Current Electricity-Drift Velocity [JEE (Based on NTA Guidelines-IIT Engg.) Mains Physics]: Questions 1 - 4 of 9

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Question 1

Appeared in Year: 2006

Question MCQ▾

If the ratio of the concentration of electrons that of holes in a semiconductor is and the ratio of currents is then what is the ration of their drift velocities? (AIEEE)

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 2

Appeared in Year: 2021

Question Match List-Ⅰ List-Ⅱ▾

Column-I gives certain physical terms associated with flow of current through a metallic conductor.

Column-II gives some mathematical relations involving electrical quantities. Match Column-I and Column-II with appropriate relations.

List-Ⅰ (Physical Terms)List-Ⅱ (Mathematical Relations)
(A)

Electrical Resistivity

(i)

(B)

Drift Velocity

(ii)

(C)

Current Density

(iii)

(D)

Relaxation Period

(iv)

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (ii)
  • (iii)
  • (iv)
  • (i)

b.

  • (i)
  • (iii)
  • (iv)
  • (ii)

c.

  • (iii)
  • (iv)
  • (i)
  • (ii)

d.

  • (iv)
  • (ii)
  • (i)
  • (iii)

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Question 3

Question MCQ▾

At room temperature, copper has free electron density of . The electron drift velocity in a copper conductor of cross-sectional area and carrying a current of , will be –

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 4

Question MCQ▾

The drift velocity of free electrons in a conductor is , when a current. is flowing in it If both the radius and current are doubled, then drift velocity will be ________.

Choices

Choice (4)Response

a.

b.

c.

d.

Edit