- Acontinuous when electric field is changing in the circuit
- Bcontinuous when magnetic field is changing in the circuit
- Ccontinuous in both types of fields
- Dcontinuous through wires and resistance only
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Which of the following statement is true about magnetic moments of atoms of different elements
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(a) All have a magnetic moment |
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(b) None has a magnetic moment |
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(c) All acquire a magnetic moment under external magnetic field and in same direction as the field |
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(d) None of the above statements are accurate |
A bi-convex lens made of glass (refractive index 1.5) is put in a liquid of refractive index 1.7. Its focal length will
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(a) Decrease and change sign |
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(b) Increase and change sign |
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(c) Decrease and remain of the same sign |
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(d) Increase and remain of the same sign |
A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced current in wires AB and CD are

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(a) B to A and D to C |
(b) A to B and C to D |
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(c) A to B and D to C |
(d) B to A and C to D |
Four charges are arranged at the corners of a square ABCD, as shown in the adjoining figure. The force on the charge kept at the centre O is
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(a) Zero |
(b) Along the diagonal AC |
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(c) Along the diagonal BD |
(d) Perpendicular to side AB |
The true statement is
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(a) The order of colours in the primary and the secondary rainbows is the same |
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(b) The intensity of colours in the primary and the secondary rainbows is the same |
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(c) The intensity of light in the primary rainbow is greater and the order of colours is the same than the secondary rainbow |
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(d) The intensity of light for different colours in primary rainbow is greater and the order of colours is reverse than the secondary rainbow |