A p-n jucntion can be used to produce undamped e.m. oscillation. (True/false)

Colloids can be purified by peptization. (True/False)

The earth can be said to be a satellite of the Sun. true/false

'=' symbol used for congruence of triangles. (True/False)

Displacement current cannot produce magnetic field. (True/False)

Human proteins can be produced in the milk or semen of farm animals. True or False?

Identify True/False statements, Correct each false statement to make it true: Androgens are produced by Sertoli celIs. (True/ False)

A force can not change the shape of an object. (true/false)

Friction can be reduced by making a surface rough. true/ false