Homework Help: physics

Posted by john on Thursday, March 24, 2011 at 10:14pm.

a very thin piece of copper wire has an electrical resistance of 20,000 Ohms. You connect its ends to a regular 2.0 Volt battery. How much power does it draw? Let's assume that this little piece of wire initially contained one trillion (that's a one with 12 zeros) mobile electrons which participate in the electric current flowing through it. How long does it take for an electron that was at one end of the wire when the battery was connected to travel to the other end?

physics - drwls, Friday, March 25, 2011 at 2:07am
P = V^2/R

Current I = V/R = 10^12* e /Time

(e is the electron charge)

Solve for time t.

Answer this Question

Related Questions

physics - a very thin piece of copper wire has an electrical resistance of 20,...
physics - a very thin piece of copper wire has an electrical resistance of 20,...
physics - A piece of copper wire has a resistance per unit length of 6.45*10-3 /...
Physics - (1) 45 micro coulombs of charge is passed through a wire in 35 seconds...
Physics - A piece of copper wire has a resistance per unit length of 5.95 10-3 /...
physics. - please check my answers. when a lamp is plugged into a 120 V socket, ...
Physics - Three conducting straight wires (though insulated from each other) ...
Physic please check - A piece of copper wire has a resistance per unit length of...
science - Calculate the resistance in a circuit in which a 9-volt battery ...
Physics - A certain piece of wire has a resistance of 250 ohms. if the wire is ...

For Further Reading

First Name:
School Subject:
Answer: