Which of the following is the correct unit for potential difference?

How many millivolts are there in 0.5 volts?

Benjamin wants to find out the resistance of a resistor. He connects the resistor to a variable potential difference power source and uses an ammeter to find the current through the resistor. His results are shown in the table. What is the resistance of the resistor?

Ammeters should always be connected in________ .

Voltmeters should always be connected in ________.

The diagram shows an electric circuit consisting of a cell and a bulb. If the potential difference across the bulb is 1 volt and the current through the bulb is 1 ampere,what is the resistance of the bulb?

If a component in a circuit has lower electrical resistance, is it easier or harder for charges to move through it?

Which of the following is the correct definition of an electrical conductor?

Four identical resistors are placed in series in a circuit. The resistance of all four resistors together is 36 Ω.What is the resistance of each resistor individually?

A battery supplying 12 V is connected in series with two resistors. The potential difference across the first resistor is 4 V.What is the potential difference across the second resistor?

Three identical resistors are connected in series in a circuit. A voltmeter is used to measure the potential difference across all three of them, and it is found to be 18 V.What is the potential difference across each resistor individually?

The circuit in the diagram consists of two resistors in series, with ammeters, $$A_1$$  , $$A_2$$ ,and $$A_3$$ ,placed at different points in the circuit. $$A_1$$ reads 4 A.What is the current given by the second ammeter, $$A_2$$ ?What is the current given by the third ammeter, $$A_3$$ ?

A student sets up the circuit shown in the diagram. She uses a voltmeter to measure the potential difference across $$R_1$$   and finds it to be 4 V. She then uses a voltmeter to measure the potential difference across $$R_2$$   and finds it to be 10 V. What is the potential difference across both resistors together?

The circuit in the diagram consists of two resistors in series. What is the total resistance of the two resistors?

A student sets up the circuit shown in the diagram. If the value of 𝑅 is 3 Ω,what is the current through the circuit?

The circuit shown in the diagram consists of three resistors connected in series with a cell. The first resistor has a resistance of 𝑅,the second resistor has a resistance of 2𝑅,and the third resistor has a resistance of 3𝑅.The cell provides a potential difference of 24 V.The current through the circuit is 0.1 A.What is the value of 𝑅?

The diagram shows a circuit consisting of a cell and two resistors connected in series. If the total resistance of the circuit is 20 Ω,what is the value of 𝑅?

The diagram shows two circuits. Are the two circuits equivalent to each other? If not, then why?

The diagram shows four circuits with components connected in parallel. Which two circuits are equivalent?

Elizabeth sets up the circuit shown in the diagram. The current through the first ammeter, $$I_1$$  ,is 5 A.What is the value of $$I_{total}$$  ?Give your answer to 1 decimal place.

A student sets up the circuit shown in the diagram. Initially, the switch is open. When the student closes the switch, will the current flowing through the circuit increase or decrease?

The circuit shown in the diagram consists of two resistors connected in parallel to a cell. The value of $$I_{total}$$   is equal to 30 A.What is the value of $$I_2$$  ?

The circuit shown in the diagram consists of two resistors connected in parallel to a cell. The value of the current given by the second ammeter, $$I_2$$  ,is 3 A.What is the value of $$I_{total}$$  ?

A student sets up the circuit shown in the diagram. The three resistors are identical. The value of $$I_{total}$$   is 15 A.What is the value of $$I_3$$  ?

A student sets up the circuit shown in the diagram. The value of $$I_{total}$$   is 8 A and the value of $$I_1$$   is 6 A.

What is the value of $$I_2$$  ?

What is the potential difference supplied by the cell to the circuit?

The diagram shows two resistors connected in parallel to a cell. If the potential difference across the 3 Ω resistor is 18 V,what is the potential difference across the 6 Ω resistor?