Resistance

Resistance determines how easily electric current flows through materials. High resistance hinders current flow, while low resistance facilitates it. Conductors have low resistance, whereas insulators have high resistance. Resistance is crucial in circuits, affecting how components like light bulbs and heating elements function. Ohm's Law explains the relationship between voltage, current, and resistance. Resistance is measured in ohms and can cause heat loss, especially in long wires, but also provides safety by preventing electric shocks. Insulators like rubber gloves protect against electrical hazards.

What happens to the flow of electric current when resistance is high?

• The current becomes constant.

• The current flow is unaffected.

• The current flow is hindered.

• The current flows easily.

Which of the following is true about a good conductor?

• It has high resistance.

• It has low resistance.

• It does not conduct electricity.

• It is an insulator.

How does adding a component like a light bulb affect a circuit?

• It makes the circuit more efficient.

• It has no effect on the circuit.

• It increases the circuit's resistance.

• It decreases the circuit's resistance.

What does Ohm's Law relate?

• Current, power, and energy

• Resistance, power, and energy

• Voltage, current, and resistance

• Voltage, current, and power

How can resistance be beneficial for safety?

• By reducing the voltage

• By increasing the current flow

• By enhancing power loss

• By preventing electric shocks