Which one is reverse-biased
|
(a) |
(b) |
(c) |
(d) |
Which one is reverse-biased
|
(a) |
(b) |
(c) |
(d) |
(c)
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The condition for observing Fraunhofer diffraction from a single slit is that the light wavefront incident on the slit should be
|
(a) Spherical |
(b) Cylindrical |
(c) Plane |
(d) Elliptical |
A voltmeter has resistance of 2000 ohms and it can measure upto 2V. If we want to increase its range to 10 V, then the required resistance in series will be
|
(a) 2000 Ω |
(b) 4000 Ω |
(c) 6000 Ω |
(d) 8000 Ω |
A ray of light incidents on a plane mirror at an angle of 30°. The deviation produced in the ray is
| (a) 30° | (b) 60° | (c) 90° | (d) 120° |
In a transformer the primary has 500 turns and secondary has 50 turns. 100 volts are applied to the primary coil, the voltage developed in the secondary will be
|
(a) 1 V |
(b) 10 V |
(c) 1000 V |
(d) 10000 V |
The time period of oscillation of a magnet in a vibration magnetometer is 1.5 seconds. The time period of oscillation of another magnet similar in size, shape and mass but having one-fourth magnetic moment than that of first magnet, oscillating at same place will be
| (a) 0.75 sec | (b) 1.5 sec | (c) 3 sec | (d) 6 sec |