- ACircular anticlockwise.
- BCircular clockwise.
- CRadial, inwards.
- DRadial, outwards.
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Assertion : The unpolarised light and polarised light can be distinguished from each other by using polaroid.
Reason : A polaroid is capable of producing plane polarised beams of light.
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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. |
In nuclear fission, the fission reactions proceeds with a projectile. Which of the following suits the best
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(a) Slow proton |
(b) Fast neutron |
(c) Slow neutron |
(d) None of these |
A symmetric double convex lens is cut in two equal parts by a plane containing the principal axis. If the power of the original lens was 4D, the power of a divided lens will be:
Assertion : X-rays can penetrate through the flesh but not through the bones.
Reason : The penetrating power of X-rays depends on voltage.
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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. |
The ratio of the energy of a photon with
to that with
is
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(a) 2 |
(b) 1/4 |
(c) 4 |
(d) 1/2 |
Assertion : Torque on the coil is the maximum, when coil is suspended in a radial magnetic field.
Reason : The torque tends to rotate the coil on its own axis.
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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. |
The efficiency of transformer is very high because
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(a) There is no moving part in a transformer |
(b) It produces very high voltage |
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(c) It produces very low voltage |
(d) None of the above |
A circular disc is placed in front of a narrow source. When the point of observation is at a distance of 1 meter from the disc, then the disc covers first HPZ. The intensity at this point is I0. The intensity at a point distance 25 cm from the disc will be
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(a) |
(b) |
(c) |
(d) |