The mirror used as rear-view mirror in vehicles is MCQ with Answer and Explanation

Question Report Error
The mirror used as rear-view mirror in vehicles is
A. Parabolic mirror
B. Concave mirror
C. Plane mirror
D. Convex mirror
Answer: Option D
Solution (By JKExamLibrary)
Convex mirror gives wider field of view, always forms virtual, erect, diminished image. Allows driver to see larger area. Concave can magnify but field narrow. Plane gives normal view but limited field.
This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error
The device used to measure the emf of a cell without drawing current is
A. Ammeter
B. Voltmeter
C. Potentiometer
D. Galvanometer
Discuss

Correct Answer: Option C

Explanation:
Potentiometer: null deflection method, no current drawn from cell.
This question belongs to: Science Physics
Question #2 Report Error
A wire of resistance R is cut into three equal parts. These parts are then connected in parallel. The equivalent resistance is
A. R
B. R/3
C. R/9
D. 3R
Discuss

Correct Answer: Option C

Explanation:
Each part resistance = R/3. Three such in parallel: 1/R_eq = 3/(R/3) = 9/R => R_eq = R/9. For n equal parts cut and connected parallel, R_eq = R/n².
This question belongs to: Science Physics
Question #3 Report Error
Which of the following is a semiconductor?
A. Iron
B. Silver
C. Silicon
D. Copper
Discuss

Correct Answer: Option C

Explanation:
Silicon and germanium are semiconductors.
This question belongs to: Science Physics
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