In this post, we give you some interesting questions in Physics (15 one mark questions) for practice. These questions are collected across almost all the chapters in Physics syllabus and will prove to be challenging / tough for some atleast. Post your answers to these questions, if you know..
1) The relationship between current density and drift velocity is given by:
a) $ J=nAev_{d} $
b) $ J=nAv_{d} $
c) $ J=nev_{d} $
d) $ J=nAe^2v_{d} $
2) The wire stretched between the ends A and B of potentiometer is made up of:
a) copper
b) constantan
c) manganin
d) either (a) or (b)
3) The electrolytes used in the verification of Faraday’s second law is:
a) $ Ag_{2}(NO_{3})_{2} $
b) $ CuSO_{4} $
c) $ AgNO_{3} $
d) both (a) and (b)
4) Ohm’s law holds good, when the current flowing through the conductor is:
a) steady
b) unsteady
c) both (a) and (b)
d) infinity
5) A mass of m gm of gold is deposited when 2 amp of current flows for 2 min. The amount of gold deposited by 6 amp of current for 9 min will be:
a) 3m/2
b) 2m/3
c) 3m
d) 2m
6) The drift velocity of an electron in an electric field of $ 4\times 10^4 Vm^{-1} $ is $ 10^{-3} ms^{-1} $. Its mobility is:
a) $ 2.5\times10^{-7} m^2V^{-1}s^{-1} $
b) $ 0.25\times10^{-7} m^2V^{-1}s^{-1} $
c) $ 25\times10^{-7} V^{-1}m^{-2}s^{-1} $
d) $ 250\times10^{-8} Vm^{-2}s^{-1} $
7) The resistivity of semiconductors is of the order of
a) $ 10^8 - 10^{-14} \; \Omega m $
b) $ 10^{-4} - 10^10 \; \Omega m $
c) $ 10^{-6} - 10^{-4} \; \Omega m $
c) $ 10^{-2} - 10^2 \; \Omega m $
8) Kirchoff’s second law is:
a) heat law
b) power law
c) voltage law
d) current law
9) The specific gravity of the electrolyte in lead-acid accumulator is:
a) 0.48
b) 1.08
c) 1.28
d) 2.28
10) If the resistance of a coil is $ 2 \; \Omega $ at zero degree C and $ \alpha = 0.004 $ per degree C, then its resistance at 100 degree C is:
a) $ 1.4 \; \Omega $
b) $ 0 \; \Omega $
c) $ 4 \; \Omega $
d) $ 2.8 \; \Omega $
11) The branch of physics which deals with the study of motion of electric charges is called:
a) statics
b) static electricity
c) current electricity
d) electrostatics
12) …………………………… is used to levitate trains above the rails:
a) superconducting magnets
b) horse shoe magnets
c) electromagnets
d) bar magnets
13) A material with a negative temperature co-efficient is called a:
a) thermometer
b) thermistor
c) thermostat
d) thermopile
14) The free electrons in the electric field E experience a force F equal to:
a) E/e
b) e/E
c) Ee
d) none of the above
15) An Aluminium wire of $ 2mm^2 $ area of cross section carries current of 3A. The current density is:
a) $ 1.5\times 10^{-6} \; Am^{-1} $
b) $ 0.66\times 10^6 \; Am^{-1} $
c) $ 1.5\times 10^{-3} \; Am^{-1} $
d) $ 0.67\times 10^3 \; Am^{-1} $
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