Current, Voltage and Resistance

The resistance of a component in a circuit is found using an ammeter and a voltmeter. How are the ammeter and the voltmeter connected?

• the voltmeter and ammeter in parallel with the component

• the voltmeter and ammeter in series with the component

• the voltmeter in parallel with the component and the ammeter in series with the component

• the voltmeter in series with the component and the ammeter in parallel with the component

What is the current in an electric circuit?

• The energy of the circuit

• The flow of electrons in the circuit

• The power of the circuit

If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage difference across the light bulb?

• 5 V

• 12 V

• 0.2 V

• 20 V

What would the circuit resistance be if a 7.5 Amp draw was present with the engine running and the charging system producing 15 Volts

• 15 Ohms

• 4 Ohms

• 0.3333 Ohms

• 2 Ohms

A Charging system producing 14.5 Volts with a current flow of 43.5 Amps, what is the circuit resistance

• 58 Amps

• 0.33 Amps

• 13 Amps

• 1 Amp

Which wire has the smallest resistance?

• A

• B

• C

• D

Which equation can be used to calculate the resistance R of a resistor?

• V = I / R

• I = V x R

• R = V x I

• V = I x R

Current has units: 

• kilowatt·hour 

• ampere 

• coulomb 

• volt 

What is Resistance?

• The flow of electrons

• Electric potential difference

• A measure of the opposition to current flow in an electrical circuit.

This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?

• 3 Amps

• 4 Amps

• 2 Amps