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 Physics Questions

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Q:

A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. This is because of

A) reflection of light B) internal reflection of light
C) refraction of light D) diffraction of light
 
Answer & Explanation Answer: C) refraction of light

Explanation:
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2 1020
Q:

In a transformer the tappings are generally provided on

A) Primary side B) low voltage side
C) High voltage side D) Secondary side
 
Answer & Explanation Answer: C) High voltage side

Explanation:

Tappings are provided in order to maintain the terminal voltage across the loads within the permissible specified limits with respect to load variations.

Generally tappings are preferred on HV side, because the HV side is low current side, tap changer involves low current interruption and large variations or small steps are possible due to more no of turns.

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1 1017
Q:

Which is the form of energy that does NOT occur while riding a bicycle?

A) Heat energy B) Kinetic energy
C) Chemical energy D) Mechanical energy
 
Answer & Explanation Answer: C) Chemical energy

Explanation:
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1 1014
Q:

Nautical miles to km formula

Answer

km ÷ 1.852 = nautical miles


Hence, 1 nmi = 1.852 km.

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Subject: Physics Exam Prep: CAT , Bank Exams

1 1013
Q:

The radius of curvature of a concave mirror is 30 cm. Following Cartesian Sign Convention, its focal length is expressed as

A) -30 cm B) -15 cm
C) +30 cm D) +15 cm
 
Answer & Explanation Answer: B) -15 cm

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1 1013
Q:

If an object is placed at the center of curvature of a concave mirror, then the image formed will be

A) virtual and enlarged B) virtual and diminished
C) real and of the same size D) real and enlarged
 
Answer & Explanation Answer: C) real and of the same size

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1 1011
Q:

The functioning of a very old model pendulum clock was completely

A) Mechanical B) Mechanical and electrical
C) Electrical D) Battery operated
 
Answer & Explanation Answer: A) Mechanical

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5 1010
Q:

If the resistance of a conductor is doubled, the current gets halved. This is because

A) I = V - R B) I = V/R
C) I = Rn/V D) I = VR
 
Answer & Explanation Answer: B) I = V/R

Explanation:
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0 1010