A conducting loop carrying a current I is placed in a uniform magnetic field pointing into the plane of the paper as shown. The loop will have a tendency to
|
(a) Contract |
(b) Expand |
|
(c) Move towards +ve x –axis |
(d) Move towards –ve x-axis |
(b) Expand
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The binding energies per nucleon for a deuteron and an α- particle are x1 and x2 respectively. What will be the energy Q released in the reaction 
|
(a) 4 |
(b) 4 |
(c) 2( |
(d) 2 |
Nucleus produced due to a-decay of the nucleus 
is
|
(a) |
(b) |
(c) |
(d) |
Assertion : De-morgan's theorem 
may be explained by the following circuit
Reason : In the following circuit, for output inputs ABC are 101
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
If there had been one eye of the man, then
|
(a) Image of the object would have been inverted |
(b) Visible region would have decreased |
|
(c) Image would have not been seen three dimensional |
(d) (b) and (c) both |
Solar energy is mainly caused due to
|
(a) Fission of uranium present in the sun |
|
(b) Fusion of protons during synthesis of heavier elements |
|
(c) Gravitational contraction |
|
(d) Burning of hydrogen in the oxygen |
Two vertical plane mirrors are inclined at an angle of 60° with each other. A ray of light travelling horizontally is reflected first from one mirror and then from the other. The resultant deviation is
| (a) 60° | (b) 120° | (c) 180° | (d) 240° |
In a photocell bichromatic light of wavelength 2475 Å and 6000 Å are incident on cathode whose work function is 4.8 eV. If a uniform magnetic field of 3 × 10–5 Tesla exists parallel to the plate, the radius of the path describe by the photoelectron will be (mass of electron = 9 × 10–31 kg)
|
(a) 1 cm |
(b) 5 cm |
(c) 10 cm |
(d) 25 cm |
