Which of the following is a fundamental unit in the SI system? MCQ with Answer and Explanation

Which of the following is a fundamental unit in the SI system?
A. Pascal
B. Candela
C. Joule
D. Newton
Answer: Option B
Solution (By JKSSB Mock Tests)
The seven fundamental SI units are: metre (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and candela (cd). Candela is the unit of luminous intensity. Newton, joule, and pascal are derived units. Newton = kg·m/s², joule = kg·m²/s², pascal = kg/(m·s²). Hence, candela is a fundamental unit. Exam tip: Remember the acronym ‘MKS A K M C’ for the seven base units.

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Practice More Physics Questions

Question #1
The time period of a simple pendulum is 2 s at a place where g=9.8 m/s². Its length is about
A. 1 m
B. 0.5 m
C. 0.25 m
D. 2 m

Correct Answer: Option A


Explanation:
T=2π√(L/g) => L = gT²/(4π²) ≈ (9.8×4)/(4×9.87) ≈ 1 m.

This question belongs to: Science Physics
Question #2
If the momentum of a body is doubled, its kinetic energy becomes
A. Same
B. Four times
C. Double
D. Half

Correct Answer: Option B


Explanation:
K = p²/(2m), if p'=2p, K'=4p²/(2m)=4K. Quadratic relation.

This question belongs to: Science Physics
Question #3
The SI unit of magnetic flux is
A. Henry
B. Tesla
C. Gauss
D. Weber

Correct Answer: Option D


Explanation:
Weber (Wb) = T·m².

This question belongs to: Science Physics