- AMicro hertz
- BGiga hertz
- CMega hertz
- DHertz
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
In Young's double slit experiment, the fringe width is 1 if the distance between the slit and screen is doubled and the distance between the two slit is reduced to half and wavelength is changed from 6.4
to , 4.0
, the value of new fringe width will be
|
(a) 0.15 |
(b) 2.0 |
(c) 1.25 |
(d) 2.5 |
A 50 mH coil carries a current of 2 ampere. The energy stored in joules is
|
(a) 1 |
(b) 0.1 |
(c) 0.05 |
(d) 0.5 |
A short magnetic needle is pivoted in a uniform magnetic field of strength 1 T. When another magnetic field of strength is applied to the needle in a perpendicular direction, the needle deflects through an angle q, where q is
|
(a) 30o |
(b) 45o |
(c) 90o | (d) 60o |
A copper ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet while it is passing through the ring is
|
(a) Equal to that due to gravity |
|
(b) Less than that due to gravity |
|
(c) More than that due to gravity |
|
(d) Depends on the diameter of the ring and the length of the magnet |
A 2V battery is connected across the points A and B as shown in the figure given below. Assuming that the resistance of each diode is zero in forward bias and infinity in reverse bias, the current supplied by the battery when its positive terminal is connected to A is

|
(a) 0.2 A |
(b) 0.4 A |
(c) Zero |
(d) 0.1 A |
All of the following statements are correct except
|
(a) The magnification produced by a convex mirror is always less than one |
|
(b) A virtual, erect, same-sized image can be obtained using a plane mirror |
|
(c) A virtual, erect, magnified image can be formed using a concave mirror |
|
(d) A real, inverted, same-sized image can be formed using a convex mirror |