Download BLM 5.2 Answer key Ohm`s law worksheet

BLM 5.2 Answer key
Ohm’s law worksheet
Problem #1:
A smartphone with a resistance of 35 ohms has a current of 0.25 amps flowing through it.
Sketch a circuit diagram and calculate how many volts supply the smart phone.
V=
I
x R
= 0.25 A x
35 Ω
= 8.75 V
Problem #2:
A 120-volt power source supplies a computer with a resistance of 210 ohms. What is the
current flow of the circuit?
V
I =
R
= 120 V
210 Ω
= 0.57 A
Problem #3:
Calculate the resistance of the following circuit diagram.
R=
A
Current = 100 A
=
Voltage = 3 V
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Energy Investigations Teacher Resource Guide
V
I
3V
100 A
= 0.03 Ω
Problem #4
What amount of voltage would you need to run a current of 1.2 amps through a 250-ohm
resistor?
V=
I
= 1.2 A
x R
x 250 Ω
= 300 V
Problem #5
Using the given variables, calculate the unknown value:
a.
V = 10 V
R=5Ω
I=2A
b.
V = 3.5 V
R = 10 Ω
I = 0.35 A or 350 mA
c.
V = 10 V
I=2A
R=5Ω
d.
V = 3.5 V
I = 0.5 A
R=7Ω
e.
I = 11 A
R=3Ω
V = 33 V
f.
I=7A
R = 4.5 Ω
V = 31.5 V
Energy Investigations Teacher Resource Guide |
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