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Test Series-16




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  • Your test contains 20 multiple choice questions with only one answer
  • This is 30 min test.Please make sure you complete it in stipulated time
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  • Once finished you get a chance to review all question with correct answers and their solutions.


1.Which of these is false for electric charge?
  • Electric charge is additive
  • e (1.6X10-19 C) is the elementary charge
  • charge can not be destroyed or created
  • 1 Coulumb of charge contain 6.25X1017 electron
  • Coulomb law of electric force between the charges follows Newton's third law of motion
  • The net force on any charge equals the vector sum of the forces exerted on it by all the charges

Link Type comphrehension( Q2-Q5)
A parallel plate capacitor has capacitance C. It is connected to a battery of EMF E until fully charged, and then disconnected. The plates are then pulled apart an extra distance d, during which the measured potential difference between them changed by a factor of i.
2) Did the potential difference increase or decrease by a factor of i?
  • decrease
  • increase

3. What is true about electric field between the plates
  • electric field remains unchanged
  • electric field decrease by the factor i
  • electric field increase by the factor i
  • None of these

4..What is true of energy stored in electric field?
  • Energy remains unchanged
  • Energy decrease by the factor i
  • Energy increase by the factor i
  • None of these

5.What happens the to the capacitance ?
  • Capacitance increases
  • Capacitance decreases
  • Capacitance remains unchanged

6. Electromotive force represents
  • Work
  • Momentum
  • Power
  • Energy per unit change
  • Force

7. Which of the following is False?
  • Kirchoff's first law of electric circuit is law of conservation charge
  • Kirchiff's second law of electric circuit is law of conservation of energy
  • Kirchoff's second law is based on law of conservation of momentum
  • None of these

8. Both electric forces and magnetic forces can deflect electron. Which of the following statement is false?
  • Kinetic energy of the electron does not change in magnetic field
  • Kinetic energy of the electron do change in electric field
  • Kinetic energy neither changes in electric field nor in magnetic field
  • None of these

9.A particle is moving vertically downward.it passes through a magnetic field directed from south to north in a horizontal plane.which of the following is false?
  • If the particle is positively charged ,it will be deflected towards east
  • If the particle is negatively charged ,it will be deflected towards east
  • If the particle has no charge ,it will not be deflected
  • None of these

10.A charged particle at rest experiences no forces. At the location of the particle
  • electric field may or may not be zero, Magnetic Field must be zero
  • electric field may or may not be zero, Magnetic Field may or may not be zero
  • electric field must be zero,Magnetic Field must be zero
  • electric field must be zero, Magnetic Field may or may not be zero

11. A Proton moving with constant velocity passes through a region without any change in its velocity. If E and B denote electric and magnetic field,this region cannot have
  • E > 0, B >0
  • E=0,B=0
  • E > 0,B=0
  • E=0,B > 0

12. A bar magnet falls verticall down through a coil placed in horizontal plane? What will be the acceleration of bar magnet?
  • g
  • greater than g
  • less than g
  • zero
13. which of these are true?
  • A conducting rod XY moves parallel to the x-axis in a unform magnetic field poiting in +z direction.The end X is towards -y direction.The end X will be positiveely charged
  • A square coil of metal wire is stationary in a non-uniform magnetic field,An Emf is induced in the coil
  • The self inductance of the straight conductor is very large
  • Lenz's law is a consequence of the law of conservation of charge
14. An inductor stores energy in its
  • Magnetic field
  • Electric field
  • electric and magnetic field both
  • None of these
15. which of these is not true for radioactive decay.
  • The nucleus of the atom emits the radio active radition
  • The penetrating power of Gamma rays is highest among the radioative radiation
  • alpha and beta particles are deflected by electric and magnetic field but gamma rays are not
  • None of these
16. When a ray of light enters a glass slab from air
  • Wavelenght decreases
  • Frequency increase
  • Neither wavelenght nor frequency changes
  • None of these
17. Which of the these is true in Bohr model of hydrogen atom
  • The total energy of electron in the mth orbit is inversely proportional to m
  • radiation are emmited when electron jumps from lower orbit to higher orbit
  • The radius of the mth orbit is inversely propotional to m
  • Angular momentum of the electron in mth orbit is an integral multiple of h/2π
18. In an AC circuit, which of these is true?
  • The applied instantanous voltage equal to the algebric sum of the instantanous voltages across the different element
  • The applied instantanous voltage equal to the vector sum of the instantanous voltages across the different element
  • Power dissipation happens in inductor and resistance in an AC circuit
  • None of these
19. If the distance between the earth and sun were half its present value,the number of days in the years would have been
  • 129
  • 730
  • 181
  • 64.5
20. Which of these is false for movement of alpha and beta particles in electric and magnetic field
  • Both the article move in circular path in magnetic field
  • curvature of path of beta particle is more than the curvature of alpha particle in magnetic field
  • Deflection of alpha particle is opposite to that beta particle in electric field
  • None of these



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