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

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1 An ideal 5.2 V voltage source is connected to two resistors in parallel series. One is 1.2 , and the other is 2.8  . 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  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  . It is connected to a 3   resistor. What power is developed in the 3   resistor?

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