- AAtom bomb
- BHydrogen bomb
- CNeutron bomb
- DNone of these
Explanation:
The fission bomb or atom bomb works on the principle that it takes energy to put together a nucleus with many protons and neutrons.
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The angle of dip is the angle
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(a) Between the vertical component of earth's magnetic field and magnetic meridian |
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(b) Between the vertical component of earth's magnetic field and geographical meridian |
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(c) Between the earth's magnetic field direction and horizontal direction |
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(d) Between the magnetic meridian and the geographical meridian |
Assertion : Only a change in magnetic flux will maintain an induced current the coil.
Reason : The presence of large magnetic flux through a coil maintains a current in the coil if the circuit is continuous.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
If a wire of length 1 meter placed in uniform magnetic field 1.5 Tesla at angle 30° with magnetic field. The current in a wire 10 amp. Then force on a wire will be
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(a) 7.5 N |
(b) 1.5 N |
(c) 0.5 N |
(d) 2.5 N |
In a transformer, the number of turns in primary and secondary are 500 and 2000 respectively. If current in primary is 48 A, the current in the secondary is
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(a) 12 A |
(b) 24 A |
(c) 48 A |
(d) 144 A |

In the graph given below. If the slope is 4.12
V-sec, then value of ‘h’ should be

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(a) 6.6 |
(b) 6.6 |
(c) 9.1 |
(d) None of these |
Current in the circuit will be

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(a) |
(b) |
(c) |
(d) |