Advertisements
Advertisements
प्रश्न
An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the current through the filament of the bulb.
Advertisements
उत्तर
Given: P = 100 W, V = 250 volt
The current through the filament, I = `"P"/"V" = 100/250 = 0.4` A.
APPEARS IN
संबंधित प्रश्न
Electrical power P is given by the expression P = (Q × V) ÷ time. What do the symbols Q and V represent?
List the names of three electrical gadgets used in your house. Write their power, voltage ratingand approximate time for which each one is used in a day. Hence find the electrical energyconsumed by each in a day.
An electric bulb is rated 250 W, 230 V. Calculate:
- the energy consumed in one hour
- the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.
Calculate the resistance of an electric bulb which allows a 10 A current when connected to a 220 V power source.
An electric bulb, when connected across a power supply of 220 V, consumes a power of 60 W. If the supply drops to 180 V, what will be the power consumed? If the supply is suddenly increased to 240 V, what will be the power consumed?
Water in an electric kettle connected to a 220 V supply took 5 minutes to reach its boiling point. How long will it take if the supply voltage falls to 200 V?
Define Kilo watt hour.
Give two precautious that you would take while putting off an electric switch.
An Electric bulb is marked 100 W, 230 V. What how long would this lamp take to consume one unit of electricity?
