electric- current
12th Assignments 

Objective questions of current electricity

Nayan Jha 817 Comments

OBJECTIVE QUESTIONS OF CURRENT

This topic provide important  objective questions for electric current it will be very important for the students preparing for class 12th board examination or JEE/NEET

  1. For which of the following dependence of drift velocity ʋ on electric field E is ohm’s law obeyed?
  • (a) ʋ ꭀ E (b) ʋ = constant              (c) ʋ ꭀ E1/2              (d) ʋ ꭀ E2
  1. in metals the time of relaxation of electrons:
  • (a)increases with increasing temperature
  • (b)decreases with increasing temperature
  • (c)does not depend on temperature
  • (d)changes suddenly at 400 K
  1. Constantan wire is used for making standard resistance because it has:
  • (a)low specific resistance
  • (b)high specific resistance
  • (c)negligible temperature coefficient of resistance
  • (d)high melting point
  1. A potential difference is applied across the ends of a metallic wire. If the potential difference is doubled, the drift velocity:
  • (a)will be doubled                               (c) will be quadrupled
  • (b)will be halved (d) will remain unchanged
  1. The maximum current that flows in the fuse wire, before it blow out, varies with the radius r as:
  • (a)r3/2      (b) r                                   (c) r2/3                    (d) r1/2
  • To download entire questions paper click here-click here electric current objective questions

You May Also Like

Objective questions of magnetic effect of current

Nayan Jha 910
PHASOR DIAGRAM -2

Objective questions of alternating current

Nayan Jha 803

Wave optics and optical instruments

Nayan Jha 872

817 thoughts on “Objective questions of current electricity”