Current Electricity 2

Define electric current.

• 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 is the formula for current?

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

What does the arrows in the circuit represents?

• conventional current
• electron flow
• eletromotive force
• voltage

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 is the formula for potential difference?

• V = W/Q
• V = Q/W
• V = W/t
• V = Q/t

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

What is the following component?

• fixed resistor
• fuse
• rheostat
• ammeter

Which of the following formula is correct?

• R = V/I
• R = I/V
• R = VI
• R = VI²

Determine the resistance of the light bulb.

• 0.25 Ω
• 1 Ω
• 2 Ω
• 4 Ω

What is the S.I unit for resistance? 

• ohm
• ampere
• volt
• joules