Engineering Principles

What is the unit of electromotive force (EMF)?

• ampere

• joule

• coulomb

• volt

What causes a current to flow in a circuit?

• Gravity

• An EMF

• A resistance

• A voltmeter

What value resistor will cause a current of 1 A to flow when 6 V is applied across it?

What will happen to the current in this circuit if two more 1.5 V batteries are added?

• The current will stay the same

• The current will halve

• The current will reduce by one third

• The current will double

• The current will treble

What will happen in this circuit if the 100 Ω resistor is replaced by a 200 Ω resistor?

• Only the voltage will double

• Only the voltage will halve

• Only the current will double

• Only the current will halve

• Both the voltage and current will halve

Which equation correctly links current, charge and time?

• I = Q/t

• Q = I/t

• I = Q + t

• t = I + Q