# Electric Circuit Analysis/Circuit Analysis Quiz 1/Electric Circuit Analysis quiz 1

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## Circuit Analysis Quiz 1 (modified)

1 3 amps flow through a 1 ohm resistor. What is the voltage?

 ${\displaystyle 3V}$ ${\displaystyle 1V}$ ${\displaystyle {\frac {1}{3}}V}$ None these are correct.

2 Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say voltage?

 It's an electrical cliche. The other point could be negative or positive. None these are correct Voltage is a measure of electric potential difference between two points.

3 A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?

 2V. 10V. 0.5V. 1V.

4 A resistor has 10 volts across it and 4 amps going through it. What is its resistance?

 None of these are true. ${\displaystyle 3.5\Omega .}$ ${\displaystyle 4.5\Omega .}$ ${\displaystyle 2.5\Omega .}$

5 If you plot voltage vs. current in a circuit, and you get a linear line, what is the significance of the slope?

 Power. Resistance. Discriminant. None of these are true.

6 A resistor has 3 volts across it. Its resistance is 1.5 ohms. What is the current?

 12A 3A 2A 1.5A

7 A resistor has 8 volts across it and 3 amps going through it. What is the power consumed?

 2.2W 24W 8W 3W

8 A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power consumed?

 None of these are ture. 11.67 joules 1.67 watts 2.5 watts

9 A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?

 25 joules 3 joules 5 joules None of these are true

10 A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power consumed?

 I = 5A & P = 3W. I = 5A & P = 5W. I = 5A & P = 25W. I = 5A & P = 9W

11 The voltage across two resistors in series is 10 volts. One resistor is twice as large as the other. What is the voltage across the larger resistor? What is the voltage across the smaller one?

 ${\displaystyle V_{Big-Resistor}=3.33V}$  and${\displaystyle V_{small-Resistor}=6.67V}$ . ${\displaystyle V_{small-Resistor}=5V}$  and ${\displaystyle V_{Big-Resistor}=5V}$ . ${\displaystyle V_{Big-Resistor}=6.67V}$  and ${\displaystyle V_{small-Resistor}=3.33V}$ . None of these are true.

12 A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?

 ${\displaystyle R_{Total}=0.5454\Omega }$ . ${\displaystyle R_{Total}=3\Omega }$ . ${\displaystyle R_{Total}=6\Omega }$ . None of these are true.

13 Two identical resistors are connected in series. The voltage across both of them is 250 volts. What is the voltage across each one?

 ${\displaystyle R_{1}=150V}$  and ${\displaystyle R_{2}=100V}$ . None of these are true. ${\displaystyle R_{1}=125V}$  and ${\displaystyle R_{2}=125V}$ . ${\displaystyle R_{1}=250V}$  and ${\displaystyle R_{2}=0V}$ .

14 A 1 ohm, 2 ohm, and 3 ohm resistor are connected in parallel. What is the total resistance?

 ${\displaystyle {\frac {11}{6}}\Omega }$ . ${\displaystyle {\frac {3}{6}}\Omega }$ . ${\displaystyle {\frac {6}{11}}\Omega }$ . ${\displaystyle {\frac {6}{3}}\Omega }$ .

15 A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?

 ${\displaystyle {\frac {6}{10}}\Omega }$ . ${\displaystyle {\frac {7}{10}}\Omega }$ . ${\displaystyle {\frac {10}{6}}\Omega }$ . ${\displaystyle {\frac {10}{7}}\Omega }$ .

16 A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?

 ${\displaystyle {\frac {21}{10}}\Omega }$ . ${\displaystyle {\frac {11}{7}}\Omega }$ . ${\displaystyle {\frac {7}{11}}\Omega }$ . ${\displaystyle {\frac {10}{21}}\Omega }$ .

17 Three 1 ohm resistors are connected in parallel. What is the total resistance?

 ${\displaystyle 3\Omega }$ . ${\displaystyle {\frac {1}{3}}\Omega }$ . ${\displaystyle {\frac {3}{2}}\Omega }$ . ${\displaystyle {\frac {2}{3}}\Omega }$ .

18 If you put an infinite number of resistors in parallel, what would the total resistance be?

 ${\displaystyle R_{total}}$  would approach zero as the number of resistors in parallel approaches infinity. None of these are true. ${\displaystyle R_{total}}$  would approach 1 as the number of resistors in parallel approaches infinity. It is not possible to connect that number of resistors in parallel.

19

What is the current through R1 and R2 in the figure shown?

 ${\displaystyle I_{1}=0.1A}$  and ${\displaystyle I_{2}=0.1667A}$ . ${\displaystyle I_{1}=10A}$  and ${\displaystyle I_{2}=16.67A}$ . ${\displaystyle I_{1}=1A}$  and ${\displaystyle I_{2}=25A}$ . ${\displaystyle I_{1}=1A}$  and ${\displaystyle I_{2}=1.667A}$ .

20

What is the current through R1, R2, R3, and R4 in the figure shown?

 ${\displaystyle I_{1}=10A}$ ; ${\displaystyle I_{2}=50A}$ ; ${\displaystyle I_{3}=33A}$ ; ${\displaystyle I_{4}=25A}$ .. ${\displaystyle I_{1}=1A}$ ; ${\displaystyle I_{2}=5A}$ ; ${\displaystyle I_{3}=3.3A}$ ; ${\displaystyle I_{4}=2.5A}$ . ${\displaystyle I_{1}=1A}$ ; ${\displaystyle I_{2}=0.5A}$ ; ${\displaystyle I_{3}=0.33A}$ ; ${\displaystyle I_{4}=0.25A}$ . ${\displaystyle I_{1}=0.25A}$ ; ${\displaystyle I_{2}=0.33A}$ ; ${\displaystyle I_{3}=0.5A}$ ; ${\displaystyle I_{4}=0.1A}$ .

21 Two resistors are in parallel with a voltage source. How do their voltages compare?

 The voltage across both resistors is the same as the source. None of these are true. One has full voltage, the other has none. The voltage across both resistors is half the voltage of the source.