Electrostatics & Magnetics Mini Test

In a loop circuit, the total voltage drop across three resistors is 20 V. If the battery supplies 18 V, is there a problem with this circuit? Explain using Kirchhoff's Voltage Law.

• Yes, there is a problem because the total voltage drop should equal the battery voltage according to Kirchhoff's Voltage Law.

• No, there is no problem because the total voltage drop can be greater than the battery voltage.

• Yes, there is a problem because the total voltage drop should be less than the battery voltage.

• No, there is no problem because Kirchhoff's Voltage Law does not apply here.

In a circuit, 5 A and 7 A are entering a junction, while one branch leaves the junction with 8 A. What is the remaining current flowing out of the junction?

• 4 A

• 2 A

• 5 A

• 6 A

At a junction in a circuit, the currents flowing into the junction are 3 A and 2 A. The current flowing out of the junction is 4 A. What is the unknown current flowing out of the junction?

• 1 A

• 2 A

• 3 A

• 0 A

Tags

NGSS.MS-PS2-3

A junction has 10 A flowing into it from one branch. Two currents leave the junction, 4 A and 3 A. What is the current in the remaining branch?

• 3 A

• 2 A

• 5 A

• 6 A

In a simple loop circuit, there are two resistors with voltage drops of 5 V and 7 V, and the total voltage from the battery is 12 V. Does this circuit follow Kirchhoff's Voltage Law?

• Yes, because the sum of voltage drops equals the total voltage.

• No, because the sum of voltage drops does not equal the total voltage.

• Yes, because the voltage drops are less than the total voltage.

• No, because the voltage drops are greater than the total voltage.

A loop in a circuit has a 12 V battery and three resistors with voltage drops of 3 V, 4 V, and an unknown voltage. What is the unknown voltage drop across the third resistor to satisfy Kirchhoff’s Voltage Law? KVL states that the sum of the voltage drops equals the total voltage.

• 5 V

• 2 V

• 6 V

• 7 V

In a closed-loop circuit, the voltage drops across three resistors are 2 V, 6 V, and 5 V. The total voltage supplied by the battery is 15 V. Verify if Kirchhoff's Voltage Law holds in this circuit.

• Yes, Kirchhoff's Voltage Law holds.

• No, Kirchhoff's Voltage Law does not hold.

A loop has two resistors with voltage drops of 4 V and 6 V, and an unknown third voltage drop. The battery supplies 14 V. Calculate the unknown voltage drop.

• 4 V

• 2 V

• 8 V

• 10 V

What is the formula for calculating resistance using Ohm's Law?

• R = V/I

• R = I/V

• R = V*I

• R = I*V

If the current (I) is 4A and the resistance (R) is 3Ω, what is the voltage (V)?

• 12V

• 6V

• 9V

• 15V