Explanation:
In pure inductive circuit,
voltage leads by $\frac{\pi}{2}$
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The energy that should be added to an electron to reduce its de Broglie wavelength from one nm to 0.5 nm is
|
(a) Four times the initial energy |
(b) Equal to the initial energy |
|
(c) Twice the initial energy |
(d) Thrice the initial energy |
The current in the following circuit is
|
(a) |
(b) |
(c) |
(d) 1A |
A player with 3 m long iron rod runs towards east with a speed of 30 km/hr. Horizontal component of earth's magnetic field is 4 
. If he is running with rod in horizontal and vertical positions, then the potential difference induced between the two ends of the rod in two cases will be
|
(a) Zero in vertical position and 1 |
|
(b) 1 |
|
(c) Zero in both cases |
|
(d) 1 |
The condensers of capacity 
and 
are connected in parallel, then the equivalent capacitance is
|
(a) |
(b) |
(c) |
(d) |
What kind of image is obtained always for concave lens?
The number of electrons to be put on a spherical conductor of radius 0.1m to produce an electric field of 0.036 N/C just above its surface is
|
(a) 2.7 |
(b) 2.6 |
(c) 2.5 |
(d) 2.4 |
Two magnets A and B are identical and these are arranged as shown in the figure. Their length is negligible in comparison to the separation between them. A magnetic needle is placed between the magnets at point P which gets deflected through an angle θ under the influence of magnets. The ratio of distance 
and 
will be
|
(a) |
(b) |
(c) |
(d) |
