Physics Mcqs - Pak Mcqs Point

Most Important Physics Mcqs

1- A body is moving with uniform velocity. Which of the following statements is true ?

A. The body has uniform acceleration

B. The net force on the body is zero

C. The body is moving in a circular path

D. The body is accelerating

View Answer

Answer : B. The net force on the body is zero

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2- Newton’s first law of motion is also known as:

A. Law of Inertia

B. Law of Action-Reaction

C. Law of Momentum

D. Law of Acceleration

View Answer

Answer : A. Law of Inertia

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3- The acceleration due to gravity on the Moon is:

A. Equal to that on Earth

B. Greater than that on Earth

C. 1/6th of that on Earth

D. Twice that on Earth

View Answer

Answer : C. 1/6th of that on Earth

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4- If the distance between two masses is doubled, the gravitational force between them:

A. Remains the same

B. Becomes half

C. Doubles

D. Becomes one-fourth

View Answer

Answer : D. Becomes one-fourth

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5- The SI unit of electric current is:

A. Coulomb

B. Ohm

C. Volt

D. Ampere

View Answer

Answer : D. Ampere

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6- The device used to convert AC to DC is called:

A. Transformer

B. Rectifier

C. Inductor

D. Generator

View Answer

Answer : B. Rectifier

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7- The first law of thermodynamics is based on the principle of:

A. Conservation of energy

B. Conservation of mass

C. Conservation of momentum

D. Conservation of charge

View Answer

Answer : A. Conservation of energy

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8- Which of the following is an example of a heat engine ?

A. Refrigerator

B. Steam engine

C. Electric motor

D. Transformer

View Answer

Answer : B. Steam engine

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9- The speed of light is maximum in:

A. Water

B. Glass

C. Air

D. Vacuum

View Answer

Answer : D. Vacuum

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10- A convex lens is also known as a:

A. Diverging lens

B. Converging lens

C. Cylindrical lens

D. Planar lens

View Answer

Answer : B. Converging lens

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11- The energy of a photon is given by the equation:

A. E = hf

B. E = mc²

C. E = mv²

D. E = ½ mv²

View Answer

Answer : A. E = hf

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12- Which of the following particles has no charge ?

A. Electron

B. Proton

C. Neutron

D. Alpha particle

View Answer

Answer : C. Neutron

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13- A ball is thrown vertically upward. At the highest point, its velocity is:

A. Zero

B. Maximum

C. Minimum

D. Equal to acceleration due to gravity

View Answer

Answer : A. Zero

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14- The rate of change of momentum of a body is equal to:

A. Force

B. Velocity

C. Acceleration

D. Work done

View Answer

Answer : A. Force

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15- Work done is zero when:

A. The displacement is zero

B. The force is perpendicular to displacement

C. Both A and B

D. None of these

View Answer

Answer : C. Both A and B

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16- The SI unit of power is:

A. Joule

B. Newton

C. Volt

D. Watt

View Answer

Answer : D. Watt

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17- The force exerted by a fluid on a submerged body is called:

A. Gravitational force

B. Magnetic force

C. Buoyant force

D. Frictional force

View Answer

Answer : C. Buoyant force

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18- Bernoulli’s principle is based on the conservation of:

A. Energy

B. Mass

C. Momentum

D. Charge

View Answer

Answer : A. Energy

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19- The speed of sound is maximum in:

A. Steel

B. Water

C. Vacuum

D. Air

View Answer

Answer : A. Steel

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20- The unit of frequency is:

A. Joule

B. Newton

C. Hertz

D. Pascal

View Answer

Answer : C. Hertz

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