Name ___________________ # _____ 
Section ________ 
St. Mary's Physics 
Date __________ 
Analyzing Circuits


1. In the circuit diagram shown below, ammeter A1
reads 10. amperes. a) the current in ammeter A2 (hint  find R_{T}, then V_{T} , then I_{1}) 
b) Total resistance =
c) potential difference of the source? 
2. A 20.0volt battery is connected to a 5.0ohm resistor and a 15.0ohm resistor as shown in the diagram below.

a)
What is the current in the 15.0ohm resistor?
b) What is the current in the 5.0ohm resistor?

Analyzing Circuits
3. The diagram below represents an electric circuit consisting of a 12volt battery, a 3.0ohm resistor, R_{1} , and a variable resistor, R_{2} .  a) At what value must the variable resistor be set to produce a current of 1.0 ampere through R_{1} ? 
4. Base your answers to questions a
through c on the information and diagram below. A 20.ohm resistor and a
30.ohm resistor are connected in parallel to a 12volt battery as shown.
An ammeter is connected as shown.

a) What is the equivalent resistance of the circuit?
b) What is the current reading of the ammeter?
c) What is the power of the 30.ohm resistor? 
Analyzing Circuits
5. Base your answers to questions a through d on the circuit diagram below. a) If switch S_{1} is open, the reading of ammeter A is

b) If switch S_{1} is closed, the equivalent resistance of the circuit is
c) find the potential difference across the first resistor
d) find the potential difference across the second resistor

6. The diagram below shows a circuit with two resistors.
a) What is the reading on ammeter A?
b) find the potential difference across the first and second resistor
V_{1} =
V_{2} = 
Analyzing Circuits
7.

b) What is the total current in this circuit? c) What is the potential difference across the first resistor?

The diagram below shows a circuit with three
resistors.

b) What
is the total resistance of the circuit?
c) What is the potential difference across the first resistor? d) What is the potential difference across the second resistor?
