Electric Current

What is electric current?

• Electric current is the speed of light in a vacuum.

• Electric current is the flow of water through a pipe.

• Electric current is the movement of air in a room.

• Electric current is the flow of electric charge through a conductor.

What is the SI unit of electric current?

• A

• D

• C

• B

Explain the concept of conventional current.

• Conventional current is the flow of positive charge from higher potential to lower potential within a circuit.

• Conventional current is the flow of negative charge from lower potential to higher potential within a circuit.

• Conventional current is the flow of electrons from lower potential to higher potential within a circuit.

• Conventional current is the flow of neutral charge within a circuit.

Describe the flow of electrons in an electric circuit.

• Electrons flow from the negative terminal to the positive terminal of the power source.

• Electrons flow from the positive terminal to the negative terminal of the power source.

• Electrons flow from the positive terminal to the negative terminal of the power source.

• Electrons flow in a random direction within the circuit.

What is the formula to calculate electric current?

• I = V + R

• I = V / R

• I = V * R

• I = R / V

How is electric current measured?

• Counting the number of electrons passing through a wire.

• Using a voltmeter connected in parallel in the circuit.

• Using an ammeter connected in series in the circuit.

• Measuring the temperature of the conductor.

What is the difference between AC and DC current?

• AC current and DC current are the same and have no differences.

• AC current flows in one direction continuously, while DC current changes direction periodically.

• AC current changes direction periodically, while DC current flows in one direction continuously.

• DC current changes direction periodically, while AC current flows in one direction continuously.

What are the factors that affect the flow of electric current?

• Sound, smell, and taste

• Resistance, voltage, and closed circuit

• Color, temperature, and magnetism

• Length, width, and height

Explain the concept of resistance in an electric circuit.

• Resistance is not affected by the material properties of circuit components.

• Resistance in an electric circuit is the opposition to the flow of electric current. It is measured in ohms (Ω) and is caused by the material properties and dimensions of the circuit components.

• Resistance decreases as the current in the circuit increases.

• Resistance is the same as voltage in an electric circuit.

How does the thickness and length of a wire affect the flow of electric current?

• Thicker wires have higher resistance and allow less current to flow, while longer wires have lower resistance and allow more current to flow.

• Thicker wires have lower resistance and allow more current to flow, while longer wires have higher resistance and restrict the flow of current.

• Thicker wires have lower resistance and restrict the flow of current, while longer wires have higher resistance and allow more current to flow.

• Thicker wires have higher resistance and restrict the flow of current, while longer wires have lower resistance and allow more current to flow.