LSS - Chapter 13 Electrical Systems

What is the SI unit of current?

• Ohm

• Volt

• Ampere

• Watt

The instrument that measures electric current is called a/an __________.

• resistor

• voltmeter

• ammeter

• electrometer

What is the formula for current?

Which is the symbol for a variable resistor?

• A

• B

• C

• D

When the switch is open, which lamp(s) will remain on?

• X only.

• Y and Z only.

• X and Z only.

• X, Y and Z only.

A higher resistance in a circuit results in a _________.

• higher voltage

• lower voltage

• larger current

• smaller current

What is the total effective resistance in the circuit?

Which diagram shows three resistors connected in parallel?

• A

• B

• C

• D

What is the SI unit for power?

• volt

• joule

• watt

• newton

A fuse is always connected to the ______ wire in a plug.

• live

• neutral

• earth

• main