- AZero.
- BInfinity.
- CPositive.
- DNegative.
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The bending of light as it passes from one medium into another is commonly known as:
In the given circuit, with steady current, the potential drop across the capacitor must be
|
(a) V |
(b) V / 2 |
(c) V / 3 |
(d) 2V / 3 |
A prism ABC of angle 30° has its face AC silvered. A ray of light incident at an angle of 45° at the face AB retraces its path after refraction at face AB and reflection at face AC. The refractive index of the material of the prism is
|
(a) 1.5 |
(b) |
(c) |
(d) |
The internal resistance of a primary cell is 4 ohm. It generates a current of 0.2 amp in an external resistance of 21 ohm. The rate at which chemical energy is consumed in providing the current is
|
(a) 0.42 J/s |
(b) 0.84 J/s |
(c) 5 J/s |
(d) 1 J/s |
Two coherent sources separated by distance d are radiating in phase having wavelength l. A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of n = 4 interference maxima is given as
|
(a) |
(b) |
(c) |
(d) |
Electric potential at an equatorial point of a small dipole with dipole moment P (r, distance from the dipole) is
|
(a) Zero |
(b) |
(c) |
(d) |
The primary winding of transformer has 500 turns whereas its secondary has 5000 turns. The primary is connected to an ac supply of 20 V, 50 Hz. The secondary will have an output of
|
(a) 200 V, 50 Hz |
(b) 2 V, 50 Hz |
(c) 200 V, 500 Hz |
(d) 2 V, 5 Hz |