Current 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 is the SI unit of electric current?

• Watts
• Voltage
• Joules
• Ampere

What do the arrows in the circuit represent?

• conventional current
• eletromotive force
• electron flow
• voltage

Tags

NGSS.HS-PS2-5

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.

What is the following component?

• dry cell
• fuse
• battery
• resistor

What is the following component?

• dry cell
• fuse
• resistor
• rheostat

What is the following component?

• fixed resistor
• variable resistor / rheostat
• fuse
• ammeter

What does the diagram show?

• an open circuit
• a closed circuit
• a short circuit
• a long circuit

Tags

NGSS.HS-PS2-5

What is the formula for current?

• I = t/Q
• I = W/Q
• I = Q/t
• I = W/t