Electricity and Circuits

What device is used to measure voltage in a circuit?

• Voltmeter

• Ammeter

• Resistor

• Conductor

How is current measured in a circuit?

• Volts per second

• Ohms per second

• Coulombs per second

• Joules per second

In a series circuit, how does the total resistance of two components compare to their individual resistances?

• It is more than the highest individual resistance.

• It is less than the smallest individual resistance.

• It is half the sum of the individual resistances.

• It is the sum of the individual resistances.

What is the total resistance when two resistors of 3 ohms each are connected in parallel?

• 6 ohms

• 3 ohms

• 0.5 ohms

• 1.5 ohms

How do you calculate the total resistance in a parallel circuit with resistors of different values?

• By subtracting the smaller resistance from the larger

• By dividing the sum of the resistances by 2

• By adding the resistances

• By using the formula 1/R = 1/r1 + 1/r2

What are the two main types of electrical circuits?

• Direct and Alternating

• Open and Closed

• Positive and Negative

• Series and Parallel

In a series circuit, how are the components connected?

• End to end

• In a mesh

• Randomly

• Side by side

How is a voltmeter connected in a circuit?

• In parallel

• Across the resistor only

• Not connected

• In series

What does a voltmeter measure?

• Power

• Resistance

• Current

• Voltage

What unit is electric current measured in?

• Joules

• Amps

• Volts

• Ohms