Physics Tnpsc interview questions – page 2

Lightning conductor was first constructed by

1. Edison
2. Newton
3. Franklin
4. Volta

The force between two unlike charges is ___

1. repulsive or attractive
2. repulsive
3. attractive
4. nil

The compressions and rarefactions are produced in

1. electromagnet waves
2. heat
3. sound
4. light

In ____ sound can be produced by striking one object with another.

1. veena
2. tabla
3. guitar
4. flute

Sound of frequencies greater than 20,000 Hz are known as ___

1. ultrasonic
2. inaudible sound
3. infrasonic
4. audible range of frequency

The vocal cords of women and children are ____ than that of men.

1. smaller
2. thicker
3. thinner
4. larger

Superconductivity results when matter is

1. subjected to very low pressure
2. heated to very high temperature
3. compressed to very high pressure
4. cooled to very low temperature

The good conductor of heat energy is ____

1. rubber
2. Iron
3. mica
4. glass

In the electric oven electric power is converted into ___ energy.

1. magnetic
2. sound
3. light
4. heat

The liquid used in doctors thermometer is

1. kerosene
2. mercury
3. water
4. alcohol

The change of a solid into a liquid on heating is called ___

1. condensation
2. melting
3. evaporation
4. freezing

The S.I. unit of time is

1. day
2. hour
3. second
4. minute

The density of sea water is

1. 800 kg-3
2. 920 kg-3
3. 1000 kg-3
4. 1026 kg-3

The mass per unit volume of a substance is called

1. force
2. area
3. density
4. force

Liquids do not have definite

1. shape
2. volume
3. mass
4. density

The amount of surface occupied by an object is called

1. area
2. volume
3. diameter
4. length

The Nobel Prize started Alfred Nobel, who had invented

1. Safety Lamp
2. Telephone
3. Dynamite
4. Aircraft

If the zero of the head scale lies below the pitch scale, the error is ____

1. Zero error
2. Positive error
3. Negative error
4. All of these

Transfer of heat in solid substance occurs through the process is called ___

1. convection
2. conduction
3. radiation
4. diffusion

The amount of heat energy 1 calorie is equal to ____

1. 42 joule
2. 0.42 joule
3. 4.2 joule
4. 4200 joule

A glass rod rubbed with ____ acquires positive charges.

1. wool
2. cotton
3. metal
4. silk

Two upper ends of the tuning fork are called ___

1. sonometer
2. frequency
3. prongs
4. stem

If the vibrating length is short, it will produce ___ sound.

1. inaudible
2. uniform
3. low pitched
4. high pitched

In a periscope, ___ mirrors are used.

1. plane
2. spherical
3. convex
4. concave

In which one among the following is the speed of sound maximum?

1. Air at 0 deg C
2. Air at 100 deg C
3. Wood
4. Water

The material which do not conduct electric charges is

1. silver
2. mica
3. copper
4. graphite

The audible frequency range is _____

1. above 70,000 Hz
2. below 20 Hz
3. above 20,000 Hz
4. between 20 Hz and 20,000 Hz

Sound cannot travel through ____

1. vacuum
2. gases
3. liquids
4. solids

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

1. will increases first and then decrease
2. remain constant
3. decreases
4. increases

Which of the following is a paramagnetic?

1. Copper
2. Cobalt
3. Nickel
4. Chromium