Understanding PMMC Ammeters and Voltmeters

What is the function of an ammeter in a circuit?

• To measure voltage in a circuit.

• The function of an ammeter in a circuit is to measure the current.

• To store electrical energy.

• To control the flow of electricity.

How do you connect an ammeter to measure current?

• Connect the ammeter to the voltage source directly.

• Place the ammeter across a resistor.

• Connect the ammeter in series with the circuit.

• Connect the ammeter in parallel with the circuit.

Calculate the current flowing through a circuit with a 12V battery and a 4Ω resistor.

• 4A

• 2A

• 3A

• 6A

What is the function of a voltmeter in a circuit?

• The function of a voltmeter in a circuit is to measure voltage.

• To measure resistance in a circuit

• To provide power to the circuit

• To measure current in a circuit

How should a voltmeter be connected to measure voltage across a resistor?

• Connect the voltmeter across the entire circuit.

• Connect the voltmeter in parallel with the resistor.

• Connect the voltmeter to the power source directly.

• Connect the voltmeter in series with the resistor.

If a circuit has a total resistance of 10Ω and a voltage of 20V, what is the current?

• 10A

• 1A

• 2A

• 5A

Explain the difference between series and parallel circuits.

• In series circuits, the voltage is divided, while in parallel circuits, the current is divided.

• Series circuits have multiple paths for current, while parallel circuits have a single path.

• Series circuits can operate independently, while parallel circuits cannot.

• Series circuits have a single path for current, while parallel circuits have multiple paths.

In a series circuit with three resistors (2Ω, 3Ω, 5Ω), what is the total resistance?

• 8Ω

• 12Ω

• 10Ω

• 6Ω

In a parallel circuit with two resistors (4Ω and 6Ω), what is the equivalent resistance?

• 5.0Ω

• 2.4Ω

• 1.5Ω

• 3.0Ω

Using Ohm's Law, if the voltage is 15V and the resistance is 5Ω, what is the current?

• 3A

• 1A

• 5A

• 10A