Everyday Science · Physics in Everyday Life · page 4 of 5

Everyday Science misc (127) MCQs with Answers

Includes 3 past paper MCQs (marked).

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Miscellaneous MCQs (31–40)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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31.
The unit of decay constant is ?
Correct Answer: B. s⁻¹
One-liner
The unit of decay constant is s⁻¹ (per second).
32.
Which equation correctly represents Heisenberg's uncertainty principle?
Correct Answer: D. Δx · Δp ≥ ħ / 2
One-liner
Heisenberg's uncertainty principle is mathematically expressed as Δx · Δp ≥ ħ / 2, where Δx is the uncertainty in position and Δp is the uncertainty in momentum.
33.
Which hydraulic structure is designed to raise or lower boats between water levels in a canal or river?
Correct Answer: C. Lock
One-liner
A lock is a hydraulic structure used to raise or lower boats between stretches of water of different levels on canal and river waterways.
34.
The frequency of waves produced in a microwave oven is
Correct Answer: D. 2450 MHz
One-liner
The frequency of waves produced in a microwave oven is 2450 MHz.
35.
What is the charge of beta particles in nuclear radiation?
Correct Answer: B. Negatively charged
One-liner
Beta particles are negatively charged electrons emitted from the nucleus during beta decay.
36.
Liquids are denser than gases due to ?
Correct Answer: A. Small intermolecular spaces
One-liner
Liquids are denser than gases because they have small intermolecular spaces, meaning molecules are packed more closely together.
37.
Choose the value of the Rydberg constant among the following values?
Correct Answer: C. 1.09678 × 10⁷ m⁻¹
One-liner
The Rydberg constant has a value of 1.09678 × 10⁷ m⁻¹ and is used in spectroscopy to predict the wavelengths of spectral lines of hydrogen.
38.
Which of the following quantities is conserved in Pair production?
Correct Answer: D. All of these
One-liner
In pair production, All of these — charge, momentum, and energy — are conserved quantities.
39.
When did the United Nations declare World Physics Year, also known as Einstein Year?
Correct Answer: B. 2005
One-liner
The United Nations declared the year 2005 as World Physics Year, also known as Einstein Year.
40.
Which year was declared as the International Year of Physics?
Correct Answer: C. 2005
One-liner
The year 2005 was declared as the International Year of Physics by the United Nations.

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Everyday Science misc (127) MCQs with Answers

Miscellaneous MCQs (31–40)

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