Physics MCQs

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Physics MCQs

Practice the latest Physics MCQs with answers and detailed explanations. This section includes chapter-wise multiple-choice questions covering mechanics, motion, force, work and energy, heat, light, electricity, magnetism, modern physics, waves, optics, and other important topics. These exam-oriented MCQs are ideal for Class 9–12, NEET, JEE, CUET, SSC, Banking, Railway, JKSSB, Defence, Police, and other competitive exams.

1287
Total Questions

Practice Questions

Page 65 of 65
Question #1281
The SI unit of magnetic flux is
A. Henry
B. Weber
C. Gauss
D. Tesla
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Correct Answer: Option B

Explanation:
Weber (Wb) = T·m².
This question belongs to: Science Physics
Question #1282
A moving coil galvanometer can be converted into a voltmeter by connecting
A. High resistance in parallel
B. Low resistance in parallel
C. Low resistance in series
D. High resistance in series
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Correct Answer: Option D

Explanation:
High resistance in series limits current and extends voltage range.
This question belongs to: Science Physics
Question #1283
The colour of light with minimum wavelength in visible spectrum is
A. Violet
B. Red
C. Green
D. Yellow
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Correct Answer: Option A

Explanation:
Violet ~400 nm, shortest wavelength.
This question belongs to: Science Physics
Question #1284
A convex lens is placed in water. Its focal length
A. Remains same
B. Becomes zero
C. Decreases
D. Increases
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Correct Answer: Option D

Explanation:
Refractive index relative to water decreases, so power decreases, focal length increases.
This question belongs to: Science Physics
Question #1285
The temperature coefficient of resistance of a semiconductor is
A. Zero
B. Negative
C. Positive
D. Infinite
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Correct Answer: Option B

Explanation:
Resistance decreases with temperature for semiconductors, so α negative.
This question belongs to: Science Physics
Question #1286
The working of a rocket is based on
A. Conservation of energy
B. Conservation of linear momentum
C. Law of gravitation
D. Newton's first law
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Correct Answer: Option B

Explanation:
Rocket propulsion: momentum of exhaust gases equals momentum gained by rocket.
This question belongs to: Science Physics
Question #1287
The force of attraction between two bodies of masses 1 kg each separated by 1 m is (G=6.67×10⁻¹¹)
A. 6.67 × 10⁻⁵ N
B. 6.67 × 10⁻¹¹ N
C. 6.67 × 10⁻⁹ N
D. 6.67 × 10⁻⁷ N
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Correct Answer: Option B

Explanation:
F = G×1×1/1² = 6.67×10⁻¹¹ N.
This question belongs to: Science Physics

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