- AElectric field
- BMagnetic field
- CPlasma field
- DGravitational field
Explanation:
Gravitational field applies minimum force on cathode rays because gravitational forces are proportional to masses but not charges.
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The work done in placing a charge of 8 × coulomb on a condenser of capacity 100 micro-farad is
|
(a) 32 |
(b) 16 |
(c) 3.1 |
(d) 4 |
An experiment is performed to find the refractive index of glass using a travelling microscope. In this experiment distances are measured by:
While tuning in a certain broadcast station with a receiver, we are actually
|
(a) Varying the local oscillator frequency |
|
(b) Varying the frequency of the radio signal to be picked up |
|
(c) Tuning the antenna |
|
(d) None of these |
When cathode rays strike a metal target of high melting point with very high velocity, then
| (a) X-rays are produced | (b) Ealpha-rays are produced |
| (c) TV waves are produced |
(d) Ultrasonic waves are produced |
