An object is placed at 2F of a convex lens. Image formed is MCQ with Answer and Explanation

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An object is placed at 2F of a convex lens. Image formed is

A. Real, inverted, diminished

B. Virtual, erect, magnified

C. Real, inverted, same size

D. Virtual, inverted, same size

Answer: Option C

Solution (By JKExamLibrary)

At 2F, image also at 2F, real inverted same size. Used in photocopiers.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1

The focal length of a concave mirror is 15 cm. The radius of curvature is

A. 7.5 cm

B. 15 cm

C. 30 cm

D. 45 cm

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Correct Answer: Option C

Explanation:
For spherical mirrors, R = 2f. So R = 2 × 15 = 30 cm. Sign convention: for concave mirror, f and R are negative by Cartesian convention, but magnitude 30 cm. So 30 cm is correct.

This question belongs to: Science Physics

Question #2

The buoyant force on a body immersed in a fluid depends on

A. Volume of body

B. Acceleration due to gravity

C. Density of body

D. Both B and C

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Correct Answer: Option D

Explanation:
Buoyant force = weight of displaced fluid = (volume of body submerged) × density_fluid × g. Depends on volume displaced and g. Not density of body.

This question belongs to: Science Physics

Question #3

An electric iron draws 5 A at 220 V. Its power is

A. 44 W

B. 2200 W

C. 550 W

D. 1100 W

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Correct Answer: Option D

Explanation:
P = V×I = 220 × 5 = 1100 W = 1.1 kW. Energy consumed in 2 hours = 2.2 kWh. Simple.

This question belongs to: Science Physics

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