In a semiconductor, the temperature coefficient of resistance is MCQ with Answer and Explanation

In a semiconductor, the temperature coefficient of resistance is
A. Negative
B. Infinite
C. Zero
D. Positive
Answer: Option A
Solution (By JKSSB Mock Tests)
Semiconductors have negative temperature coefficient: resistance decreases with temperature.

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Practice More Physics Questions

Question #1
Water's high specific heat useful for:
A. Neither
B. Engine cooling
C. Biological temperature regulation
D. Both

Correct Answer: Option D


Explanation:
High c = absorbs/releases large heat with small ΔT. Stabilizes engine temperatures and organism body temperatures. Memory tip: 'High specific heat = thermal buffer; water moderates climate and physiology'. Property application frequently tested in competitive exams.

This question belongs to: Science Physics
Question #2
The mass of a proton is approximately how many times the mass of an electron?
A. 1000
B. 100
C. 10
D. 1836

Correct Answer: Option D


Explanation:
Proton mass ≈ 1.67 × 10⁻²⁷ kg, electron ≈ 9.11 × 10⁻³¹ kg, ratio ≈ 1836. Neutron slightly heavier. Atomic mass concentrated in nucleus.

This question belongs to: Science Physics
Question #3
A concave mirror forms a real, inverted, magnified image when object is
A. At infinity
B. Between F and C
C. Between P and F
D. At C

Correct Answer: Option B


Explanation:
Between F and C: image beyond C, magnified, inverted, real.

This question belongs to: Science Physics