Mehran University Physics Past Papers 2025
MCQ 51
What is the Einstein Equation?
A) E = mc
B) E = mc²
C) E = mv²
D) E = F × d
Right option: B) E = mc²
MCQ 52
What is Ohm’s Law?
A) V = I / R
B) V = IR
C) V = R / I
D) V = I × R²
Right option: B) V = IR
MCQ 53
What is the unit of force?
A) Joule (J)
B) Newton (N)
C) Pascal (Pa)
D) Watt (W)
Right option: B) Newton (N)
MCQ 54
What is a couple force?
A) A single force acting on an object
B) A pair of forces that are equal in magnitude, opposite in direction, and not in line with each other
C) A pair of forces that are unequal in magnitude, same direction
D) A force that acts only on rigid bodies
Right option: B) A pair of forces that are equal in magnitude, opposite in direction, and not in line with each other
MCQ 55
What is the unit of heat?
A) Joule (J)
B) Watt (W)
C) Pascal (Pa)
D) Newton (N)
Right option: A) Joule (J)
MCQ 56
What is the unit of heat in C.G.S system?
A) Joule (J)
B) Calorie (cal)
C) Watt (W)
D) Newton (N)
Right option: B) Calorie (cal)
MCQ 57
What is the dimension of work?
A) [MLT⁻¹]
B) [ML²T⁻²]
C) [LT⁻¹]
D) [MT⁻²]
Right option: B) [ML²T⁻²]
MCQ 58
What is the unit of electric charge?
A) Ampere (A)
B) Coulomb (C)
C) Volt (V)
D) Ohm (Ω)
Right option: B) Coulomb (C)
MCQ 59
What is the unit of electric current?
A) Coulomb (C)
B) Ampere (A)
C) Volt (V)
D) Ohm (Ω)
Right option: B) Ampere (A)
MCQ 60
What is the unit of density?
A) Kilogram per meter cube (kg/m³)
B) Gram per centimeter cube (g/cm³)
C) Newton per meter cube (N/m³)
D) Joule per meter cube (J/m³)
MCQ 61
What is the change in Displacement with respect to time called?
A) Speed
B) Velocity
C) Acceleration
D) Distance
Right option: B) Velocity
MCQ 62
What happens when light goes from air to glass?
A) Reflection occurs
B) Refraction occurs
C) Diffraction occurs
D) Interference occurs
Right option: B) Refraction occurs
MCQ 63
What is the horizontal velocity of a projectile?
A) Increasing
B) Decreasing
C) Constant
D) Zero
Right option: C) Constant
MCQ 64
What type of quantity is velocity?
A) Scalar quantity
B) Vector quantity
C) Tensor quantity
D) None of the above
Right option: B) Vector quantity
MCQ 65
What is the rate of doing work or transferring energy called?
A) Energy
B) Power
C) Force
D) Work
Right option: B) Power
MCQ 66
What is the unit of surface tension?
A) Newton per meter (N/m)
B) Joule per meter (J/m)
C) Pascal (Pa)
D) Watt (W)
Right option: A) Newton per meter (N/m)
MCQ 67
What is Newton’s second law equation?
A) F = mv
B) F = ma
C) F = mv²
D) F = mg
Right option: B) F = ma
MCQ 68
What type of quantity is power?
A) Vector quantity
B) Scalar quantity
C) Tensor quantity
D) None of the above
Right option: B) Scalar quantity
MCQ 69
Who is credited with the discovery of the decimal point?
A) Isaac Newton
B) Albert Einstein
C) John Napier
D) Galileo Galilei
Right option: C) John Napier
MCQ 70
What is the unit of current density?
A) Ampere per meter (A/m)
B) Ampere per meter square (A/m²)
C) Volt per meter (V/m)
D) Ohm per meter (Ω/m)
MCQ 71
What is the relationship between specific heat and heat capacity?
A) C = m / c
B) C = mc
C) C = m²c
D) C = c / m
Right option: B) C = mc
MCQ 72
What is an object that is launched or thrown and then moves under the influence of gravity called?
A) Projectile
B) Trajectory
C) Orbit
D) Path
Right option: A) Projectile
MCQ 73
What does the 2nd law of thermodynamics state?
A) Energy can’t be created or destroyed
B) Entropy of the entire Universe will always increase over time
C) Heat transfer is always from higher to lower temperature
D) Work is done when force is applied
Right option: B) Entropy of the entire Universe will always increase over time
MCQ 74
What is the unit of magnetic flux?
