Explanation:
$\text{e}=-\text{L}\frac{\text{di}}{\text{dt}}$
Current flow in the CKt is clock wise direction, due to Mutual Induction current flow in the loop anti clockwise direction. The net force applied on the loop in east direction. So we can say that the ring will move away from the solenoid.
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Fermi level of energy of an intrinsic semiconductor lies
|
(a) In the middle of forbidden gap |
(b) Below the middle of forbidden gap |
|
(c) Above the middle of forbidden gap |
(d) Outside the forbidden gap |
A permanent magnet
|
(a) Attracts all substances |
|
(b) Attracts only magnetic substances |
|
(c) Attracts magnetic substances and repels all non-magnetic substances |
|
(d) Attracts non-magnetic substances and repels magnetic substances |
The X-ray beam coming from an X-ray tube will be
| (a) Monochromatic |
|
(b) Having all wavelengths smaller than a certain maximum wavelength |
|
(c) Having all wavelengths larger than a certain minimum wavelength |
|
(d) Having all wavelengths lying between a minimum and a maximum wavelength |
When light wave suffers reflection at the interface from air to glass, the change in phase of the reflected wave is equal to
| (a) 0 |
(b) 
|
(c) 
|
(d) 2
|
A ray of light is incident at an angle of 60° on one face of a prism of angle 30°. The ray emerging out of the prism makes an angle of 30° with the incident ray. The emergent ray is
|
(a) Normal to the face through which it emerges |
|
(b) Inclined at 30° to the face through which it emerges |
|
(c) Inclined at 60° to the face through which it emerges |
|
(d) None of these |
The magnetic induction at the centre O in the figure shown is
|
(a) |
(b) |
(c) |
(d) |
