The current density (to J) at cross-sect...

The current density (to J) at cross-sectional area (to A = `(2hati + 4hatj)``(mm^2)` is `(2hatj + 2hatk)`A /`(m^2)`. The current flowing through the cross-sectional area is

`(12 muA)`

`(8 muA)`

`(4 muA)`

Zero

Text Solution

AI Generated Solution

Topper's Solved these Questions

TEST 4
AAKASH INSTITUTE|Exercise EXAMPLE|80 Videos
TEST 6
AAKASH INSTITUTE|Exercise EXAMPLE|177 Videos

Similar Questions

Explore conceptually related problems

The current density vecJ at cross sectional area vecA = (2hati+4hatj) mm^2 is (2hatj+2hatk) A m^(-2) . The current following through the cross-sectional area is

Current density (vecJ) in an area of cross section vecA=(2hati+3hatj)cm^2 " is " vecJ=(8hati+2hatj)A//m^2 . Current through the area is

A solenoid of cross-sectional area 2xx 10^(-4)m^(2) and 900 turns has 0.6A m^(2) magnetic moment. Then the current flowing through it is

A cylindrical wire if radius R = 2 mm is of uniform area of cross-section. The current density through a cross-section varies with radial distance r as J = ar^(2) , where a =3.2 xx 10^(11)A//m^(2) and r is in metres. What is the current through the outer portion of the wire between radial distances R//2 and R?

A cross–sectional area of a copper wire is 3xx10^(–6) m^2 . The current of 4.2 amp. is flowing through it. The current density in "amp"//m^2 through the wire is –

The current density at a point is vecj = (2xx10^(4)hatj)Jm^(-2) . Find the rate of charge flow through a cross sectional area vecS = (2hati +3hatj)cm^(2)

Assertion: The resistance of a conductor decreases with increase in cross sectional area. Reason: On increasing the cross sectional area of a conductor, more current will flow through the conductor.

Assertion : If a current is flowing through a conducting wire of non-uniform cross-section, drift speed and resistance both will increase at a section where cross-sectional area is less. Reason : Current density at such sections is more where cross-sectional area is less.

The resistivity of a potentiometer wire is 40xx10^(-8)Omega-m and its area of cross section is 8xx10^(-6)m^(2) . If 0.2 A current is flowing through the wire the potential gradient will be

AAKASH INSTITUTE-TEST 5-EXAMPLE

Two cities are 80 km apart. The electric power is sent from one city t...
Text Solution
|
Two wires of the same dimensions but resistivities rho(1) and rho(2) a...
Text Solution
|
The current density (to J) at cross-sectional area (to A = (2hati + 4h...
Text Solution
|
Three identical bulbs are connected in parallel across in ideal source...
Text Solution
|
A group of six identical cells each of emf E and internal resistance r...
Text Solution
|
In the given circuit, the switch S is closed at time t = 0, then selec...
Text Solution
|
In the given circuit, the switch S is closed at time t=0 then select t...
Text Solution
|
A group of six identical cells each of emf E and internal resistance r...
Text Solution
|
Three identical bulbs are connected in parallel across an ideal source...
Text Solution
|
The equivalent resistance between points A and B in the circuit shown ...
Text Solution
|
The mixed grouping of partical cells are shown in the figure . The giv...
Text Solution
|
A simple potentiometer circuit is shown in the figure. The internal re...
Text Solution
|
The current density vecJ at cross sectional area vecA=(2hati+4hatj) mm...
Text Solution
|
The wires is of same dimension but resistivities rho1 and rho2 are con...
Text Solution
|
A carbon and an aluminium wire are connected in series . If the combin...
Text Solution
|
Two cities are 80 km apart . The electric power is sent from one City ...
Text Solution
|
Consider the ladder network shown is the figure . The value of X, so t...
Text Solution
|
Two bulbs 220 Volt, 220 Watt are connect for first in series and then...
Text Solution
|
The reading of ammeter in the circuit shown in the figure is
Text Solution
|
The charge Q( in coulomb) flowing through a resistance R=10Omega varie...
Text Solution
|