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प्रश्न
The power of an electric device is a product of ______ and ______.
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उत्तर
The power of an electric device is a product of electric current and the potential difference.
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संबंधित प्रश्न
In the circuit diagram given below, three resistors R1, R2, and R3 of 5 Ω, 10 Ω and 30 Ω, respectively are connected as shown
Calculate:
- current through each resistor.
- total current in the circuit.
- total resistance in the circuit.
A cell supplies a current of 1.2 A through two 2 Ω resistors connected in parallel. When the resistors are connected in series, it supplies a current of 0.4 A. Calculate:
(i) the internal resistance and (ii) e.m.f. of the cell.
A 720 W heater operates from a 220 V line voltage. Calculate:
(a) The electrical energy consumed by the heater in 3 h.
(b) The cost of electrical energy consumption at the rate of 60 paise per kWh.
Find the effective resistance in the following circuit diagrams (Fig.):
State the S.I. units of electrical power.
Complete the following:
1 kWh = _________ J
What is meant by internal resistance of a cell?
