Physics One-liner 1: SSC CGL CHSL MTS Free Study Materials PDF

1) What is the relative permeability of a paramagnetic material?

Greater than unity

2) By whom was Electron first identified?

J) J. Thomson

3) When will a hot body radiate maximum energy?

If its surface is black and rough

4) Which rays are most penetrating?

gamma-rays

5) Which common devices works based on the principle of mutual induction?

Transformer

6) Which variety of glass is heat resistant?

Pyrex glass

7) When the temperature increases, what does the angle of contact of a liquid?

Decreases

8) Which is the correct device for the detection of thermal radiation?

Thermopile

9) The refractive index of a given piece of transparent quartz is greatest for which light?

Violet light

10) If temperature rises, what will be the coefficient of viscosity of liquid?

Decreases

11) What is the unit of luminous efficiency of an electric bulb?

Lumen / watt

12) Which Indian missile can carry nuclear weapons?

Prithvi

13) What is the growth movement in plant due to light called?

Phototropism

14) How much is one barrel of oil approximately equal to?

159 litres

15) If the mass of the pendulum is doubled, what will it’s the time period?

Remains same

16) The hydraulic brakes used in automobiles is a direct application of which law?

Pascal’s law

17) A metal sheet with circular hole is heated. what change will be in the hole?

It will be shrined

18) Who invented Laser?

Charles H Townes

19) When was decimal coinage introduced in India?

1957

20) Which radiation carries maximum energy?

Gamma-rays 

21) The Laxman Era was started (in 1119 AD) by which dynasty?

Sens

22) Water vapour is turned into water droplets by which process?

Condensation

23) Mirage is observed in a desert due to the phenomenon of which reflection?

Total reflection

24) AT which °C water has full density?

4°C

25) Critical angle of light passing from glass to water is minimum for which colour?

Violet colour

26) What amount of energy transferred from one trophic level to next?

10%

27) Which would expand the most on being heated?

Air

28) A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole?

Decreases

29) What is the phenomenon of splitting white light into seven colours?

Dispersion

30) Critical angle is minimum when a light ray passes which thing?

Glass to air

31) What will be best colours for a Sun umbrella?

White on top and black on inside

32) Why is Weightlessness experienced in spaceship?

Due to absence of gravity

33) Which year is celebrated as International Year of Astronomy?

2009

34) The Resistance of Human body (dry condition) is the order of?

10000 Ohm

35) Newton’s Law of gravitation is defined by?

Newton

36) What is the unit of electrical conductivity?

Mho

37) Who discovered the link between electricity and magnetism?

Michel Faraday

38) Chemical Energy is converted into Electric Energy?

Battery

39) Tesla is the unit of Magnetic?

Induction

40) The substance having infinite electric resistance are called: Insulator