Explanation:
The current is induced in a closed circuit only if there is a change in number of magnetic field lines in the circuit due to electromagnetic induction according to Faraday's law.
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$\text{v}\geq\text{v}_0$
$\text{v}>2\text{v}_0$
$\text{v}<\text{v}_0$
$\text{v}<\frac{\text{v}_0}{2}$
The heat produced by a 100 watt heater in 2 minute will be equal to
|
(a) 12 |
(b) 10 |
(c) 6 |
(d) 3 |
Ozone is found in
|
(a) Stratosphere |
(b) Ionosphere |
(c) Mesosphere |
(d) Troposphere |
A plane mirror makes an angle of 30° with horizontal. If a vertical ray strikes the mirror, find the angle between mirror and reflected ray
| (a) 30° | (b) 45° | (c) 60° | (d) 90° |
A polaroid is placed at 45o to an incoming light of intensity 
. Now the intensity of light passing through polaroid after polarisation would be
|
(a) |
(b) |
(c) |
(d) Zero |
Magnetic intensity for an axial point due to a short bar magnet of magnetic moment M is given by
|
(a) |
(b) |
(c) |
(d) |
The current carrying wire and the rod AB are in the same plane. The rod moves parallel to the wire with a velocity v. Which one of the following statements is true about induced emf in the rod
|
(a) End A will be at lower potential with respect to B |
|
(b) A and B will be at the same potential |
|
(c) There will be no induced e.m.f. in the rod |
|
(d) Potential at A will be higher than that at B |
