Advertisements
Advertisements
Question
If a bulb of 60W is connected across a source of 220V, find the current drawn by it.
Advertisements
Solution
Power P = 60W, Voltage V = 220. To find eye ?
We have current `I = P/V = 60/220= 0.272 A`
APPEARS IN
RELATED QUESTIONS
An electric bulb is rated at 220 V, 100 W. What is its resistance?
1Kwh =`( 1 "volt "xx 1 am pere xx.............)/1000`
An electric kettle is rated 2.5 kW, 250 V. Find the cost of running the kettle for two hours at Rs. 5.40 per unit.
Calculate the resistance of an electric bulb which allows a 10 A current when connected to a 220 V power source.
A current passes through a resistor. Let K1 and K2 represent the average kinetic energy of the conduction electrons and the metal ions, respectively.
What does the unit kilowatt hour measure? Define it.
Why is heating coil wound in the form of a helix in electric stove?
What would happen and why, to an electric bulb when it is connected across a supply of voltage (i) lower (ii) higher than its proper rating?
An electric bulb is marked 100 W, 230 V. What does this mean?
Two electric lamps each rating 100 W, 110 V are connected in series to a 220 V power supply and two other electric lamps each of marking 100 W, 220 V are connected in parallel to the same power supply. Will anyone of the two combinations give more light than the other? Give a reason for your answer.
Why is the electric power from the generating station transmitted at high voltage?
How does the heat produced by die passage of current in a metallic wire depend on the time of passage of current in the wire?
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate the resistance of each heater.
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate the energy supply in kWh to the three heaters in 5 hour.
State (i) the S. I. unit, (ii) the household unit, of electrical energy. How are these units related?
An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the current through the filament of the bulb.
A battery of e.m.f. 12V and internal resistance 1.6 Ω is connected to two resistors of 4Ω and 6Ω connected in parallel. Calculate:
(i) the current drawn from the battery,
(ii) the power dissipated in each resistor,
(ii)the total power supplied by the battery.
The unit of e.m.f. of a cell is ____________.
1 mV is equal to:
