In the circuit given, the correct relation to a balanced Wheatstone bridge is
|
(a) |
(b) |
(c) |
(d) None of these |
In the circuit given, the correct relation to a balanced Wheatstone bridge is
|
(a) |
(b) |
(c) |
(d) None of these |
(c)
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A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a
|
(a) Convex mirror of focal length 10 cm |
|
(b) Concave mirror of focal length 40 cm |
|
(c) Concave mirror of focal length 60 cm |
|
(d) Concave mirror of focal length 10 cm |
A moving coil sensitive galvanometer gives at once much more deflection. To control its speed of deflection
|
(a) A high resistance is to be connected across its terminals |
|
(b) A magnet should be placed near the coil |
|
(c) A small copper wire should be connected across its terminals |
|
(d) The body of galvanometer should be earthed |
Five equal resistances each of resistance R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be
|
(a) |
(b) |
(c) |
(d) |

The wavelength of yellow line of sodium is 5896 Å. Its wave number will be
|
(a) 50883 × 1010 per second |
(b) 16961 per cm |
|
(c) 17581 per cm |
(d) 50883 per cm |
The reason of current flow in P-N junction in forward bias is
|
(a) Drifting of charge carriers |
(b) Minority charge carriers |
|
(c) Diffusion of charge carriers |
(d) All of these |
