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प्रश्न
MCB is used to protect household electrical appliances.
विकल्प
True
False
उत्तर
MCB is used to protect household electrical appliances - true.
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संबंधित प्रश्न
In which direction does conventional current flow around a circuit?
A student made an electric circuit shown here to measure the current through two lamps.
Are the lamps in series or parallel?
(a) Are the lamps in series or parallel?
(b) The student has made a mistake in this circuit. What is the mistake?
(c) Draw a circuit diagram to show the correct way to connect the circuit. Use the proper circuit symbols in your diagram.
Consider the circuit given below:
(a) In which circuit are the lamps dimmest?
(b) In which circuit or circuits are the lamps of equal brightness to the lamps in circuit (i)?
(c) Which circuit gives out the maximum light?
The work done in moving unit positive charge across two points in an electric circuit is a measure of
Tick(✓) the correct choice in the following:
When the length of a conductor is doubled the resistance of the conductor
will
Find the effective resistance in the following circuit diagrams (Fig.):
Electrical appliances have voltage and power ratings as listed below. Which
has the larger working resistance?
| Appliances | Voltage (V) | Power (W) |
| (a) Washing machine | 250 | 3000 |
| ( b) Television | 240 | 160 |
| (c)240 | 240 | 1500 |
| ( d) Hair curler | 250 | 20 |
| ( e) Car head lamp | 12 | 36 |
State whether the current is a scalar or vector?
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.
