(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

The diagram shows two ways of connecting three lamps P, Q and R to A.C. supply of 220 V.

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When the length of a conductor is doubled the resistance of the conductor
will

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24 watt, 12 volt head lamp is fully lit by connecting it to a 12 volt
battery. The working resistance of the lamp is

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Which of the following quantities has the same value for all electrical
appliances connected to the ring main circuit in a house?

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The outer casing of an electric iron is generally connected to earth in order
to

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A three pin plug is connected to the lead for a 1 kW electric iron to be
used on a 250 V supply. Which of the following statements is not correct?

Define the following:

Electromotive force

Define the following:

Semiconductors

Define the following:

Super conductors

A charge of 80 C flows in a conductor for 2 minutes.
(a) Calculate the current flowing through the conductor.
(b) If the current through a heater is 4 A what charge must be passing in 8 seconds?

Two resistors P and Q of the same material and length but of different thickness are connected in parallel to a battery. The cross- sectional area of P is twice that of Q. What is the ratio of
(a) The resistance of P to the resistance of Q?
(b) The current in P to the current in Q?