Equivalent capacitance between A and B is
|
(a) 8 μC |
(b) 6 μF |
(c) 26 μF |
(d) 10/3 μF |
Equivalent capacitance between A and B is
|
(a) 8 μC |
(b) 6 μF |
(c) 26 μF |
(d) 10/3 μF |
(a) 8 μC
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Two particles each of mass m and charge q are attached to the two ends of a light rigid rod of length 2R. The rod is rotated at constant angular speed about a perpendicular axis passing through its centre. The ratio of the magnitudes of the magnetic moment of the system and its angular momentum about the centre of the rod is
|
(a) |
(b) |
(c) |
(d) |
A plane mirror produces an image that is:
The PN junction diode is used as
| (a) An amplifier | (b) A rectifier | (c) An oscillator | (d) A modulator |
Critical angle for light going from medium (i) to (ii) is q. The speed of light in medium (i) is v then speed in medium (ii) is
|
(a) v(1- cosθ) |
(b) v/sinθ |
(c) v/cosθ |
(d) v(1- sinθ) |
Two waves have their amplitudes in the ratio 1 : 9. The maximum and minimum intensities when they interfere are in the ratio
|
(a) |
(b) |
(c) |
(d) |
When a metal surface is illuminated by light of wavelengths 400 nm and 250 nm, the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is (h = Planck’s constant, c = velocity of light in air)
|
(a) 2hc |
(b) |
(c) |
(d) 0.5 |
Brilliance of diamond is due to
|
(a) Shape |
(b) Cutting |
|
(c) Reflection |
(d) Total internal reflection |