Pleae answer alll this is my last post 1.A 500.0 Ohm resistor is connected to a

Question

Pleae answer alll this is my last post

1.A 500.0 Ohm resistor is connected to a 3.0 V battery.

Calculate the current through this resistor.

Calculate the power dissipated in the resistor.

2.A current of 2.00 Amperes is maintained in a simple circuit with a total resistance of 3.50 ohms. How much heat is generated in 3.50 s?

3.What is the resistance (in ) of a spool of copper wire ( = 1.69·10-8 · m)? It has a length L = 16 m and a diameter of d = 1.2 mm.

4.In a classic model, the electron of a hydrogen atom circles the proton at a radius of 1.9044·109m when it is in the n=6 state. What is its electric potential energy?

Explanation / Answer

1)

here by using ohms law

V = I * R

I = 3 / 500

I = 0.006 amp

then for power

P = I * V

P = 0.006 * 3

P = 0.018 W

the power in the resistor is 0.018 W

2)

P = R * I^2

P = 3.5 * 4

P = 14 W

then for the heat

H = 14 * 3.5 = 49 J

so the heat generated is 49 J

3)

here we use the formula

R = rho * L / A

R = 1.69 * 10^-8 * 16 / 3.1 * 0.0006^2

R = 0.2423 ohm

the resistance of the wire is 0.2423 ohm

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