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Figure shows the electric lines of force emerging from a charged body. If the electric field at A and B are and
respectively and if the displacement between A and B is r then
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(a) |
(b) |
(c) |
(d) |
In the given figure, when galvanometer shows no deflection, the current (in ampere) flowing through 5Ω resistance will be
|
(a) 0.5 |
(b) 0.6 |
(c) 0.9 |
(d) 1.5 |
There is no atmosphere on moon because
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(a) There is no vegetation |
|
(b) The escape velocity at its surface is very low |
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(c) Diffusion constant of gases is high |
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(d) There is vacuum in space |
A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10–7 ohm–meter and the current passing through it is 0.1 ampere; cross-section of the wire is 10–6 m2. The potential gradient along the potentiometer wire is
|
(a) |
(b) |
(c) |
(d) |
A coil having 500 square loops each of side 10 cm is placed normal to a magnetic flux which increases at the rate of 1.0 tesla/second. The induced e.m.f. in volts is
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(a) 0.1 |
(b) 0.5 |
(c) 1 |
(d) 5 |
The two ends of a uniform conductor are joined to a cell of e.m.f. E and some internal resistance. Starting from the midpoint P of the conductor, we move in the direction of current and return to P. The potential V at every point on the path is plotted against the distance covered (x). Which of the following graphs best represents the resulting curve
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(a) |
(b) |
(c) |
(d) |