If a circuit has a voltage of 240V across two parallel branches with current loads of 20A and 25A, what is the total current?
ET 26104

Quiz
•
Professional Development
•
12th Grade
•
Medium
Johnathan Swing
Used 8+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5A
20A
25A
45A
Answer explanation
According to Kirchhoff's Law total current will be the sum of the currents through each branch.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
There are four resistors in a series circuit with an applied voltage of 120V. The voltage drop across the three resistors is 10V each. What is the voltage drop across the fourth resistor?
10V
30V
90V
120V
Answer explanation
According to Ohms law the sum of the voltage drops in any SERIES circuit is always EQUAL to the voltage applied to the circuit.
Applied Voltage: 120V = 10V + 10V + 10V + 90V
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the current flowing through a light bulb that uses 10W of power when placed across a 20V battery?
0.5A
2A
10A
200A
Answer explanation
Given that the light bulb uses 10W of power when placed across a 20V power source, we can us the Expanded Ohms Law Wheel and rearrange the formula to solve for I:
I = P/V.
Plugging in the values, I = 10W/20V = 0.5A.
Therefore, the current flowing through the light bulb is 0.5A
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a circuit with a source of 240v is connected across three parallel 40 ohm resistors, what is the current through EACH resistor?
2A
6A
18A
40A
Answer explanation
Using Ohm's Law wheel simply use the formula to find current since all three resistors have the same value of resistance of 40 ohms.
I=E/R or Current= Voltage/Resistance
6A=240V/40ohms
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a circuit has a voltage of 120V across two parallel branches with current loads of 10A and 20A, what is the total circuit current?
2A
4A
30A
40A
Answer explanation
According to Kirchhoff's Law the total current in a parallel circuit can be found by adding each of the individual branch current values.
10A + 20A = 30A total
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the current flowing through a hair dryer that uses 1,200W of power with an applied voltage of 120v?
0.1A
10A
12A
120A
Answer explanation
Using the expanded Ohm's Law wheel the formula to find current when having the values of power and voltage are as follows:
1,200w divided by 120v = 10amps
P/E= I
Power in watts / Voltage = Current
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to Kirchhoff's current law, what is the total current in a parallel circuit equal to?
the total voltage drop
the average currents in each branch
the sum of the currents in each branch
the voltage difference between each branch
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