- Adecreases
- Bincreases directly with frequency
- Cincreases as square of frequency
- Ddecreases inversely with frequency
Explanation:
The inductive reactance $\text{Xl}=\omega\text{L}$
Hence, $\text{X}_1\propto\omega$
As frequency increases $\rightarrow\omega$
Therefore, inductive reactance increases with frequency.
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The electrons are emitted in the photoelectric effect from a metal surface
|
(a) Only if the frequency of the incident radiation is above a certain threshold value |
|
(b) Only if the temperature of the surface is high |
|
(c) At a rate that is independent of the nature of the metal |
|
(d) With a maximum velocity proportional to the frequency of the incident radiation |
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 |

A light wave has a frequency of 4 Hz and a wavelength of 5
meters in a medium. The refractive index of the medium is
|
(a) 1.5 |
(b) 1.33 |
(c) 1.0 |
(d) 0.66 |
Vibration magnetometer before use, should be set
| (a) In magnetic meridian | (b) In geographical meridian |
| (c) Perpendicular to magnetic meridian | (d) In any position |
At a certain place, the horizontal component of earth's magnetic field is
times the vertical component. The angle of dip at that place is
| (a) 60° | (b) 45° | (c) 90° | (d) 30° |