PHYSICS QUIZ | EXAMIANS

Curie point is the temperature at which

Transmutation of metal occurs.

A metal loses magnetic properties.

A metal loses conductivity

Matter becomes radioactive

TRUE ANSWER : ?
YOUR ANSWER : ?

In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ?

Visible

Ultraviolet

Infrared

X-ray

TRUE ANSWER : ?
YOUR ANSWER : ?

When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon is known as

Beats

Echo

Doppler effect

Resonance

TRUE ANSWER : ?
YOUR ANSWER : ?

A small gap is left at the joints of rails in a railway track to

Avoid the tracks being distorted due to seasonal temperature variation

Keep the rails equidistant

Control the speed of train

Avoid the heating of tracks to high temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Electric power is measured in units of

Joule

Ampere

Watt

Volt

TRUE ANSWER : ?
YOUR ANSWER : ?

Total number of colours exists in sunlight

10

9

5

7

TRUE ANSWER : ?
YOUR ANSWER : ?

A photo-electric cell converts

Light energy to electrical energy

Light energy to chemical energy

Mechanical energy to electric energy

Heat energy to mechanical energy

TRUE ANSWER : ?
YOUR ANSWER : ?

Damp clothes are dried in spin dryers by the action of

Central forces

Centripetal forces

Centrifugal forces

Non central forces

TRUE ANSWER : ?
YOUR ANSWER : ?

A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?

The liquid surface falls down on the direction of motion and rises up on the back side of the tank

The liquid surface falls down only at the center of the tank

The surface of the liquid remains horizontal

None

TRUE ANSWER : ?
YOUR ANSWER : ?

It is dangerous to observe Solar eclipse with naked eyes because

Cosmic rays reach eyes more during the eclipse

Ultraviolet radiations from Sun burn our retina

Infrared radiations from sun burn our retina

All radiations from sun initiate chemical reactions in eyes

TRUE ANSWER : ?
YOUR ANSWER : ?