Basically, the product modulator is
|
(a) An amplifier |
(b) A mixer |
|
(c) A frequency separator |
(d) A phase separator |
Basically, the product modulator is
|
(a) An amplifier |
(b) A mixer |
|
(c) A frequency separator |
(d) A phase separator |
(b) A mixer
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5 cm long solenoid having 10 ohm resistance and 5 mH inductance is joined to a 10 volt battery. At steady state the current through the solenoid in ampere will be
|
(a) 5 |
(b) 1 |
(c) 2 |
(d) Zero |
Two identical short bar magnets, each having magnetic moment M, are placed a distance of 2d apart with axes perpendicular to each other in a horizontal plane. The magnetic induction at a point midway between them is
|
(a) |
(b) |
(c) |
(d) |
64 small drops of mercury, each of radius r and charge q coalesce to form a big drop. The ratio of the surface density of charge of each small drop with that of the big drop is
|
(a) 1 : 64 |
(b) 64 : 1 |
(c) 4 : 1 |
(d) 1 : 4 |
Two magnets of same size and mass make respectively 10 and 15 oscillations per minute at certain place. The ratio of their magnetic moments is
| (a) 4 : 9 | (b) 9 : 4 | (c) 2 : 3 | (d) 3 : 2 |
In which frequency range, space waves are normally propagated
|
(a) HF |
(b) VHF |
(c) UHF |
(d) SHF |
The material of wire of potentiometer is
|
(a) Copper |
(b) Steel |
(c) Manganin |
(d) Aluminium |