- APurification
- BAmplification
- CRectification
- DCurrent Amplification
Explanation:
The process by which ac is converted into dc is known as "Rectification".
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An LC resonant circuit contains a 400 pF capacitor and a 100 mH inductor. It is set into oscillation coupled to an antenna. The wavelength of the radiated electromagnetic waves is
|
(a) 377 mm |
(b) 377 metre |
(c) 377 cm |
(d) 3.77 cm |

Masses of three wires of copper are in the ratio of 1 : 3 : 5 and their lengths are in the ratio of 5 : 3 : 1. The ratio of their electrical resistances are
|
(a) 1 : 3 : 5 |
(b) 5 : 3 : 1 |
(c) 1 : 15 : 125 |
(d) 125 : 15 : 1 |
The photoelectric threshold wavelength of a certain metal is 3000Å. If the radiation of 2000Å is incident on the metal
|
(a) Electrons will be emitted |
(b) Positrons will be emitted |
|
(c) Protons will be emitted |
(d) Electrons will not be emitted |