Explanation:
According to the right-hand thumb rule, if we curl the fingers of our right hand in the direction of the current flowing, then the stretching of the thumb will show the direction of the magnetic field developed due to it and vice versa.
Let north-south is along x axis and east-west is along y axis. Circular wire is in xz plane. Then point A will lie on positive y axis and B on negative y axis. On looking from point B, current is flowing in anticlockwise direction so the magnetic field will point from right to left. Hence, the magnetic field due to the loop will be towards west at both A and B.
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Plane of eddy currents makes an angle with the plane of magnetic lines of force equal to
|
(a) 40° |
(b) 0° |
(c) 90° |
(d) 180° |
If 
undergoes successively 8 a-decays and 6 b-decays, then resulting nucleus is
|
(a) |
(b) |
(c) |
(d) |
The capacity of parallel plate condenser depends on
|
(a) The type of metal used |
(b) The thickness of plates |
|
(c) The potential applied across the plates |
(d) The separation between the plates |
