In Young's double slit experiment, if the two slits are illuminated with separate sources, no interference pattern is observed because
|
(a) There will be no constant phase difference between the two waves |
|
(b) The wavelengths are not equal |
|
(c) The amplitudes are not equal |
|
(d) None of the above |
(a) There will be no constant phase difference between the two waves
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The kinetic energy of an electron with de-Broglie wavelength of 0.3 nanometer is
|
(a) 0.168 eV |
(b) 16.8 eV |
(c) 1.68 eV |
(d) 2.5 eV |
A steady current i flows in a small square loop of wire of side L in a horizontal plane. The loop is now folded about its middle such that half of it lies in a vertical plane. Let 
and 
respectively denote the magnetic moments due to the current loop before and after folding. Then
|
(a) |
(b) |
|
(c) |
(d) |
The relation among u, v and f for a mirror is:
Four resistances 10 W, 5 W, 7 W and 3 W are connected so that they form the sides of a rectangle AB, BC, CD and DA respectively. Another resistance of 10 W is connected across the diagonal AC. The equivalent resistance between A and B is
|
(a) 2 W |
(b) 5 W |
(c) 7 W |
(d) 10 W |
The drift velocity does not depend upon
|
(a) Cross-section of the wire |
(b) Length of the wire |
|
(c) Number of free electrons |
(d) Magnitude of the current |
What will be the ratio of de-Broglie wavelengths of proton and α - particle of same energy
|
(a) 2 : 1 |
(b) 1 : 2 |
(c) 4 : 1 |
(d) 1 : 4 |
If the potential of a capacitor having capacity of 6 mF is increased from 10 V to 20 V, then increase in its energy will be
|
(a) 12 × 10–6 J |
(b) 9 × 10–4 J |
(c) 4 × 10–6 J |
(d) 4 × 10–9 J |
