NAT I Engineering Physics MCQs With Answers

What is the ratio of r.m.s velocity for O₂ to H₂?

Which of the following four statements is false?

The dimensional formula for the modulus of elasticity is same as that for.

Radio waves of constant amplitude can be generated with

Relation between pressure (P) and energy (E) of a gas is

When a Na ion and a CI ion are placed in air a force F acts between them when they are separated by a distance of 1 cm from each other the permittivity of air and the dielectric constant of water are ε₀ and K respectively When a piece of salt is placed in water then the force between Na⁺ and CI^- ions separated by a distance of 1 cm will be

When we apply reverse bias to a junction diode it

If the dot product of two non-zero vectors vanishes the vectors will be

A point charge Q is placed at the mid-point of a line joining two charges 4q and q. if the net force on charge q is zero. then Q must be equal to

In an AC circuit a resistance of R ohm i connected in series with an inductance L if phase angle between voltage and current be 45^o the value of inductive reactance will be

In an ac circuit with voltage V and current 1 the power dissipated is