Class 12 Physics Practice Questions

18 free practice MCQs for Class 12 Physics, following the school syllabus — playable as an adaptive quiz in English, Hindi, Tamil, Telugu, Bengali and 8 more Indian languages. No sign-up, no ads.

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Sample questions with answers

Q1. Coulomb's law gives the force between two point charges. The force is: ⚡

  1. Proportional to the cube of distance
  2. Inversely proportional to the square of distance
  3. Independent of distance
  4. Proportional to distance
Show answer

B. Inversely proportional to the square of distance

Q2. Ohm's law states that V = IR, where R is: ⚡

  1. Reactance
  2. Ratio of capacitance
  3. Resistivity
  4. Resistance
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D. Resistance

Q3. Which phenomenon is responsible for the blue colour of the sky? ⚡

  1. Refraction
  2. Reflection
  3. Diffraction
  4. Scattering (Rayleigh)
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D. Scattering (Rayleigh)

Q4. The unit of electric charge is: ⚡

  1. Farad
  2. Ampere
  3. Coulomb
  4. Volt
Show answer

C. Coulomb

Q5. Which lens is used to correct myopia (short-sightedness)? ⚡

  1. Concave lens
  2. Cylindrical lens
  3. Convex lens
  4. Bifocal lens
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A. Concave lens

Q6. The energy of a photon is given by: ⚡

  1. E = mc²
  2. E = hf
  3. E = ½mv²
  4. E = qV
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B. E = hf

Q7. Capacitors connected in parallel have the same: ⚡

  1. Charge
  2. Voltage
  3. Capacitance
  4. Current
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B. Voltage

Q8. Total internal reflection occurs when light travels from: ⚡

  1. Rarer to denser medium at any angle
  2. Denser to rarer medium beyond critical angle
  3. Along the normal
  4. Rarer to rarer medium
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B. Denser to rarer medium beyond critical angle

Q9. Which of the following has the highest frequency? ⚡

  1. Radio waves
  2. Gamma rays
  3. Visible light
  4. X-rays
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B. Gamma rays

Q10. Resistors connected in series have the same: ⚡

  1. Current
  2. Power
  3. Resistance
  4. Voltage
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A. Current

Q11. What is the SI unit of electric current?

  1. Ampere
  2. Ohm
  3. Volt
  4. Coulomb
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A. Ampere

Q12. What is the SI unit of electrical resistance?

  1. Ampere
  2. Ohm
  3. Volt
  4. Farad
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B. Ohm

Q13. What is the SI unit of electric potential difference?

  1. Ampere
  2. Ohm
  3. Volt
  4. Coulomb
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C. Volt

Q14. What is the SI unit of electric charge?

  1. Ampere
  2. Volt
  3. Ohm
  4. Coulomb
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D. Coulomb

Q15. Which subatomic particle carries a positive charge?

  1. Proton
  2. Electron
  3. Neutron
  4. Photon
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A. Proton

Q16. Which type of lens converges parallel rays of light to a point?

  1. Concave lens
  2. Convex lens
  3. Plane mirror
  4. Prism
Show answer

B. Convex lens

Q17. What is the SI unit of power?

  1. Volt
  2. Ampere
  3. Watt
  4. Ohm
Show answer

C. Watt

Q18. What is the SI unit of energy?

  1. Newton
  2. Watt
  3. Ampere
  4. Joule
Show answer

D. Joule

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