The sky appears blue because of
- ADispersion of light
- BReflection of light
- CRefraction of light
- DScattering of light
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Answer: (D) Scattering of light
SSC CPO Physics Questions with Answers & Explanations
20 Physics questions from the General Knowledge & General Awareness section of SSC CPO, 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.
Which colour of light has the longest wavelength?
- AGreen
- BRed
- CViolet
- DBlue
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Answer: (B) Red
Absolute zero temperature is
- A0 °C
- B−273.15 °C
- C−459 °C
- D−100 °C
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Answer: (B) −273.15 °C
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 SI unit of work and energy is the
- APascal
- BNewton
- CWatt
- DJoule
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Answer: (D) Joule
The SI unit of electrical resistance is the
- AVolt
- BFarad
- CAmpere
- DOhm
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Answer: (D) Ohm
Which device converts mechanical energy into electrical energy?
- AMotor
- BTransformer
- CGenerator
- DBattery
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Answer: (C) Generator
The SI unit of force is the
- AJoule
- BWatt
- CNewton
- DPascal
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Answer: (C) Newton
The SI unit of frequency is the
- AWatt
- BTesla
- CHertz
- DDecibel
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Answer: (C) Hertz
The instrument used to measure electric current is the
- AAmmeter
- BOhmmeter
- CGalvanometer only
- DVoltmeter
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Answer: (A) Ammeter
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Timed General Knowledge & General Awareness test · 50 questions · instant rank
Which mirror is used as a rear-view mirror in vehicles?
- AConcave mirror
- BConvex mirror
- CCylindrical mirror
- DPlane mirror
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Answer: (B) Convex mirror
Which lens is used to correct myopia (short-sightedness)?
- AConcave lens
- BCylindrical lens
- CBifocal lens
- DConvex lens
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Answer: (A) Concave lens
A rainbow is formed due to
- AOnly reflection
- BDispersion and total internal reflection of light
- CPolarisation
- DScattering only
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Answer: (B) Dispersion and total internal reflection of light
The acceleration due to gravity on Earth is about
- A9.8 m/s²
- B1.6 m/s²
- C8.9 m/s²
- D10.8 m/s²
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Answer: (A) 9.8 m/s²
Ultrasound has a frequency greater than
- A20,000 Hz
- B200 Hz
- C20 Hz
- D2,000 Hz
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Answer: (A) 20,000 Hz
The SI unit of power is the
- AVolt
- BJoule
- CWatt
- DAmpere
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Answer: (C) Watt
Newton's first law of motion is also called the law of
- AMomentum
- BAcceleration
- CGravitation
- DInertia
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Answer: (D) Inertia
The sky appears blue because of
- ARefraction of light
- BScattering of light
- CDispersion of light
- DReflection of light
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Answer: (B) Scattering of light
The SI unit of electric current is the
- ACoulomb
- BOhm
- CVolt
- DAmpere
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Answer: (D) Ampere
Newton's first law of motion is also called the law of
- AMomentum
- BGravitation
- CInertia
- DAcceleration
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Answer: (C) Inertia
These are RankerClub practice questions written in the SSC CPO pattern. They are not official SSC/IBPS/RRB papers.
