Current of electricity

Define electric current. 

• It is the work done by the source in driving charges around a complete circuit.
• It is a measure of the rate of flow of electric charge through a given cross-section of a conductor.
• It is the work done by the source in driving a unit charge around a complete circuit.
• It is a measure of the flow of electric charge through a given cross-section of a conductor.

What does the arrows in the circuit represents?

• conventional current
• eletromotive force
• electron flow
• voltage

Which instrument is shown in the picture?

• voltmeter
• ammeter
• galvanometer
• multimeter

What is the function of a dry 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.

Define electromotive force.

• It is the work done by the source in driving charges around a complete circuit.
• It is the work done by the source in driving a unit charge around a complete circuit.
• It is a measure of the rate of flow of electric charge through a given cross-section of a conductor.
• It is a measure of the flow of electric charge through a given cross-section of a conductor.

What does the voltmeter reading show?

• The eletromotive force of the electrical source
• The electromotive force of the bulb
• The potential difference across the bulb
• The potential difference across the electrical source

• 2.1 A

• 75.6 A

• 0.5 A

• 15 A

• 3 V

• 20 V

• 75 V

• 275 V

if 50C of charge flows though a point in 10 sec, what is the current passing through that point?

• 0.2A

• 5A

• 60A

• 500A

What does 5A refer to?

• 5 Coulombs of charge flows through a point in 1 second

• 5V of electricity across 1 ohm of resistance

• 5V of electricity causing 1C of charge to flow

• 5C of charge flowing through a point