Physics Mcqs Page 3 - Pak Mcqs Point

Most Important Physics Mcqs

41- The image formed by a plane mirror is always:

A. Virtual and erect

B. Real and inverted

C. Enlarged and real

D. Diminished and real

View Answer

Answer : A. Virtual and erect

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42- The focal length of a convex lens is:

A. Positive

B. Negative

C. Zero

D. Infinite

View Answer

Answer : A. Positive

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43- The mass-energy equivalence principle was given by:

A. Newton

B. Planck

C. Maxwell

D. Einstein

View Answer

Answer : D. Einstein

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44- The unit of radioactive decay is:

A. Hertz

B. Tesla

C. Becquerel

D. Newton

View Answer

Answer : C. Becquerel

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45- The SI unit of acceleration is:

A. m/s

B. m/s²

C. m²/s

D. m³/s²

View Answer

Answer : B. m/s²

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46- A projectile follows a:

A. Circular path

B. Parabolic path

C. Straight-line path

D. Elliptical path

View Answer

Answer : B. Parabolic path

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47- The area under a velocity-time graph represents:

A. Acceleration

B. Displacement

C. Momentum

D. Force

View Answer

Answer : B. Displacement

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48- Which of the following has the greatest inertia ?

A. A football

B. A tennis ball

C. A bicycle

D. A truck

View Answer

Answer : D. A truck

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49- The energy stored in a stretched spring is:

A. Potential energy

B. Kinetic energy

C. Chemical energy

D. Heat energy

View Answer

Answer : A. Potential energy

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50- One horsepower is equal to:

A. 100 watts

B. 500 watts

C. 746 watts

D. 1000 watts

View Answer

Answer : C. 746 watts

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51- The principle of buoyancy was discovered by:

A. Pascal

B. Archimedes

C. Newton

D. Bernoulli

View Answer

Answer : B. Archimedes

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52- The pressure exerted by a liquid at a given depth depends on:

A. Surface area of the liquid

B. Volume of the liquid

C. Density and depth of the liquid

D. Shape of the container

View Answer

Answer : C. Density and depth of the liquid

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53- The human ear can hear sounds in the frequency range of:

A. 0 – 100 Hz

B. 20 – 20,000 Hz

C. 200 – 200,000 Hz

D. 2,000 – 200,000 Hz

View Answer

Answer : B. 20 - 20,000 Hz

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54- The phenomenon of increase in amplitude when two waves of the same frequency meet in phase is called:

A. Reflection

B. Refraction

C. Interference

D. Resonance

View Answer

Answer : D. Resonance

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55- Ohm’s law states that:

A. Voltage is proportional to current

B. Voltage is proportional to resistance

C. Current is proportional to resistance

D. Power is proportional to current

View Answer

Answer : A. Voltage is proportional to current

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56- The SI unit of resistance is:

A. Coulomb

B. Ampere

C. Ohm

D. Volt

View Answer

Answer : C. Ohm

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57- The absolute zero temperature is:

A. 0°C

B. -273.15°C

C. 273.15°C

D. -100°C

View Answer

Answer : B. -273.15°C

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58- The process of heat transfer that does not require a medium is:

A. Convection

B. Conduction

C. Radiation

D. None of these

View Answer

Answer : C. Radiation

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59- The lens used to correct myopia (short-sightedness) is:

A. Bifocal lens

B. Cylindrical lens

C. Convex lens

D. Concave lens

View Answer

Answer : D. Concave lens

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60- The speed of light in glass is:

A. Equal to the speed in vacuum

B. Less than the speed in vacuum

C. Greater than the speed in vacuum

D. Infinite

View Answer

Answer : B. Less than the speed in vacuum

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