- AIncreases.
- BDecreases.
- CRemains the same.
- DVaries in a way that depends on the actual value of A.
Explanation:
Binding energy per nucleon in a nucleus first increases with increasing mass number (A) and reaches a maximum of 8.7MeV for A (50 - 80). Then, again it slowly starts decreasing with the increase in A and drops to the value of 7.5MeV.
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The period of oscillations of a magnetic needle in a magnetic field is 1.0 sec. If the length of the needle is halved by cutting it, the time period will be
| (a) 1.0 sec | (b) 0.5 sec | (c) 0.25 sec | (d) 2.0 sec |
Eddy currents are used in
|
(a) Induction furnace |
(b) Electromagnetic brakes |
|
(c) Speedometers |
(d) All of these |
Which of the following electromagnetic waves have minimum frequency
|
(a) Microwaves |
(b) Audible waves |
(c) Ultrasonic waves |
(d) Radiowaves |
The time constant of an LR circuit represents the time in which the current in the circuit
|
(a) Reaches a value equal to about 37% of its final value |
|
(b) Reaches a value equal to about 63% of its final value |
|
(c) Attains a constant value |
|
(d) Attains 50% of the constant value |
The ratio of intensities of consecutive maxima in the diffraction pattern due to a single slit is
|
(a) 1 : 4 : 9 |
(b) 1 : 2 : 3 |
(c) 1 : |
(d) 1 : |