10th Class Physics MCQS Chapter 6

A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.

60 V

45 V

30 V

0 V

When an electric current passes through a conductor, which field is produced around it?

Gravitational field

Electrostatic field

Electric field

Magnetic field

The end of solenoid from which lines of force emerge out is called:

None of these

North pole

North and south pole

South pole

An object gains excess negative charge after being rubbed against another object, which is:

Either, a, b or c

Negatively charged

Neutral

Positively charged

In NOT gate number of input terminals is/are:

4

2

1

3

Transformer which increase voltage is called.

Step down transformer

D.C.Moter

Step-up transformer

A.C.genrator

The refracted light striking to the side of prism is called:

Incident ray

Refracted ray

Reflected ray

Emergent ray

Transformer Works on the principle of:

Induction

Self induction

Electro statatic

Mutual induction

According to Fleming’s left hand rule the direction of force on the conductor is given by:

Middle finger

Fore finger

Thumb

None of these

Who discovered Electromagnetic induction?

Coulomb

Flemiing

Ohm

Michael Faraday