DC Circuits 2

A Series circuit is shown in the picture. The resistors have values of 3Ω and 6 Ω. The ammeter reading is 0.20 A. Calculate the potential difference across the 6 Ω resistor.

Answer explanation

Use R = V/I

The ammeter the picture shown reads 0.2 A. State the current at Z.

Answer explanation

Remember the series circuit rule for current: the current is the same at all points.

The ammeter the picture shown reads 0.2 A. Calculate the potential difference between X and Z.

Answer explanation

Use R = V/I

The ammeter the picture shown reads 0.2 A. Calculate the potential difference between X and Y.

Answer explanation

Since both resistors have the same resistance, they have the same voltage.

Voltage from X to Y is just total voltage of both resistors.

The diagram shows two resistors, A and B, connected in series. The resistance of A is 7.0 Ω.

The ammeter reads 0.20 A. Calculate the potential difference across resistor A.

Answer explanation

Use R = V/I

Using your answer from the previous question, the voltmeter reads 2.0 V, calculate the potential difference across resistor B.

Answer explanation

The voltmeter measures voltage of both resistors = 2.0 V.

Voltage of resistor A = 1.4 V

Voltage of resistor B = 2.0 V - 1.4 V

Using your answer from the previous question, what is the EMF of the cell in this circuit?

Answer explanation

Use series circuit rule for voltage:

EMF = Sum of all V

The diagram shows two resistors, P and Q, in series. The ammeter reads 0.20 A. Voltmeter X reads 1.2 V and voltmeter Y reads 2.0 V.

Calculate the potential difference across resistor P.

Answer explanation

Voltmeter Y is measuring voltage for both resistors = 2.0 V

Voltmeter X is measuring voltage for resistor Q only = 1.2 V

Voltage of resistor P = 2.0 V - 1.2 V

The diagram shows two resistors, P and Q, in series. The ammeter reads 0.20 A. Voltmeter X reads 1.2 V and voltmeter Y reads 2.0 V.

Calculate the resistance of resistor Q.

Answer explanation

Use R = V/I

A Series circuit is shown in the picture. The resistors have values of 3Ω and 6 Ω. The ammeter reading is 0.20 A. Calculate the combined resistance of the two resistors.

Answer explanation

To calculate the total resistance of resistors in series, you add them all.