a current passes through a wire of non-uniform cro

Question

a current passes through a wire of non-uniform cross-section.Which of the following quantities are independent of the cross section?
(a) the charge crossing in a given time interval
(b) drift speed
(c) current density
(d) free electron density
pls give the reason too as to why each option is correct or wrong.

Sher Mohammad · Accepted Answer

Current IN will always equal current OUT. In a wire, and electric current will not alter the balance of electrons and protons - well, there can be a slight shift, but a very VERY tiny and neglectable one - so you can assume that the number of electrons entering the wire is identical to the number leaving. That means the amount of current entering must always equal the amount leaving. This is the basic principle you should really think about and get to understand

sher mohammad

b.tech, iit delhi

Electric Current> a current passes through a wire of non-un...

Pushkar Aditya , 12 Years ago

Sher Mohammad

PREETAM YADAV

LIVE ONLINE CLASSES

The fig. Shows a network of resistance in which the point A is earthed

electric current

When a p.d of 2v is applied across a resistor, 10j of energy are covered. What charge flows through the resistor?

electric current

Please provide it's solution. In video form
Find the equivalent resistance of the given figure

electric current

The resistivity of material is 10 ohm m at 30 C when the temperature drops to 28 then the resistivity drops by 2. The temperature coefficient of resistivity of material is

electric current

Three cells of 2.0v each and internal resistance of 1.0 each are connected in series and in parallel calculate the new emf and new internal resistance in each connection

electric current

Electric Current> a current passes through a wire of non-un...

Pushkar Aditya , 12 Years ago

Sher Mohammad

PREETAM YADAV

LIVE ONLINE CLASSES

Other Related Questions on electric current

The fig. Shows a network of resistance in which the point A is earthed

electric current

When a p.d of 2v is applied across a resistor, 10j of energy are covered. What charge flows through the resistor?

electric current

Please provide it's solution. In video form Find the equivalent resistance of the given figure

electric current

The resistivity of material is 10 ohm m at 30 C when the temperature drops to 28 then the resistivity drops by 2. The temperature coefficient of resistivity of material is

electric current

Three cells of 2.0v each and internal resistance of 1.0 each are connected in series and in parallel calculate the new emf and new internal resistance in each connection

electric current

Please provide it's solution. In video form
Find the equivalent resistance of the given figure