Electrical Power and Circuits

What is the unit of electric current?

• D

• A

• C

• B

What is the formula to calculate power?

• P = Fd

• P = W/t

• P = V/I

• P = mgh

What is the SI unit of power?

• joule

• volt

• watt

• ampere

What is the resistance of a circuit if a current of 2A flows through it when a potential difference of 12V is applied?

• 6 ohms

• 4 ohms

• 10 ohms

• 8 ohms

What is the relationship between voltage, current, and resistance in a circuit?

• V = I * R

• V = I + R

• V = I ^ R

• V = I / R

What is the function of a fuse in an electrical circuit?

• To regulate the voltage in the circuit

• To increase the current in the circuit

• To protect the circuit from overcurrent

• To prevent the flow of electricity in the circuit

What is the difference between series and parallel circuits?

• In series circuits, the current has multiple paths to follow, while in parallel circuits, the current has only one path to follow.

• In series circuits, the current has only one path to follow, while in parallel circuits, the current has multiple paths to follow.

• Parallel circuits have only one path for the current to follow.

• Series circuits have higher voltage than parallel circuits.

What is the role of an insulator in electricity?

• Increase the flow of electric current

• Have no effect on electric current

• Prevent the flow of electric current

• Generate electric current

What is Ohm's law?

• Ohm's law is used to calculate the speed of light

• Ohm's law is a theory about the behavior of gases at different temperatures

• Ohm's law is a mathematical equation for calculating the volume of a sphere

• Ohm's law relates the voltage, current, and resistance in an electrical circuit.

Explain the concept of electric power.

• The amount of voltage in an electric circuit.

• The rate at which electrical energy is transferred by an electric circuit.

• The color of the electricity in a circuit.

• The speed at which electricity travels through wires.