When a current of 1 ampere is passed through a conductor whose ends are maintained at temperature difference of 1 ℃, the amount of heat evolved or absorbed is called
|
(a) Peltier coefficient |
(b) Thomson coefficient |
|
(c) Thermoelectic power |
(d) Thermo e.m.f. |
(b) Thomson coefficient
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A bar magnet of length 10 cm and having the pole strength equal to 10–3 weber is kept in a magnetic field having magnetic induction (B) equal to 
Tesla. It makes an angle of 30o with the direction of magnetic induction. The value of the torque acting on the magnet is
(
|
(a) 2π |
(b) 2 π |
(c) 0.5 N |
(d) 0.5 |
Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by 2pl radian. If there is a maximum in direction D the distance XO using n as an integer is given by
|
(a) |
(b) |
(c) |
(d) |
Infrared radiation was discovered in 1800 by
|
(a) William Wollaston |
(b) William Herschel |
(c) Wilhelm Roentgen |
(d) Thomas Young |
When the current through a solenoid increases at a constant rate, the induced current
|
(a) Is constant and is in the direction of the inducing current |
|
(b) Is a constant and is opposite to the direction of the inducing current |
|
(c) Increases with time and is in the direction of the inducing current |
|
(d) Increases with time and opposite to the direction of the inducing current |
Equivalent resistance between A and B will be
|
(a) 2 ohm |
(b) 18 ohm |
(c) 6 ohm |
(d) 3.6 ohm |
