1.How many electrons are moving through a current of 2 A for 2 s?
(A) 3.2 × 10⁻¹⁹
(B) 6.28 × 10¹⁸
(C) 4
(D) 2.5 × 10¹⁹

2. How much electrical energy is generated by a 100-W lightbulb turned on for 5 min?
(A) 20 J
(B) 500 J
(C) 3000 J
(D) 30,000 J

3. What is the equivalent capacitance of the circuit shown below?
(A) 2 F
(B) 5 F
(C) 8 F
(D) 10 F

Answer questions 4 and 5 based on the circuit below:

4. If the current in the battery above is 4 A, then the power consumed by resistor R is
(A) 6 W
(B) 7 W
(C) 18 W
(D) 24 W

5. What is the value of resistor R in the circuit above?
(A) 4 Ω
(B) 3 Ω
(C) 5 Ω
(D) 6 Ω

6. A 5-Ω and a 10-Ω resistor are connected in series with one source of emf of negligible internal resistance. If the energy produced in the 5-Ω resistor is X, then the energy produced in the 10-Ω resistor is
(A) X
(B) 2X
(C) X/2
(D) X/4

7. Four equivalent lightbulbs are arranged in a circuit as shown below. Which bulb(s) will be the brightest?
(A) A
(B) B
(C) C
(D) D

8. A 60-Ω resistor is made by winding platinum wire into a coil at 20°C. If the platinum wire has a diameter of 0.10 mm, what length of wire is needed?

9. Based on the circuit shown below:

(a) Determine the equivalent resistance of the circuit.
(b) Determine the value of the circuit current I.
(c) Determine the value of the reading of ammeter A.
(d) Determine the value of the reading of voltmeter V.

10. Compare the brightness of two identical bulbs connected in series to their brightness when connected in parallel to the same battery. How does the power consumption of the battery compare?

11. You have five 2-Ω resistors. Explain how you can combine them in a circuit to have equivalent resistances of 1, 3, and 5 Ω.

12. A laboratory experiment is performed using lightbulbs as resistors. After a while, the current readings begin to decline. What can account for this?