Question

Choose the correct option.

1. Which of the following is not correct?
(a) Conductors have more charge than
insulators.

(b) Conductors allow charge to flow through
them more easily than insulators.

(c) Common metals are good conductors.

(d) Electrical wires are usually covered byinsulators.

2. Which of the following is not a source of
electric current?
(a) Battery

(b) Cell

(c) Conductor

(d) Mains

3. Which of the following materials is generally
used as the core of an electromagnet?
(a) Steel

(b) Iron

(c) Alnico

(d) Magnetite

4. Which of the following is not true of magnetic
lines of force?
(a) They do not intersect each other.

(b) They are continuous curves.

(c) They are crowded together where the magnetic field is weak.

(d) They go from the north pole to the south pole outside a magnet and from the south
pole to the north pole inside it.​

Answer 1

1 Common metals are good conductors.

2 mains

3 iron

4 They are crowded together where the magnetic field is weak.

Answer 2

Answer:

1. (a)

2. (d)

3. (c)

4. (c)