 # Physics MCQ Question and Answer

### 1.The dimension of which of the following is the same as that of impulse?

• AVolume
• BMomentum
• CTorque
• DChange in the rate of momentum
Correct Answer : (B)

Momentum

Explanation:

### 2.Which among the following is the fundamental quantity?

• AVolume
• BTime
• CVelocity
• DForce
Correct Answer : (B)

Time

Explanation:

### 3.What is the minimum escape velocity of rocket to be launched in to space?

• A5 km/sec
• B6 km/sec
• C11 km/sec
• D15 km/sec
Correct Answer : (C)

11 km/sec

Explanation:

The minimum escape velocity of rocket to be launched in to space is 11 km/sec. Escape velocity is defined as the speed at which an object travels to break free from either the planet’s or moon’s gravity and leave without any further propulsion.

### 4.Which set of conditions represents the easiest way to liquify a gas?

• ALow temperature and high pressure
• BHigh temperature and low pressure
• CLow temperature and low pressure
• DHigh temperature and high pressure
Correct Answer : (A)

Low temperature and high pressure

Explanation:

The easiest way to liquify a gas is at Low temperature and high pressure.

### 5.The instrument that measures and records the relative humidity air is

• AHydrometer
• BHygrometer
• CLactometer
• DBarometer
Correct Answer : (B)

Hygrometer

Explanation:

The instrument that measures and records the relative humidity air is Hygrometer.

### 6.Mist is caused by

• BIce at low temperature
• CWater vapour at low temperature
• DCarbon ? monoxide in solid form
Correct Answer : (C)

Water vapour at low temperature

Explanation:

Mist is caused by Water vapour at low temperature.

### 7.While catching a ball, a player pulls down his hands to lower the ?

• AForce
• BMomentum
• CImpulse
• DCatching time
Correct Answer : (B)

Momentum

Explanation:

While catching a ball, a player pulls down his hands to lower the Momentum.

### 8.A particle dropped from the top of a tower uniformly falls on ground at a distance which is equal to the height of tower. Which of the following paths will be traversed by the particle?

• ACircle
• BParabolic
• CGreat circle
• DHyper ? parabolic
Correct Answer : (B)

Parabolic

Explanation:

### 9.When a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is due to the phenomenon of  :

• A Evaporation
• BVaporisation
• CDiffusion
• DSublimation
Correct Answer : (C)

Diffusion

Explanation:

### 10.Clear nights are colder than cloudy nights because of

• AConduction
• BCondensation
• DInsolation
Correct Answer : (C)

Explanation:

Clear nights are colder than cloudy nights because of Radiation.

### 11.In which of the following cases, kinetic energy is being used in performing work?

• APadding the bicycle to cover a distance
• BDriving a car to cover a distance
• CWind mill grinding wheat grain
• DRowing a boat in the lake
Correct Answer : (B)

Driving a car to cover a distance

Explanation:

### 12.If the velocity ? time graph of a particle is represented by   y = mt + c, then the particle is moving with

• AConstant speed
• BConstant velocity
• CConstant acceleration
• DVarying acceleration
Correct Answer : (C)

Constant acceleration

Explanation:

### 13.A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to

• AOutward pull on him
• BInertia of motion
• CChange in momentum
• DChange in acceleration
Correct Answer : (B)

Inertia of motion

Explanation:

A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to Inertia of motion.

### 14.When pressure is increased, the melting point to ice

• AIncreases
• BDoes not change
• CDecreases
• DDepends on the impurities in the ice
Correct Answer : (C)

Decreases

Explanation:

When pressure is increased, the melting point to ice is Decreases.

### 15.Where are mesons found?

• ACosmic rays
• BX-rays
• CGamma rays
• DLaser beam
Correct Answer : (A)

Cosmic rays

Explanation:

Mesons are found in Cosmic rays.

### 16.For a body moving with non-uniform velocity and uniform acceleration

• ADisplacement ? Time graph is linear
• BDisplacement ? Time graph is  non ? linear
• CVelocity ? Time graph is  non ? linear
• DVelocity ? Time graph is  linear
Correct Answer : (B)

Displacement ? Time graph is  non ? linear

Explanation:

### 17.The fourth state of matter is known as

• AGas
• BVapour
• CPlasma
• DElectrons
Correct Answer : (C)

Plasma

Explanation:

The fourth state of matter is known as Plasma.

### 18.Knot is a measure of

• AThe speed of ship
• BThe curvature of spherical objects
• DIntensity of earthquake shock
Correct Answer : (A)

The speed of ship

Explanation:

Knot is a measure of The speed of ship.

### 19.Which of the following pairs of physical quantities have the same dimensions?

• AForce and power
• BWork and power
• CWork and energy
• DMomentum and power
Correct Answer : (C)

Work and energy

Explanation:

### 20.The instrument for measuring intensity of earthquake is called

• AEdiograph
• BPantagraph
• CErgograph
• DSeismograph
Correct Answer : (D)

Seismograph

Explanation:

The instrument for measuring intensity of earthquake is called Seismograph.