Mechanical Properties of Solids — Physics STD 11 Science — Question

When source of sound moves towards a stationary observer, the wavelength of sound received by him

All the graphs below are intended to represent the same motion. One of them does it incorrectly. Pick it up.

A body of mass 50 kg is suspended using a spring balance inside a lift at rest. If the lift starts falling freely, the reading of the spring balance is

The moment of the couple is independent of

A mass 2 kg describes a circle of radius 1.0 m on a smooth horizontal table at a uniform speed. It is joined to the centre of the circle by a string, which can just withstand 32 N. The greatest number of revolutions per minute the mass can make is

A stone of mass 0.05 kg is thrown vertically upwards. What is the direction and magnitude of net force on the stone during its upward motion?

The drift current in a p-n junction is

Which of the following produces uniform electric field?

Thermistors are usually prepared from