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Physics Mcqs

When an electron moving with a uniform speed in a vacuum enters a magnetic field in a direction perpendicular to the field the subsequent path of the electron is ___________________?

  • (A)  a straight line parallel to the field
  • (B)  a parabola in a plane perpendicular to the field
  • (C)  a circle in a plane perpendicular to the field
  • (D)  a straight line along its initial direction
Submitted By :Ali Uppal


The effective way to increase the sensitivity of a moving coil galvanometer is to___________________?

  • (A)  use a very long and fine suspension
  • (B)  use a coil of very large area
  • (C)  use a coil with very large number of turns
  • (D)  use a very strong magnetic field
Submitted By :Ali Uppal


An ammeter measures the total current flowing through a circuit when it is connected__________________?

  • (A)  in series with the circuit
  • (B)  in parallel with circuit
  • (C)  in series with any of the parallel resistances in the circuit
  • (D)  in parallel with any of the series resistances in the circuit
Submitted By :Ali Uppal


While measuring the unknown resistance the help of slide wire bridge a greatest accuracy can be achieved when__________________?

  • (A)  a most sensitive galvanometer is used
  • (B)  a steady voltage cell is used
  • (C)  the balance point is close to the middle of the wire
  • (D)  a high resistance box is used in one of its gap
Submitted By :Ali Uppal


Submitted By :Ali Uppal


The sensitivity of a galvanometer is given by__________________?

  • (A)  C/BAN
  • (B)  CAN/B
  • (C)  BAN/C
  • (D)  ABC/N
Submitted By :Ali Uppal


Submitted By :Ali Uppal


The magnetic field strength of solenoid is__________________?

  • (A)  B = μNI
  • (B)  B = μN/I
  • (C)  B = μnI
  • (D)  Both B and C
Submitted By :Ali Uppal


The direction of propagation of an electromagnetic waves is________________?

  • (A)  Perpendicular to electric field
  • (B)  Perpendicular to both electric and magnetic field
  • (C)  Perpendicular to magnetic field
  • (D)  Parallel to electric and magnetic field
Submitted By :Ali Uppal


A changing magnetic flux produces around itself an induced_______________?

  • (A)  Magnetic field
  • (B)  Electric field
  • (C)  Electromagnetic force
  • (D)  Artificial gravitational field
Submitted By :Ali Uppal