The particle with highest ionising power is MCQ with Answer and Explanation

The particle with highest ionising power is
A. Neutron
B. Beta
C. Gamma
D. Alpha
Answer: Option D
Solution (By JKExamLibrary)
Alpha particles heavy, slow, high ionisation.

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Practice More Physics Questions

Question #1
In a transistor, the collector current is 1 mA and base current 10 μA. Emitter current is
A. 1.1 mA
B. 1.01 mA
C. 0.99 mA
D. 0.9 mA

Correct Answer: Option B


Explanation:
I_E = I_C + I_B = 1 mA + 0.01 mA = 1.01 mA.

This question belongs to: Science Physics
Question #2
The sparkling of a diamond is primarily due to:
A. Total internal reflection
B. Scattering
C. Dispersion
D. Interference

Correct Answer: Option A


Explanation:
Diamonds are cut in such a way that light entering them hits multiple facets from the inside at an angle greater than the critical angle (which is very low for diamond, around 24.4°). This results in multiple total internal reflections, trapping light and forcing it out of specific faces, creating a brilliant sparkle.

This question belongs to: Science Physics
Question #3
The number of electrons in one coulomb charge is approximately
A. 6.25 × 10¹⁸
B. 9.1 × 10⁻³¹
C. 6.25 × 10⁻¹⁹
D. 1.6 × 10⁻¹⁹

Correct Answer: Option A


Explanation:
Charge of electron e = 1.6 × 10⁻¹⁹ C. Number n = 1/e = 1/(1.6×10⁻¹⁹) = 6.25 × 10¹⁸. This is a huge number. Important for current (1 A = 1 C/s).

This question belongs to: Science Physics