Home
Class 12
PHYSICS
Current is flowing from a conductor si n...

Current is flowing from a conductor si nonuniform cross sectional area. If `A_1 gt A_2,` then find relation between
a. `i_1 and i_2`
b. `j_1 and j_2`
c. `(v_d)_1 and (v_d)_2`
(drift velocity) where I is current, j is current density, and V is drift velocity.

Text Solution

Verified by Experts

a. The charge flowing through a cross section per unit time
is `i. So, i_1 = i_2.`
b. Current density is `J = i//A. As A_1 gt A_2 then j_1lt j_2.`
c. We know `j = "ne"v_a . So drift velocity is v_1 = j/"ne". As j_1 lt jJ_2,`
the `(v_d)_1 lt (v_d)_2.`
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CURRENT AND CIRCUIT

    CENGAGE PHYSICS|Exercise Solved Examples|12 Videos

  • ELECTRIC CURRENT AND CIRCUIT

    CENGAGE PHYSICS|Exercise Exercise 5.1|28 Videos

  • ELECTRIC CURRENT & CIRCUITS

    CENGAGE PHYSICS|Exercise Kirchhoff s law and simple circuits|15 Videos

  • ELECTRIC FLUX AND GAUSS LAW

    CENGAGE PHYSICS|Exercise MCQ s|38 Videos

Similar Questions

Explore conceptually related problems

When current is 4 A in a conductor the drift velocity is v_(d) When the current is 3 A the drift velocity will be

A : When a steady current flows through a conductor of non - uniform cross-section , the current density , electric field and drift velcoity do not remain constant. R : For a constant current the current density electric field and drift velocity are inversely proportional to cross - sectional area.

a. A steady current flows in a metallic conductor of non - uniform cross section. State which of the quantities i.e., current density, electric field, and drift velocity, current density, electric field, and drift velcoity remain constant? b. A steady current passes through a cylindrical conductor. Is there an electorn field inside the conductor?

A current of "1.6A" is flowing through "h" wire having cross- sectional area 1mm^(2) .If density of free electrons in the material of the wire is 10^(29) per m^(3) ,the drift velocity of electrons will be:-

Consider a conductor of variable cross section in which current is flowing from cross section 1 to 2. Then

A current 0.5 amperes flows in a conductor of cross-sectional area of 10^(-2) m^2 . If the electron density is 0.3 * 10^(28) m^(-3) , then the drift velocity of free electrons is

When the current i is flowing through a conductor, the drift velocity is v . If 2i current is flowed through the same metal but having double the area of cross-section, then the drift velocity will be

A current of 10 A is maintained in a conductor of cross-section 1 cm^(2) . If the free electron density in the conductor is 9 xx 10^(28) m^(-3) , then drift velocity of free electrons is