# 1500 Important Physics MCQ Question and Answer PDF

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

• AVolume
• BMomentum
• CTorque
• DChange in the rate of momentum

Momentum

Explanation:

• AVolume
• BTime
• CVelocity
• DForce

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

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

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

Hygrometer

Explanation:

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

### 6.The dimension [MLT-2] corresponds to

• AForce
• BWork done
• CAcceleration
• DVelocity

Force

Explanation:

The dimension [MLT-2] corresponds to Force.

### 7.Mist is caused by

• BIce at low temperature
• CWater vapour at low temperature
• DCarbon ? monoxide in solid form

Water vapour at low temperature

Explanation:

Mist is caused by Water vapour at low temperature.

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

• AForce
• BMomentum
• CImpulse
• DCatching time

Momentum

Explanation:

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

### 9.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

Parabolic

Explanation:

### 10.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

Diffusion

Explanation:

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

• AConduction
• BCondensation
• DInsolation

Explanation:

Clear nights are colder than cloudy nights because of Radiation.

### 12.If small raindrop falls through air

• AIts velocity goes on increasing
• BIts velocity goes on decreasing
• CIts velocity goes on increasing for sometime and then becomes constant
• DIt falls with constant speed for some time and then its velocity increases

Its velocity goes on increasing for sometime and then becomes constant

Explanation:

If small raindrop falls through air, Its velocity goes on increasing for sometime and then becomes constant.

### 13.A person standing at the middle point of a wooden ladder which starts slipping between a vertical wall and the floor of a room, while continuing to remain in a vertical plane. The path traced by a person standing at the middle point of the slipping ladder is

• AA straight line
• BAn elliptical line
• CA circular path
• DA parabolic path

A circular path

Explanation:

A person standing at the middle point of a wooden ladder which starts slipping between a vertical wall and the floor of a room, while continuing to remain in a vertical plane. The path traced by a person standing at the middle point of the slipping ladder is a circular path.

### 14.A ball is thrown upwards and it returns to ground describing a parabolic path. Which of the following remains constant?

• AKinetic energy of the ball
• BSpeed of the ball
• CHorizontal component of velocity
• DVertical component of velocity

Horizontal component of velocity

Explanation:

### 15.A passenger in a moving train tosses a five rupees coin. If the coin falls behind him, then the train must be moving with a uniform _____.

• AAcceleration
• BDeceleration
• CSpeed
• DVelocity

Acceleration

Explanation:

A passenger in a moving train tosses a five rupees coin. If the coin falls behind him, then the train must be moving with a uniform Acceleration.

### 16.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

Driving a car to cover a distance

Explanation:

### 17.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

Constant acceleration

Explanation:

### 18.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

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.

### 19.When pressure is increased, the melting point of ice

• AIncreases
• BDoes not change
• CDecreases
• DDepends on the impurities in the ice

Decreases

Explanation:

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

### 20.If the distance “S” covered by a moving car in rectilinear motion with a speed  “V” in time “T” is given by  S = VT, then the car undergoes

• AA uniform acceleration
• BA non-uniform acceleration
• CA uniform velocity
• DA non-uniform velocity