Electric Current and its Effects

What is electric current?

• Electric current is the flow of heat through a conductor.

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

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

• Electric current is the flow of air through a conductor.

What is the SI unit of electric current?

• C

• A

• D

• B

Explain the concept of resistance in an electric circuit.

• Resistance in an electric circuit is not affected by the material of the conductor.

• Resistance in an electric circuit is measured in volts (V).

• Resistance in an electric circuit is the facilitation of electric current flow.

• Resistance in an electric circuit is the opposition to the flow of electric current. It is measured in ohms (Ω) and is caused by factors like the material of the conductor, its length, cross-sectional area, and temperature.

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

• Resistance is equal to the voltage divided by the current (R = V / I)

• Voltage is equal to the current multiplied by the resistance (V = I * R)

• Voltage is equal to the resistance divided by the current (V = R / I)

• Current is equal to the voltage multiplied by the resistance (I = V * R)

Define Ohm's Law.

• Ohm's Law is V = R / I, where V is the voltage, I is the current, and R is the resistance.

• Ohm's Law is V = I * R, where V is the voltage, I is the current, and R is the resistance.

• Ohm's Law is V = I ^ R, where V is the voltage, I is the current, and R is the resistance.

• Ohm's Law is V = I + R, where V is the voltage, I is the current, and R is the resistance.

How does an increase in resistance affect the current in a circuit?

• The current in the circuit increases.

• The current in the circuit decreases.

• The current in the circuit becomes erratic.

• The current in the circuit remains the same.

What is the difference between series and parallel circuits?

• The main difference between series and parallel circuits is how the components are connected and how the current flows through them.

• The color of the wires used

• The temperature at which they operate

• The brand of components used

Explain the concept of electric power.

• Electric power is measured in volts

• Electric power is not related to voltage

• Electric power is the rate at which electrical energy is transferred by an electric circuit, calculated as P = V * I.

• Electric power is the same as electric current

What are the effects of electric current on the human body?

• The effects of electric current on the human body can include burns, muscle contractions, nerve damage, and cardiac arrest.

• Enhanced physical strength

• Improved eyesight

• Increased intelligence

How does a fuse protect an electrical circuit?

• By generating more heat in the circuit

• By reducing the resistance in the circuit

• By increasing the voltage in the circuit

• By melting and breaking the circuit when there is an overcurrent.