Electrical quantities

Current is defined as...

• work done per unit charge

• rate of flow of charge

• opposition to flow of charge

• work done by energy source on external circuit

Potential difference is defined as...

• work done per unit charge

• rate of flow of charge

• opposition to flow of current

• work done by energy source on external circuit

Resistance is ...

• work done per unit charge

• rate of flow of charge

• opposition to flow of current

• work done by energy source on external circuit

The unit of current is the ...

• ohm

• volt

• coulomb

• ampere

The unit of charge is the ...

• ohm

• volt

• coulomb

• ampere

The equation for p.d. is ...

The symbol for resistivity is ...

• R

• v

p.d. is measured using ....

• an ohmeter

• a voltmeter

• an ammeter

• a coulombmeter

Ammeters should be connected ...

• in parallel

• in series

• in line

• from + to -

An ideal voltmeter has ...

• zero current

• zero resistance

• infinite current

• infinite resistance