Which device converts mechanical energy into electrical energy?
- AGenerator
- BBattery
- CMotor
- DTransformer
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Answer: (A) Generator
UPSC Civil Services Physics Questions with Answers & Explanations
20 Physics questions from the Science & Technology section of UPSC Civil Services, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.
The SI unit of electric current is the
- AAmpere
- BCoulomb
- CVolt
- DOhm
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Answer: (A) Ampere
Which lens is used to correct myopia (short-sightedness)?
- ABifocal lens
- BCylindrical lens
- CConvex lens
- DConcave lens
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Answer: (D) Concave lens
A rainbow is formed due to
- AOnly reflection
- BPolarisation
- CDispersion and total internal reflection of light
- DScattering only
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Answer: (C) Dispersion and total internal reflection of light
The sky appears blue because of
- ADispersion of light
- BReflection of light
- CScattering of light
- DRefraction of light
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Answer: (C) Scattering of light
Which is a good conductor of electricity?
- AGlass
- BRubber
- CCopper
- DWood
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Answer: (C) Copper
Sound cannot travel through
- ASteel
- BAir
- CWater
- DVacuum
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Answer: (D) Vacuum
The instrument used to measure atmospheric pressure is the
- AThermometer
- BBarometer
- CHygrometer
- DAmmeter
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Answer: (B) Barometer
The SI unit of work and energy is the
- ANewton
- BWatt
- CJoule
- DPascal
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Answer: (C) Joule
Which mirror is used as a rear-view mirror in vehicles?
- AConvex mirror
- BCylindrical mirror
- CConcave mirror
- DPlane mirror
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Answer: (A) Convex mirror
Ready for the real thing?
Timed Science & Technology test · 20 questions · instant rank
Ultrasound has a frequency greater than
- A20 Hz
- B200 Hz
- C2,000 Hz
- D20,000 Hz
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Answer: (D) 20,000 Hz
Which is a good conductor of electricity?
- AWood
- BRubber
- CGlass
- DCopper
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Answer: (D) Copper
The SI unit of pressure is the
- APascal
- BBar
- CJoule
- DNewton
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Answer: (A) Pascal
The bending of light when it passes from one medium to another is called
- ADiffraction
- BDispersion
- CRefraction
- DReflection
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Answer: (C) Refraction
The unit of momentum is
- AJ/s
- BN/m
- Ckg·m/s
- Dkg·m/s²
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Answer: (C) kg·m/s
The acceleration due to gravity on Earth is about
- A10.8 m/s²
- B9.8 m/s²
- C8.9 m/s²
- D1.6 m/s²
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Answer: (B) 9.8 m/s²
Newton's first law of motion is also called the law of
- AMomentum
- BInertia
- CAcceleration
- DGravitation
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Answer: (B) Inertia
The SI unit of frequency is the
- AWatt
- BTesla
- CDecibel
- DHertz
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Answer: (D) Hertz
A rainbow is formed due to
- AScattering only
- BDispersion and total internal reflection of light
- COnly reflection
- DPolarisation
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Answer: (B) Dispersion and total internal reflection of light
Which colour of light has the longest wavelength?
- ABlue
- BViolet
- CRed
- DGreen
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Answer: (C) Red
These are RankerClub practice questions written in the UPSC Civil Services pattern. They are not official SSC/IBPS/RRB papers.
