of an electric bulb is made of tungsten.

Description : Power factor of electric bulb is?

Last Answer : Power factor of electric bulb is unity.

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