A) Tesla (T)
B) Weber (Wb)
C) Volt-Second (V.s)
D) Both B and C
Right option: D) Both B and C
MCQ 75
What happens when static friction is applied to an object?
A) It starts moving
B) It accelerates
C) It remains stationary
D) It decelerates
Right option: C) It remains stationary
MCQ 76
What type of motion is characterized by to-and-fro movement?
A) Linear motion
B) Circular motion
C) Oscillatory motion
D) Rotational motion
Right option: C) Oscillatory motion
MCQ 77
What is the product of force and velocity called?
A) Work
B) Energy
C) Power
D) Momentum
Right option: C) Power
MCQ 78
What is the formula for angular velocity in a pendulum?
A) ω = √(g/L)
B) ω = √(L/g)
C) ω = g/L
D) ω = L/g
Right option: A) ω = √(g/L)
MCQ 79
What is the time period of a second pendulum?
A) 1 sec
B) 2 sec
C) 3 sec
D) 4 sec
Right option: B) 2 sec
MCQ 80
What type of quantity is pressure?
A) Vector quantity
B) Scalar quantity
C) Tensor quantity
D) None of the above
MCQ 81
What is the rate of change of linear momentum called?
A) Force
B) Energy
C) Power
D) Work
Right option: A) Force
MCQ 82
At what point is kinetic energy maximum in simple harmonic motion?
A) Mean position
B) Extreme point
C) Midpoint
D) None of the above
Right option: A) Mean position
MCQ 83
What is the unit of capacitance?
A) Farad (F)
B) Henry (H)
C) Ohm (Ω)
D) Watt (W)
Right option: A) Farad (F)
MCQ 84
What type of quantity is momentum?
A) Scalar quantity
B) Vector quantity
C) Tensor quantity
D) None of the above
Right option: B) Vector quantity
MCQ 85
What type of quantity is moment?
A) Scalar quantity
B) Vector quantity
C) Tensor quantity
D) None of the above
Right option: B) Vector quantity
MCQ 86
How many base quantities are there in physics?
A) 5
B) 6
C) 7
D) 8
Right option: C) 7
MCQ 87
What is the product of mass and velocity called?
A) Energy
B) Momentum
C) Power
D) Work
Right option: B) Momentum
MCQ 88
What happens to the speed of an object moving downward toward the earth due to gravity?
A) It decreases
B) It remains constant
C) It increases
D) It becomes zero
Right option: C) It increases
MCQ 89
What is the characteristic of work done in a conservative field?
A) Path-dependent
B) Path-independent
C) Time-dependent
D) Velocity-dependent
Right option: B) Path-independent
MCQ 90
How many components does a vector typically have in a 2D resolution?
A) 1 component
B) 2 components
C) 3 components
D) 4 components
MCQ 91
What is used to measure heat?
A) Thermometer
B) Calorimeter
C) Barometer
D) Hydrometer
Right option: B) Calorimeter
MCQ 92
What is a sonometer used for?
A) Measurement of pressure
B) Measurement of temperature
C) Measurement of frequency of vibrating string
D) Measurement of humidity
Right option: C) Measurement of frequency of vibrating string
MCQ 93
What happens to the apparent weight of a body in a lift moving upward with constant acceleration?
A) Less than its actual weight
B) Equal to its actual weight
C) Greater than its actual weight
D) Zero
Right option: C) Greater than its actual weight
MCQ 94
What is the unit of magnetic flux?
A) Tesla (T)
B) Weber (Wb)
C) Ampere (A)
D) Volt (V)
Right option: B) Weber (Wb)
MCQ 95
What is the formula for linear momentum?
A) P = mv²
B) P = mv
C) P = F × t
D) P = E / t
Right option: B) P = mv
MCQ 96
What is the energy of a photon directly proportional to?
A) Wavelength
B) Frequency
C) Speed
D) Amplitude
Right option: B) Frequency
MCQ 97
What is the typical trajectory of a projectile motion in the absence of air resistance?
A) Circle
B) Ellipse
C) Parabola
D) Hyperbola
Right option: C) Parabola
MCQ 98
What is the characteristic of a negative vector?
A) Same magnitude and same direction
B) Same magnitude but opposite direction
C) Different magnitude and same direction
D) Different magnitude and opposite direction
Right option: B) Same magnitude but opposite direction
MCQ 99
What does the slope of a velocity-time graph represent?
A) Displacement
B) Acceleration
C) Speed
D) Distance
Right option: B) Acceleration
MCQ 100
What is the energy produced by force and displacement called?
A) Kinetic energy
B) Potential energy
C) Work done
D) Power
Right Option: C) Work Done
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