Home
Class 12
PHYSICS
Assertion: The bending of an insulated w...

Assertion: The bending of an insulated wire increase the resistance of wire
Reason : The drift velocity of electron in this wire decreases

Text Solution

Verified by Experts

The correct Answer is:
D

Bending will not increase the resistance of the conducting wire. Also drift velocity of electron is independent of bending of conductor.
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NCERT FINGERTIPS|Exercise NCERT Exemplar|6 Videos
  • COMMUNITCATION SYSTEMS

    NCERT FINGERTIPS|Exercise HOTS|10 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

Assertion: The bending of an insulated wire increase the resistance of wire Reason : The drift velocity of electron in heat wire decreases

Assertion : The electric bulbs glows immediately when switch is on. Reason : The drift velocity of electrons in a metallic wire is vary high.

Assertion : A wire of uniform cross-section and uniform resistivity is connected across an ideal cell. Now the length or wire is doubled keeping volume of wire constant. The drift velocity of electrons after stretching the wire becomes one fourth of what it was before streching the wire. Reason: If a wire (or uniform resistivity and uniform cross-section) of length l_(0) is stretched by a factor n, then its resistance becomes n^(2) times the one before stretching the wire (the volume of wire is kept constant in stretching process.) Fruther at constant potential difference, current is inversely proportional to resistance. Drift velocity of free electron is directly proportional to current and inversely proportional to cross-sectional area of current carrying wire.

Two different wires X and Y of same diameter but different materials are joined in series across a battery. If the number density of electrons in X is twice that in Y, find the ratio of drift velocity of electrons in the two wires .

If the current flowing in a copper wire be allowed to flow in another copper wire of same length but of doubled the radius, then what will be the effect on the drift velocity of the electrons. If the same current be allowed to flow in an iron wire of the same thickness, then ?