The potential at a point due to an electric dipole will be maximum and minimum when the angles between the axis of the dipole and the line joining the point to the dipole are respectively
|
(a) 90° and 180 ° |
(b) 0° and 90° |
(c) 90 ° and 0° |
(d) 0° and 180° |
(d) 0° and 180°
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A rectangular loop with a sliding connector of length l = 1.0 m is situated in a uniform magnetic field B = 2T perpendicular to the plane of loop. Resistance of connector is r = 2W. Two resistance of 6W and 3W are connected as shown in figure. The external force required to keep the connector moving with a constant velocity v = 2m/s is
|
(a) 6 N |
(b) 4 N |
(c) 2 N |
(d) 1 N |
The laptop PC’s modern electronic watches and calculators use the following for display
|
(a) Single crystal |
(b) Poly crystal |
(c) Liquid crystal |
(d) Semiconductors |
A cube of side l is placed in a uniform field E, where E = E
. The net electric flux through the cube is
|
(a) Zero |
(b) |
(c) 4 |
(d) 6 |
