Question

9. A constant current flows in a horizontal wire in the plane of the

paper from east to west . The direction

of magnetic field at a point will be North to South

(a) directly above the wire

(b) directly below the wire

(c) at a point located in the plane of the paper, on the north side

of the wire

(d) at a point located in the plane of the paper, on the south

side of the wire

10. The strength of magnetic field inside a long current carrying

straight solenoid is

(a) more at the ends than at the centre

(b) minimum in the middle

(c) same at all points

(d) found to increase from one end to the other

Answer 1

10. (a) 9. (b) this is the answer of both questions

Answer 2

in question 9.a and in 10.c