10th Class Physics MCQS Chapter 6

When we heat the metal at high temperature they emit:

Protons

Electrons

Neutrons

Holes

In A.C. generator flux will be zero if coil is to the field.

Inclined

90^o

45^o

Parallel

In electric motor, the brushes are made of:

Lead

Iron

Wood

Graphite

A converging lens becomes a magnifying glass when an object is placed:

Equal of focal length

At double of focal length

Outside of focal length

Inside the focal length

Totally reflecting prism is used in:

Telescope

Periscope and binocular

Periscope

Binoculars

When a current carrying conductor is placed in magnetic field at right angle to it. The direction of force acting upon it is:

At right angle to both the field and the current.

Opposite the direction of field

Makes an angle of 45^owith the current

The same as direction of field

The magnetic field of a solenoid resembles as:

Iron wire

Bar magnet

U shape magnet

Point charge.

According to Fleming’s left hand rule the direction of magnetic field is indicated by:

Forefinger

Thumb

Right hand rule

Middle finger

A positive electric charge:

Repels a neutral charge

Attracts other positive charge

Attract a neutral charge

Repels other positive charge

One micro coulomb charge is equal to:

10⁶c

10³c

10^-6c

10 ³c