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प्रश्न
Which of the following units could be used to measure electric charge?
(a) ampere
(b) joule
(c) volt
(d) coulomb
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उत्तर
coulomb
It is the SI unit of electric charge
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संबंधित प्रश्न
Draw the electrical symbols of the following components and state its use
Wire crossing
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
How many microamperes are there in 1 ampere?
Compare how an ammeter and a voltmeter are connected in a circuit.
What is an electric current?
What Makes an Electric Current Flow in a Wire?
In the circuit shown below, the voltmeter reads 10 V.
(a) What is the combined resistance?
(b) What current flows?
(c) What is the p.d. across 2 Ω resistor?
(d) What is the p.d. across 3 Ω resistor?
Using the circuit given below, state which of the following statement is correct?
(a) When S1 and S2 are closed, lamps A and B are lit.22
(b) With S1 open and S2 closed, A is lit and B is not lit.
(c) With S2 open and S1 closed A and B are lit.
(d) With S1 closed and S2 open, lamp A remains lit even if lamp B gets fused.
A switch must be connected in:
(a) Live wire (b) neutral wire
(c) earth wire (d) either earth or neutral wire
Calculate the equivalent resistance between A and B in the adjacent diagram.
Tell the odd one out. Give a proper explanation.
Tick (✓) the correct choice among the following :
There are 500 turns and 2000 turns in the primary and secondary coil of a
transformer respectively. If th e output voltage is 1000 V, how large is the
input voltage?
State whether the current is a scalar or vector?
A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5 Ω . A steady current of 0.5 A flows through the circuit. Calculate:
The energy dissipated in the bulb in 10 minutes.
Fill in the blank :
1 mA = ............................. A.
State whether true or false. If false, correct the statement.
Current can produce magnetic field.
- 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?
An ammeter is always placed in parallel with the circuit.
