When you flip a switch to turn on a light, the delay time before the light turns on is determined by a the speed of the electric field moving in the wire. b the drift speed of the electrons in the wire. c the resistance of the wire. d the number of electron collisions per second in the wire.

What happens to the two identical bulbs A and B con- nected to two 12V batteries, as shown, when the switch is closed? A. B. C. D. A glows, B changes A glows, B stays same A stays same, B changes A stays same, B stays same What happens when the switch is closed if I change the battery on the right to 6V? A. B. C. D. A glows, B changes A glows, B stays same A stays same, B changes A stays same, B stays same 12V 12V fmm A (mm) A B B switch switch ww 12V 6V

7. In a DC circuit 8.41 x 10 19 electrons travel through a point in the circuit in two seconds. What current is in the circuit?   a. 7.43 Amperes   b. 5.36 Amperes   c. 6.73 Amperes   d. 1.10 Amperes   e. 8.41 x 1019 Amperes

1002 V100 202 ww ww R1002 R200 V20 R50 50 1100 I20 V5 V2 = 4 volts V = 9 volts