ICSE Class 10 Modern Physics — Mock Test (2027)

Free online mock test for Modern Physics (ICSE Class 10 Physics) — 20 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.Why is a very high temperature required for the process of nuclear fusion, and what is the approximate temperature needed?
   • A.To provide nuclei with enough kinetic energy to overcome electrostatic repulsion (≈ 10⁷ K).
   • B.To increase the gravitational force between nuclei and enable fusion (≈ 10⁵ K).
   • C.To slow down nuclei so they can bind together more easily (≈ 10³ K).
   • D.To ionize the atoms completely and create a plasma state (≈ 10⁴ K).
2. 2.Complete the following nuclear changes: (i) $$\frac{24}{11}\mathrm{Na} \longrightarrow \underline{\mathrm{Mg}} + \underline{0}\beta$$ (ii) $$\frac{238}{92}\mathrm{U} \longrightarrow \frac{234}{90}\mathrm{Th} + \frac{4}{?}\mathrm{He} + \mathrm{Energy}$$
3. 3.Which of the following is a correct list of three effects or applications of beta particles?
   • A.They produce X-rays when stopped by metals, cause fluorescence in materials, and penetrate skin causing biological damage.
   • B.They generate gamma rays on impact, create visible light in all materials, and are completely harmless to humans.
   • C.They ionize gases, produce alpha particles when absorbed, and are used in smoke detectors.
   • D.They reflect off surfaces like mirrors, cause chemical changes in plastics, and are stopped by paper.
4. 4.If 190 MeV energy is released due to fission of each nucleus of U-235, what mass of U-235 undergoes fission per hour in a reactor of power 300 MW? Take 1 a.m.u. = 1.66 × 10⁻²⁷ kg. Given: power of reactor = 300 MW = 300 × 10⁶ W
   • A.13.9 g
   • B.1.39 g
   • C.139 g
   • D.0.139 kg
5. 5.Which type of radiation has the highest ionising power?
   • A.Gamma radiation
   • B.Beta radiation
   • C.Alpha radiation
   • D.X-rays