Series Circuits » Exercise – 1
1. A string of five series resistors is connected across a 6 V battery. Zero voltage is measured across all resistors except R3. The voltage across R3 is ________.
(a) 0 V
(b) 1.2 V
(c) 6 V
(d) 0.6 V
2. A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 Ω. If each resistor is operating in the circuit at its maximum power dissipation, total current flow is ________.
(a) 27 mA
(b) 2.7 mA
(c) 19 mA
(d) 190 mA
3. Which of the following series combinations dissipates the most power when connected across a 120 V source?
(a) one 220 Ω resistor
(b) two 220 Ω resistors
(c) three 220 Ω resistors
(d) four 220 Ω resistors
4. A series circuit consists of three resistors with values of 120 Ω, 270 Ω, and 330 Ω. The total resistance is ________.
(a) less than 120 Ω
(b) the average of the values
(c) 720 Ω
(d) 120 Ω
5. When a fourth resistor is connected in series with three resistors, the total resistance ________.
(a) increases by one-fourth
(b) increases
(c) decreases
(d) remains the same
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