Resistance

Voltage is measured in __.

• volts.
• watts.
• coulombs. 

As the resistance of a circuit increases, the current will

• increase
• decrease
• stay the same

What is Resistance?

• the degree to which a circuit component opposes the passage of an electric current, causing energy dissipation
• How hard the energy is pushed
• The amount of charges that pass by a given point per second
• None of the above

How does resistance affect current?

• less resistance - less current
• more resistance - less current
• more resistance - more current
• resistance does not affect current

What size resistor would produce a 3 Amp current flow with a 12 Volt battery

• 1 Ohm
• 3 Ohms
• 4 Ohms
• 12 Ohms

What happens to resistance when the length of the wire increases?

• Stays the same

• Increases

• Decreases

What effect does a hotter temperature have on resistance?

• No effect

• Increases resistance

• Decreases resistance

• Stays the same

What other factor of a wire could affect its resistance?

• Material its made of

• How shiny it is

• Colour

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