Question

4. Imagine your computer screen forms the periphery of an electric circuit. The bottom side contains a 10-Ohm resistor, the left side a 20-Ohm resistor, the left side a 20-Ohm resistor, top side a 12-Volt battery with the left side negative and the right side positive. The right side also contains a 30-Ohm resistor. The current direction in the circuit is clockwise. Starting from the bottom of the left corner, imagine traversing the circuit in the clockwise direction. If you apply Kirchoff's voltage rule, the equation would be:

a) none

b) 10 I - 12 - 30 I - 20 I = 0

c) -10 I - 12 - 30 I - 20 I = 0

d) -10 I - 12 + 30 I + 20 I = 0

e) 10 I + 12 - 30 I + 20 I = 0

5. Electric current is:

a) charge divided by the time for the flow of charge

b) charge divided by the time for the flow of charge as well as voltage divided by the resistance

c) voltage multiplied by the resistance

d) none

e) voltage divided by the resistance

6. A 60Hz AC circuit has a maximum voltage of 120 V and consists of a capacitor of 100 microfarads, an inductor of 100 my, and a resistor of 100 Ohm. What is the capacitive reactance?

a) 0.038 Henry

b) 2.6E-5 Ohm

c) 0.38m Ohm

d) 26.54 Ohm

e) none

Answer 1