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Physics

Q.1) Nuclear sizes are expressed in a unit named

(A) Fermi

(B) angstrom

(C) newton

(D) tesla

Q.2) Light year is a unit of

(A) time

(B) distance

(C) light

(D) intensity of light

Q.3) Light from the Sun reaches us in nearly

(A) 2 minutes

(B) 4 minutes

(C) 8 minutes

(D) 16 minutes

Q.4) Pa(Pascal) is the unit for

(A) thrust

(B) pressure

(C) frequency

(D) conductivity

Q.5) Metals are good conductors of electricity because

(A) they contain free electrons

(B) the atoms are lightly packed

(C) they have high melting point

(D) All of the above

Q.6) Stars twinkle because

(A) the intensity of light emitted by them changes with time

(B) the distance of the stars from the earth changes with time

(C) the refractive index of the different layers of the earth's atmosphere changes continuously, consequ

(D) the light from the star is scattered by the dust particles and air molecules in the earth's atmosphe

Q.7) Pick out the scalar quantity

(A) force

(B) pressure

(C) velocity

(D) acceleration

Q.8) Rectifiers are used to convert

(A) Direct current to Alternating current

(B) Alternating current to Direct current

(C) high voltage to low voltage

(D) low voltage to high voltage

Q.9) which is not emitted by radioactive substance?

(A) Electrons

(B) Electromagnetic radiations

(C) Alpha particles

(D) Neutrons

Q.10) Sound waves in air are

(A) transverse

(B) longitudinal

(C) electromagnetic

(D) polarised

ਜੇਕਰ ਤੁਸੀ ਕਿਸੇ ਵੀ ਸਰਕਾਰੀ ਨੌਕਰੀ ਬਾਰੇ ਜਾਣਕਾਰੀ ਲੈਣਾ ਚਾਹੁੰਦੇ ਹੋ ਤਾ ਉੱਤੇ ਦਿੱਤੇ ਕੰਮੈਟ ਬਾਕਸ ਵਿੱਚ ਕੰਮੈਟ ਕਰ ਸਕਦੇ ਹੋ ਧੰਨਵਾਦ ਅਰਨ ਮਨੀ ਜੋਬਜ ਟੀਮ