Basic Electricity

It is a difference in electric potential energy in joule/coulomb.

• circuit

• current

• resistance

• voltage

What is the SI unit of voltage?

• ampere

• ohm

• volt

• watt

It is the number of charges passing through a wire per unit time.

• current

• power

• resistance

• voltage

What is the SI unit of current?

• ampere

• ohm

• volt

• watt

It is the opposition to the flow of electric charges as they travel through a conducting wire

• circuit

• current

• resistance

• voltage

What is the SI unit of resistance?

• ampere

• ohm

• volt

• watt

Which of the following is the correct statement of Ohm’s Law?

• When current increases in a circuit, voltage increases and resistance increases.

• When current increases in a circuit, voltage decreases and resistance increases.

• When current increases in a circuit, voltage increases while resistance remains constant.

• When current decreases in a circuit, voltage decreases and resistance increases.

It supplies energy in an electric circuit.

• load

• switch

• source

• conducting wire

It converts electrical energy into different forms of energy such as light, heat, or sound in an electric circuit.

• load

• switch

• voltage source

• conducting wire

According to Ohm’s law, across a resistor with constant resistance, what happens to the current across it when the voltage applied is halved?

• halved

• doubled

• quadrupled

• remains the same