Alpha particles consist of MCQ with Answer and Explanation

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Alpha particles consist of

A. Protons

B. Electrons

C. Helium nuclei

D. Neutrons

Answer: Option C

Solution (By JKSSB Mock Tests)

2 protons + 2 neutrons, charge +2e.

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Question #1

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Two resistors in series have equivalent 6 Ω, in parallel 4/3 Ω. Individual resistors are

A. 2 Ω and 4 Ω

B. 3 Ω and 3 Ω

C. 1 Ω and 5 Ω

D. 2 Ω and 2 Ω

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Correct Answer: Option A

Explanation:
Series: R1+R2=6. Parallel: (R1×R2)/(6)=4/3 => R1R2=8. Solving: R1,R2 = 2,4.

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Question #2

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The temperature of a body is 122°F. In Celsius it is

A. 122°C

B. 30°C

C. 90°C

D. 50°C

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Correct Answer: Option D

Explanation:
C = (122-32)×5/9 = 90×5/9 = 50°C.

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Question #3

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Two bodies of masses m and 2m are dropped from a height. Neglecting air resistance, which hits first?

A. m

B. Both same

C. 2m

D. Depends on height

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Correct Answer: Option B

Explanation:
Acceleration g same for all masses in vacuum.

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