L Science Practice Set 20 | Interactive MCQ Mock Test

1. Pendulum length increased 2%, time period

Science 📄 HPTET (2025)

A. 0.02 B. -0.02 C. 0.01 D. -0.01

2. Sound wave y = 0.0015 sin (62.8x + 314t), wavelength

Science 📄 HPTET (2025)

A. 0.1 B. 0.2 C. 0.3 D. None

3. Watch taken to moon will

Science 📄 HPTET (2025)

A. No change B. Not work C. Runs slowly D. Runs faster

4. he work done in placing a charge of 8×10⁻¹⁸ C on a capacitor of 100 microfarad is

Science 📄 HPTET (2025)

A. 6×10⁻³² J B. 3.1×10⁻²⁶ J C. 4×10⁻¹⁰ J D. 32×10⁻³² J

5. Torque acting on electric dipole of dipole moment p placed in uniform electric field E is

Science 📄 HPTET (2025)

A. p × E B. p . E C. p × (E × p) D. p . E / p²

6. The energy stored in a capacitor of capacitance C and potential V

Science 📄 HPTET (2025)

A. ½ C²V B. ½ V²C C. ½ CV D. ½ C²V²

7. In bringing one electron towards another, the electrostatic potential energy

Science 📄 HPTET (2025)

A. increases B. decreases C. remains same D. becomes zero

8. If length and radius of a wire are both doubled, resistance of the wire becomes

Science 📄 HPTET (2025)

A. resistance doubled & resistivity halved B. resistance halved & resistivity same C. resistance halved & resistivity doubled D. both unchanged

9. If an ammeter is used instead of a voltmeter, it must be connected

Science 📄 HPTET (2025)

A. low resistance in parallel B. high resistance in parallel C. very high resistance in series D. low resistance in series

10. Electromagnets are made of soft iron because soft iron has

Science 📄 HPTET (2025)

A. high retentivity & high coercivity B. low retentivity & low coercivity C. high retentivity & low coercivity D. low retentivity & high coercivity

11. The core of a transformer is laminated to

Science 📄 HPTET (2025)

A. prevent rusting B. minimize eddy current loss C. increase voltage ratio D. reduce weight

12. Speed of electromagnetic waves in vacuum is

Science 📄 HPTET (2025)

A. ε₀ μ₀ B. √(ε₀ μ₀) C. 1/√(ε₀ μ₀) D. 1/ε₀ μ₀

13. Speed of light in water (n=1.33)

Science 📄 HPTET (2025)

A. 3×10⁸ B. 2.26×10⁸ C. 4×10⁸ D. 1.33×10⁸

14. In refraction, light bends because

Science 📄 HPTET (2025)

A. frequency changes B. elasticity changes C. speed of light changes D. amplitude decreases

15. Sir C.V. Raman got Nobel Prize for which phenomenon?

Science 📄 HPTET (2025)

A. Scattering B. Diffraction C. Interference D. Polarization

16. A photon has energy E, velocity c and frequency ν, which represents its wavelength?

Science 📄 HPTET (2025)

A. hc/E B. hν/c C. hν/c² D. hν

17. If half-life of a radioactive substance is 225.8 min, decay constant is

Science 📄 HPTET (2025)

A. 3.1×10⁻³ min⁻¹ B. 3.1×10⁻⁴ min⁻¹ C. 3.1×10⁻⁶ min⁻¹ D. 3.1×10⁻⁹ min⁻¹

18. Which is used as moderator in nuclear reactor?

Science 📄 HPTET (2025)

A. Cadmium B. Plutonium C. Uranium D. Heavy water

19. Which impurity produces N-type semiconductor when added to silicon?

Science 📄 HPTET (2025)

A. Phosphorus B. Aluminium C. Magnesium D. Both (B) & (C)

20. What type of stoichiometric defect is shown by ZnS?

Science 📄 HPTET (2025)

A. Frenkel defect B. Metal excess defect C. Schottky defect D. Metal deficiency defect

21. In ideal solutions, enthalpy change ΔmixH is

Science 📄 HPTET (2025)

A. ΔmixH > 1 B. ΔmixH < 1 C. ΔmixH = 0 D. ΔmixH ≥ 1

22. Colligative property used to find molar mass of polymers & proteins

Science 📄 HPTET (2025)

A. Depression in freezing point B. Relative lowering of vapour pressure C. Elevation in boiling point D. Osmotic pressure

23. Effect of temperature on Henry’s constant KH

Science 📄 HPTET (2025)

A. Increases B. Decreases C. Remains constant D. Decrease then increase

24. Pressure of H₂ to make H₂-electrode potential zero at 298 K

Science 📄 HPTET (2025)

A. 10⁻¹⁰ atm B. 10⁻⁴ atm C. 10⁻¹⁴ atm D. 10⁻¹² atm

25. Unit of rate constant K for first-order reaction

Science 📄 HPTET (2025)

A. mol L⁻¹ s⁻¹ B. s⁻¹ C. L mol⁻¹ s⁻¹ D. L² mol⁻² s⁻¹

Ladakh Science - Practice Mock Test Set 20

📊 Live Score Summary

Quick Navigation Links

Boost Your Ladakh Science Exam Preparation