MHT-CET

Laws of Motion question bank (Physics)

Practice 110 free MHT-CET Physics - Laws of Motion questions with answers and step-by-step solutions.

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Q1.

If an electron is revolving around the hydrogen nucleus at a distance of $0.1 \mathrm{~nm}$, what should be its speed?

(A)
$2.188 \times 10^{6} \mathrm{~ms}^{-1}$
(B)
$1.094 \times 10^{6} \mathrm{~ms}^{-1}$
(C)
$4.376 \times 10^{6} \mathrm{~ms}^{-1}$
(D)
$1.59 \times 10^{6} \mathrm{~ms}^{-1}$
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Q2.

When a ceiling fan is switched off, its angular velocity falls to half while it makes 36 rotations. How many more rotations will it make before coming to rest?

(A)
24
(B)
36
(C)
18
(D)
12
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