CIT MISC Lab - Ohms Law CISCO Networking Academy 2025

Lab - Ohms Law
Answer the following questions based on electricity and Ohm’s Law. Show all steps when solving
problems.
a. What are the four basic units of electricity? Provide the variable name and symbol, and
unit name and symbol.
Voltage (V),Volt(V)
Current (I), Amps (A)
Resistance (R), Ohms ()
Power (P), Watts (W)
b. Write the equation for Ohm’s Law.
V=IR
c. Re-arrange the Ohm’s Law equation to solve the
following: I = V/R
R = V/I
d. Power is equal to voltage multiplied by current. Add the missing information in each of the
following power equations.
P = VI
P=
RI^2 P
= V2 /R
e. The yellow wire connected to a power supply carries 12V. If the power supply provides
60W of power to the yellow wire, how much current is passing through the yellow wire?
I = P/V = 60W/12V = 5A
f. There are 3.3V passing through an orange power supply cable, and there are 0.25 ohms of
resistance in the orange wire. How much power is supplied to the orange wire by the
power supply?
P = V2/R = 3.3V X 3.3V/.25 = 43.56W
go.f DAo cwui rme ef nr ot m the power supply is carrying 120W of power and 24A of current. How
much power is supplied to the wire by the power supply?
V = P/I = 120W/24A = 5V
h. The wire color is either Red or White.




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