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Physics MCQs

225 Questions Subject Test
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Practice core concepts of measurement, motion, force, energy, waves, electricity, magnetism and modern physics.

MechanicsWavesElectricityModern Physics
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Which type of radiation consists of helium nuclei emitted from an unstable nucleus?

  • A Alpha radiation
  • B Beta radiation
  • C Gamma radiation
  • D Neutron radiation
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Which scientist is credited with discovering the law of universal gravitation?

  • A Albert Einstein
  • B Galileo Galilei
  • C Isaac Newton
  • D Johannes Kepler
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A fuse in an electrical circuit is used to:

  • A Protect the circuit from excessive current
  • B Store electrical energy
  • C Increase voltage
  • D Convert AC to DC
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The center of mass of a uniform rod lies at:

  • A One end
  • B It has no definite center of mass
  • C Three-fourths of its length
  • D The midpoint
45
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

What is the working principle of a hydraulic press?

  • A Pascal's law
  • B Archimedes' principle
  • C Bernoulli's principle
  • D Newton's third law
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Which type of mirror is used in vehicle headlights?

  • A Concave mirror
  • B Convex mirror
  • C Plane mirror
  • D Cylindrical mirror
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A concave lens is also known as a:

  • A Diverging lens
  • B Converging lens
  • C Plane lens
  • D Bifocal lens
48
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A light-emitting diode (LED) converts electrical energy into:

  • A Chemical energy
  • B Sound energy
  • C Light energy
  • D Mechanical energy
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Bernoulli's theorem is based on the conservation of:

  • A Energy
  • B Mass
  • C Charge
  • D Momentum
50
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What is the phenomenon where two waves superpose to produce regions of maximum and minimum intensity?

  • A Interference
  • B Diffraction
  • C Refraction
  • D Polarisation
51
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Which type of electromagnetic radiation is used in microwave ovens to heat food?

  • A Microwaves
  • B X-rays
  • C Gamma rays
  • D Ultraviolet rays
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The number of complete waves passing a point per second is called:

  • A Wavelength
  • B Frequency
  • C Amplitude
  • D Wave speed
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Quantum mechanics primarily deals with the behavior of:

  • A Macroscopic objects
  • B Large celestial bodies
  • C Subatomic particles
  • D Fluids in motion
54
Medium fpsc ppsc nts Uploaded: 13 Jul 2026

Which law states that the current through a conductor is directly proportional to the voltage across it?

  • A Faraday's Law
  • B Ohm's Law
  • C Kirchhoff's Law
  • D Coulomb's Law
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What is the term for the number of protons found in the nucleus of an atom?

  • A Mass number
  • B Atomic mass
  • C Isotope number
  • D Atomic number
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Which mirror is used as a rear-view mirror in vehicles?

  • A Plane mirror
  • B Cylindrical mirror
  • C Convex mirror
  • D Concave mirror
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The transfer of heat through fluids due to the actual movement of the fluid particles is called:

  • A Conduction
  • B Radiation
  • C Insulation
  • D Convection
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What is the term for the tendency of a body to resist changes in its rotational motion?

  • A Angular velocity
  • B Moment of inertia
  • C Torque
  • D Angular momentum
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What is the term for the electrical potential difference between two points in a circuit?

  • A Current
  • B Resistance
  • C Voltage
  • D Power
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Medium fpsc ppsc nts Uploaded: 13 Jul 2026

What is the formula for gravitational potential energy?

  • A half mv squared
  • B mgh
  • C Fxd
  • D mv
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