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 |
(b) 0.6
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
When there is an electric current through a conducting wire along its length, then an electric field must exist
|
(a) Outside the wire but normal to it |
(b) Outside the wire but parallel to it |
|
(c) Inside the wire but parallel to it |
(d) Inside the wire but normal to it |
The resistance of a conductor is 5 ohm at 50 oC and 6 ohm at 100 oC. Its resistance at 0 oC is
|
(a) 1 ohm |
(b) 2 ohm |
(c) 3 ohm |
(d) 4 ohm |
The main source of solar energy is
|
(a) Fission reactions |
(b) Fusion reactions |
|
(c) Chemical reactions |
(d) Combustion reactions |
Critical angle is that angle of incidence in the denser medium for which the angle of refraction in rarer medium is
|
(a) 0° |
(b) 57° |
(c) 90° | (d) 180° |
A power line lies along the east-west direction and carries a current of 10 ampere. The force per metre due to the earth's magnetic field of 
is
|
(a) |
(b) |
(c) |
(d) |
The angle of minimum deviation for a prism is 40° and the angle of the prism is 60°. The angle of incidence in this position will be
|
(a) 30° |
(b) 60° |
(c) 50° |
(d) 100° |
Two thin lenses of focal lengths 
and 
are in contact and coaxial. The combination is equivalent to a single lens of power
|
(a) |
(b) |
(c) |
(d) |
