write my assignment 9176

4.

Six identical resistors are connected in series with a battery. The number of joules per second supplied by the battery is then determined. If a seventh resistor is added (in series) the number of joules per second supplied by the battery:

a. increases

b. decreases

c. stays the same

d. changes, but may increase or decrease

5.

Which of the following, if doubled, would have an effect on the current through a conductor?

a. The number density (n) of mobile charge carriers

b. The drift speed of the mobile charge carriers

c. The charge on the mobile charge carriers

d. All of the above

6.

Which of the following would have an effect on the resistance of a conducting wire?

a. The emf of the battery to which the resistor is connected

b. The current passing the through the conductor

c. The manner in which it is connected to other resistors

d. The material from which the wire is made.