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

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A

1. An ideal 5.2 V voltage source is connected to two resistors in parallel. One is 1.2k\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 20m\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 \muW.
b) 5.76 \muW.
c) 6.62 \muW.
d) 7.62 \muW.
e) 8.76 \muW.

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