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Series and Parallel Circuits
Based on the information learned, the following relationships can be stated for:
Problems
Directions:
The data given in each problem is sufficient to solve for the unknown quantity or quantities.
Draw a circuit diagram for each problem where the circuit is not already drawn. Each battery
consists of three (3) cells connected in series.
Calculate the missing current in problems 1, 2 & 3.
1:
One battery which puts out a current of 15 A. Two resistors in parallel, with the first resistor having a
current of 9 A passing through it. What is the current passing through the second resistor?
2:
One battery which puts out a current of 10 A. Three resistors in parallel, with the first resistor having
a current of 2.5 A passing through it and the second resistor having a current of 3.5 A passing through
it. What is the current passing through the third resistor?
3:
Calculate the missing potential difference in problems 4, 5 & 6.
4:
One battery with a potential difference of 120 V. Four resistors in series, with the second and third
resistors having a potential difference each of 25 V and the fourth resistor having a potential
difference of 35 V. What is the potential difference of the first resistor?
5:
One battery and four resistors in series, with the first resistor having a potential difference of 10 V,
the second resistor having a potential difference of 35 V, the third resistor having a potential
difference each of 45 V and the fourth resistor having a potential difference of 20 V. What is the
potential difference of the battery?
6:
One battery with a potential difference of 9 V and three resistors in parallel. What is the potential
difference across resistor number 2
Calculate the missing quantities in problems 7, 8, 9, 10 & 11.
7:
One battery with a potential difference of 40 V and two resistors in series. Resistor one has a
resistance of 10  and has 2 A of current passing through it. What is the potential difference across
resistor 1 and resistor 2 and what is the resistance value of resistor 2? Calculate the overall equivalent
resistance (Requivalent) for this circuit.
8:
Calculate the overall equivalent resistance (Requivalent) for this circuit.
10:
One battery with a potential difference of 12 V and two resistors in series. The circuit has 1.5 A of
current leaving the battery and resistor two has a potential difference of 4.5 V. What is the potential
difference across resistor one and what are the resistance values for resistors one and two? Calculate
the overall equivalent resistance (Requivalent) for this circuit.
11:
One battery with a potential difference of 40 V and three resistors in parallel. Resistor one has 20 A
of current flowing through it, resistor 2 has a resistance of 6  and resistor three has a resistance of 4
. What is the potential difference across resistors 1 and 2, what is the resistance value for resistor
one, and give the current passing through resistors two and three? Calculate the overall equivalent
resistance (Requivalent) for this circuit.