# Physics equations/21-Circuits, Bioelectricity, and DC Instruments/Q:circuits

## A

1 An ideal 5.2 V voltage source is connected to two resistors in parallel series. One is 1.2$k\Omega$ , and the other is 2.8 $k\Omega$ . What is the current through the larger resistor?

 a) 0.7 mA. b) 0.9 mA. c) 1.1 mA. d) 1.3 mA. e) 1.5 mA.

2 A 7.7 ohm resistor is connected in series to a pair of 5.8 ohm resistors that are in parallel. What is the net resistance?

 a) 6.1 ohms. b) 7 ohms. c) 8 ohms. d) 9.2 ohms. e) 10.6 ohms.

3 Two 8 ohm resistors are connected in parallel. This combination is then connected in series to a 6.6 ohm resistor. What is the net resistance?

 a) 9.2 ohms. b) 10.6 ohms. c) 12.2 ohms. d) 14 ohms. e) 16.1 ohms.

4 An ideal 7.9 volt battery is connected to a 0.09 ohm resistor. To measure the current an ammeter with a resistance of 20$m\Omega$ is used. What current does the ammeter actually read?

 a) 71.8 A. b) 82.6 A. c) 95 A. d) 109.2 A. e) 125.6 A.

5 A battery has an emf of 5.3 volts, and an internal resistance of 326 $k\Omega$ . It is connected to a 3 $M\Omega$ resistor. What power is developed in the 3 $M\Omega$ resistor?

 a) 5.01 $\mu$ W. b) 5.76 $\mu$ W. c) 6.62 $\mu$ W. d) 7.62 $\mu$ W. e) 8.76 $\mu$ W.