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

1. Name the three connecting wires used in a household circuit.
2. Which of the two wires mentioned in part (a) are at the same potential?
3. In which of the wire stated in part (a) the switch is connected?

What is the pole fuse? Write down its current rating.

The electrical appliances in a house are connected in ______.

The rating of a fuse connected in the lighting circuit is:
(a) 15 A (b) 5 A (c) 10 A (d) Zero

A switch must be connected in:
(a) Live wire (b) neutral wire
(c) earth wire (d) either earth or neutral wire

Describe an experiment to demonstrate that there is a magnetic field around a current carrying conductor.

Find the potential difference required to pass a current of 0.2 A in a wire of resistance 20Ω

What will happen to a compass needle when the compass is placed below a wire with needle parallel to it and a current is made to flow through the wire? Give a reason to justify your answer.

A given wire of resistance 1 Ω is stretched to double its length. What will be its new resistance?

When current flows in a wire, it creates ______.

State two differences between the e.m.f. and terminal voltage of a cell.

The present of magnetic field at a point can be detected by ______.

By reversing the direction of current in a wire, the magnetic field produced by it:

A wire of uniform thickness with a resistance of 27Ω is cut into three equal pieces and they are joined in parallel. Find the equivalent resistance of the parallel combination. 

Calculate the effective resistance between the points A and B in the network shown below in Figure 8.45   

Calculate the equivalent resistance between A and B in the adjacent diagram.

In the network shown in the following adjacent Figure, calculate the equivalent resistance between the points.  

1. A and B
2. A and C

Two resistors of 2.0 Ω and 3.0 Ω are connected (a) in series (b) in parallel, with a battery of 6.0 V and negligible internal resistance. For each case draw a circuit diagram and calculate the current through the battery. 

A wire of length 5 m has a resistance of 2.0 Ω calculate:
(a) the resistance of wire of length 1 m
(b) the equivalent resistance if two such wires each of length 2 m are joined in parallel.
(c) the resistance of 1 m length of wire of same material but of half diameter. 

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.