If a unit positive charge is taken from one point to another over an equipotential surface, then
|
(a) Work is done on the charge |
(b) Work is done by the charge |
|
(c) Work done is constant |
(d) No work is done |
(d) No work is done
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
In a diffraction pattern by a wire, on increasing diameter of wire, fringe width
|
(a) Decreases |
|
(b) Increases |
|
(c) Remains unchanged |
|
(d) Increasing or decreasing will depend on wavelength |
Radius of first Bohr orbit is r. What is the radius of 2nd Bohr orbit?
| (a) 8r | (b) 2r | (c) 4r |
(d) 2
|
The value of plate current in the given circuit diagram will be
|
(a) 3 mA |
(b) 8 mA |
(c) 13 mA |
(d) 18 mA |
In the following figure, the magnet is moved towards the coil with a speed v and induced emf is e. If magnet and coil recede away from one another each moving with speed v, the induced emf in the coil will be
|
(a) e |
(b) 2e |
(c) e/2 |
(d) 4e |
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 |
The direction of line of magnetic field of bar magnet is
|
(a) From south pole to north pole |
|
(b) From north pole to south pole |
|
(c) Across the bar magnet |
|
(d) From south pole to north pole inside the magnet and from north pole to south pole outside the magnet |
In the given circuit the current I1 is
|
(a) 0.4 A |
(b) – 0.4 A |
(c) 0.8 A |
(d) – 0.8 A |