- AMicro hertz
- BGiga hertz
- CMega hertz
- DHertz
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When light rays are incident on a prism at an angle of 45°, the minimum deviation is obtained. If refractive index of the material of prism is , then the angle of prism will be
|
(a) 30° |
(b) 40° |
(c) 50° |
(d) 60° |
Among the two interfering monochromatic sources A and B; A is ahead of B in phase by 66°. If the observation be taken from point P, such that PB – PA = l/4. Then the phase difference between the waves from A and B reaching P is
|
(a) 156° |
(b) 140° |
(c) 136° |
(d) 126° |
In the absence of other conductors, the surface charge density
|
(a) Is proportional to the charge on the conductor and its surface area |
|
(b) Inversely proportional to the charge and directly proportional to the surface area |
|
(c) Directly proportional to the charge and inversely proportional to the surface area |
|
(d) Inversely proportional to the charge and the surface area |
If each resistance in the figure is of 9 W then reading of ammeter is
|
(a) 5 A |
(b) 8 A |
(c) 2 A |
(d) 9 A |
Vibration magnetometer before use, should be set
| (a) In magnetic meridian | (b) In geographical meridian |
| (c) Perpendicular to magnetic meridian | (d) In any position |
In Thomson spectrograph experiment, four positive ions P,Q,R and S are situated on Y-X curve a shown in the figure

|
(a) The specific charge of R and S are same |
|
(b) The masses of P and S are same |
|
(c) The specific charges of Q and R are same |
|
(d) The velocities of R and S are same |
A 2 MeV proton is moving perpendicular to a uniform magnetic field of 2.5 tesla. The force on the proton is
|
(a) 2.5 |
(b) 7.6 |
(c) 2.5 |
(d) 7.6 |