Physics Test - ...

A coil having 100 turns and area of 0.001 m2is free to rotate about an axis. The coil is placed perpendicular to magnetic field of 1.0 wb⁄m2. The resistance of the coil is10$\Omega$.If the coil is rotated rapidly through an angle of 180^o, how much charge will flow through the coil?

Two electric bulbs rated P1watt V volt, and P2watt V volt are connected in parallel, and applied across V volt. The total power will be

Black body emits the radiation of maximum intensity 5000 A0, when its temperature is 12270C. If its temperature is increased by 10000C, what is the maximum intensity of emitted radiation?

The thermo emf produced in a thermocouple is 3μV/oC. If the temperature of the cold junction is 20oC and the thermo emf is 0.3 mV, the temperature of the hot junction is

Two particles start simultaneously from the same point and move along two straight lines, one with uniform velocity \(\vec{u}\) and the other from rest with uniform acceleration \(f\). Let \(\alpha\) be the angle between their directions of motion. The relative velocity of the

second particle w.r.t. first is least after a time of

Which of the following laws states that good absorbers of heat are good emitters?

A nucleus decays by \(\beta\) + emission, followed by \(\gamma\) -emission. If the atomic and mass numbers of the parent nucleus are \(Z\) and \(A\), respectively, then the corresponding numbers for the daughter nucleus are

An engine pumps up 100 kg of water through a height of 10 m in 5s. Given that the efficiency of engine is 60%. If g = 10 ms^-2, the power of the engine is :

Two bodies of masses m and 4m are moving with equal momentum. The ratio of their kinetic energy is

A force 'F' is given by F = at + bt2, where 't' is the time. What are the dimensions of 'a' and 'b', respectively?