- ACoulomb.
- BVolt.
- CWatt.
- DJoule.
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A double convex lens of glass of m = 1.5 has radius of curvature of each of its surface is 0.2 m. The power of the lens is
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(a) + 10 dioptres |
(b) – 10 dioptres |
(c) – 5 dioptres |
(d) +5 dioptres |
A current i ampere flows in a circular arc of wire whose radius is R, which subtend an angle 3π/2 radian at its centre. The magnetic induction B at the centre is
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(a) |
(b) |
(c) |
(d) |
A glass slab is placed in the path of beam of convergent light. The point of convergence of light:
Assertion : A charged capacitor is disconnected from a battery. Now if its plate are separated farther, the potential energy will fall.
Reason : Energy stored in a capacitor is equal to the work done in charging it.
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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 assertion is false but reason is true. |
The binding energies per nucleon for a deuteron and an α- particle are x1 and x2 respectively. What will be the energy Q released in the reaction
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(a) 4 |
(b) 4 |
(c) 2( |
(d) 2 |
Band spectrum is characteristic of
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(a) Atoms |
(b) Molecules |
(c) Plasma |
(d) None of the above |