1. Electron guns are used in X-ray tubes. The electrons are accelerated through a relatively large voltage and directed onto a metal target, producing X-rays.

(a) How many electrons per second strike the target if the current is 0.500 mA?

(b) What charge strikes the target in 0.750 s?

2. An extension cord has a small amount of resistance due to the materials it is made from.

(a) Find the voltage drop in an extension cord having a 0.0600-? resistance and through which 5.00 A is flowing.

(b) A cheaper cord utilizes thinner wire and has a resistance of 0.300?. What is the voltage drop in it when 5.00 A flows?

3. Find the power dissipated in each of these extension cords:

(a) an extension cord having a 0.0600-? resistance and through which 5.00 A is flowing

(b) a cheaper cord utilizing thinner wire and with a resistance of 0.300?.