Question
Average energy stored in a pure inductance L when a current i flows through it, is
|
(a) |
(b) |
(c) |
(d) |
Average energy stored in a pure inductance L when a current i flows through it, is
|
(a) |
(b) |
(c) |
(d) |
(d)
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If 3 charges are placed at the vertices of equilateral triangle of charge ‘q’ each. What is the net potential energy, if the side of equilateral ∆ is l cm
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(a) |
(b) |
(c) |
(d) |
In Young’s double slit experiment, a minimum is obtained when the phase difference of super imposing waves is
|
(a) Zero |
(b) (2n – 1)π |
(c) nπ |
(d) (n + 1) π |
Electric field strength due to a point charge of 5μC at a distance of 80 cm from the charge is
|
(a) |
(b) 7 |
(c) 5 |
(d) 4 |

When the length of a microscope tube increases, its magnifying power: