A 10 ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
|
(a) 1310 W |
(b) 670 W |
(c) 810 W |
(d) 1210 W |
(d) 1210 W
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Kinetic energy of emitted cathode rays is dependent on
|
(a) Only voltage |
|
(b) Only work function |
|
(c) Both (a) and (b) |
|
(d) It does not depend upon any physical quantity |
The current in the given circuit is
|
(a) 0.1 A |
(b) 0.2 A |
(c) 0.3 A |
(d) 0.4 A |
In which of the following ionic bond is present
|
(a) NaCl |
(b) Ar |
(c) Si |
(d) Ge |
The radius of the convex surface of plano-convex lens is 20 cm and the refractive index of the material of the lens is 1.5. The focal length of the lens is
|
(a) 30 cm |
(b) 50 cm |
(c) 20 cm |
(d) 40 cm |
