The scientist who proposed the electromagnetic theory of light was MCQ with Answer and Explanation

The scientist who proposed the electromagnetic theory of light was
A. Newton
B. Huygens
C. Maxwell
D. Einstein
Answer: Option C
Solution (By JKSSB Mock Tests)
Maxwell's equations predicted EM waves, light is EM.

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Practice More Physics Questions

Question #1
A person of mass 60 kg stands on a weighing scale in an elevator accelerating upward at 2 m/s² (g=10). The reading is
A. 120 kg
B. 60 kg
C. 72 kg
D. 48 kg

Correct Answer: Option C


Explanation:
Apparent weight = m(g+a) = 60×(10+2) = 720 N, which corresponds to 72 kg mass on scale (if scale calibrated in kg under g=10). Reading 72 kg. Downward acceleration would reduce.

This question belongs to: Science Physics
Question #2
The apparent weight of a person in an elevator moving downwards with an acceleration 'a' (where a < g) is:
A. Greater than true weight
B. Less than true weight
C. Equal to true weight
D. Zero

Correct Answer: Option B


Explanation:
When an elevator moves downwards with acceleration 'a', the net downward force on the person is mg - R = ma, where R is the normal reaction (apparent weight). Solving for R gives R = m(g - a). Since g - a is less than g, the apparent weight (R) is less than the true weight (mg).

This question belongs to: Science Physics
Question #3
Which of the following is a non-contact force?
A. Friction
B. Normal force
C. Electrostatic force
D. Muscular force

Correct Answer: Option C


Explanation:
Electrostatic force acts between charges at a distance without contact. Gravity, magnetic force also non-contact. Friction and normal require contact.

This question belongs to: Science Physics