emf and Potential difference

Current and Potential difference

By Angela Toh

Multiple Choice

It is an energy supply by a battery/ electrical source to a unit of charge.

This refers to

• Potential difference

• Internal resistance

• Electromotive force

• Current

Multiple Choice

EMF is an abbreviation of

• Electromotive force

• Electric motive force

• Electrical motive force

• Both a and b

Multiple Choice

Instrument which transfers energy to electric charge in a circuit is

• Battery

• Voltmeter

• Ammeter

• Galvanometer

Multiple Choice

What is the function of a cell?

• A conductor that connect the components together.

• A method of opening or closing the circuit.

• A source of electromotive force that drives electric charges around the circuit.

• A load in which moving charges can do a useful job.

Multiple Choice

What is emf?

• the electro motive "force" or the force on electrons

• the electromotive "force" or the Voltage of a cell measured when there is no current flowing

• the electromotive "field" or the Voltage of a cell measured when there is no current

• the electromotive "force" or Voltage of a cell measured when connected to a circuit

Multiple Choice

It is a work done or energy supply to move a unit of charge from 1 point to another point in a closed circuit

This refers to

• Internal resistance

• Potential difference

• Electromotive force

• Resistance

Multiple Choice

Define potential difference

• the work done, W in moving one coulomb of charge, Q from one point to another.

• the work done, W in moving one CURRENT of charge, Q from one point to another.

• the work done, W in moving one VOLTAGE of charge, V from one point to another.

Multiple Choice

Energy transfer per unit charge is

• E.M.F

• Current

• Potential difference

• Conventional current

Multiple Choice

What is this the definition of: the energy per charge (voltage) supplied by a source e.g. battery

• emf

• Potential difference

• Voltage

• Current

Multiple Choice

A voltmeter arranged across the power supply measures

• Potential difference

• E.M.F

• Current

• Resistance

Multiple Choice

Voltage is measured in __.

• volts.
• watts.
• coulombs. 

Multiple Choice

Define potential difference

• The amount of energy per charge

• The amount of charge per energy

• The amount of charge per second

• The amount of voltage per second

Multiple Choice

How must a voltmeter be connected?

• In series

• In parallel

• To a power supply

Multiple Choice

The difference in electrical potential energy between two places is called

• resistance
• friction
• induction
• voltage or potential difference

Draw

Label two points on this electrical circuit.

H for higher electrical potential

L for lower electrical potential

Draw

Label two points on this electrical circuit.

H for higher electrical potential

L for lower electrical potential