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Assertion : Moon is seen as it partly reflects the sun light falling on it
Reason : Moon is a satellite of earth. It does not emit light of its own
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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. |
A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes through the coil. When it is converted to a 10 A ammeter, the shunt resistance is
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(a) 0.01 W |
(b) 0.05 W |
(c) 2000 W |
(d) 5000 W |
Donor type impurity is found in
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(a) Trivalent elements |
(b) Pentavalent elements |
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(c) In both the above |
(d) None of these |
Mark the correct options:
The condition for observing Fraunhofer diffraction from a single slit is that the light wavefront incident on the slit should be
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(a) Spherical |
(b) Cylindrical |
(c) Plane |
(d) Elliptical |
A convex mirror has a focal length f. A real object is placed at a distance f in front of it from the pole produces an image at
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(a) Infinity |
(b) f |
(c) f/2 |
(d) 2f |