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प्रश्न
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उत्तर
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संबंधित प्रश्न
The work done in moving a unit charge across two points in an electric circuit is a measure of:
(a) current
(b) potential difference
(c) resistance
(d) power
The circuit diagram given below shows the combination of three resistors R1, R2 and R3:
Find :
(i) total resistance of the circuit.
(ii) total current flowing in the circuit.
(iii) the potential difference across R1.
A p.d. of 6 V is applied to two resistors of 3 Ω and 6 Ω connected in parallel. Calculate:
(a) the combined resistance
(b) the current flowing in the main circuit
(c) the current flowing in the 3 Ω resistor.
What happens to the other bulbs in a series circuit if one bulb blows off?
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
(c) In which circuit, if one bulb blows out, all other will stop glowing?
Distinguish between an open and a closed circuit.
One unit of electrical energy consumed is equal to 1000 kilowatt-hour.
- What is meant by electric current?
- Name and define its unit.
- Which instrument is used to measure the electric current? How should it be connected in a circuit?
For current to flow, one needs art open circuit.
