Physics Test - ...

Candela is the unit of _________.

Which transition emits light of lower frequency?

A circular road of 1000 m radius has a banking angle of 45°, the maximum safe speed of a car having a mass of 2000 kg will be (if the coefficient of friction between tyre and road is 0.5):

Which of the following is correct for entropy of an isolated system?

A liquid is filled in two different vessels as shown in the figure. Both vessels have equal heights.

Which of the following is correct?

A force (F) acting on a particle is such that F is inversely proportional to the distance covered. The work done by the force in moving the particle from point 'a' to point 'b' is proportional to:

If momentum is increased by \(20 \%\), then kinetic energy increases by:

To mop-clean a floor, a cleaning machine presses a circular mop of radius R vertically down with a total force F and rotates it with a constant angular speed about its axis. If the force F is distributed uniformly over the mop and if coefficient of friction between the mop and the floor is μ, the torque applied by the machine on the mop is-

A toroidal solenoid has $3000$ turns and a mean radius of $10 cm$. It has a soft iron core of relative permeability $2000$. What is the magnitude of the magnetic field in the core, when a current of $1 A$ is passed through the solenoid?

A car starting from rest is accelerated at a constant rate \(\alpha\) until it attains a speed \(v\). It is then retarded at a constant rate \(\beta\) until it comes to rest. The average speed of the car for its entire journey is: