Explanation:
In a beta decay, either a neutron is converted to a proton or a proton is converted to a neutron such that the mass number does not change. Also, the number of the nucleons present in the nucleus remains the same. Thus, the active nucleus gets converted to one of its isobars after beta decay.
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Immiscible transparent liquids A, B, C, D and E are placed in a rectangular container of glass with the liquids making layers according to their densities. The refractive index of the liquids are shown in the adjoining diagram. The container is illuminated from the side and a small piece of glass having refractive index 1.61 is gently dropped into the liquid layer. The glass piece as it descends downwards will not be visible in
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(a) Liquid A and B only |
(b) Liquid C only |
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(c) Liquid D and E only |
(d) Liquid A, B, D and E |
Hydrogen atom emits blue light when it changes from n = 4 energy level to the n = 2 level. Which colour of light would the atom emit when it changes from the n = 5 level to the n = 2 level
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(a) Red |
(b) Yellow |
(c) Green |
(d) Violet |
Which of the following is true
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(a) Diamagnetism is temperature dependent |
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(b) Paramagnetism is temperature dependent |
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(c) Paramagnetism is temperature independent |
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(d) None of these |
A nucleus of 
originally at rest emits a particle with speed v. What will be the recoil speed of the daughter nucleus
| (a) 4v/206 | (b) 4v/214 | (c) v/206 | (d) v/214 |
The magnetic flux linked with a coil is given by an equation ∅ (in webers) = 
. The induced e.m.f. in the coil at the fourth second will be
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(a) 16 units |
(b) 39 units |
(c) 67 units |
(d) 145 units |