ET 26104

ET 26104

12th Grade

12 Qs

quiz-placeholder

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ET 26104

ET 26104

Assessment

Quiz

Professional Development

12th Grade

Medium

Created by

Johnathan Swing

Used 8+ times

FREE Resource

12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

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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