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Physics: Resistance Change in Lamp

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Questions and Answers

What happens to the resistance of the lamp according to the content?

The resistance increases. (correct)

The resistance remains constant.

The resistance fluctuates unpredictably.

The resistance decreases.

Why does the resistance change in such a way?

The increase in current heats the filament, increasing atomic vibrations which increases resistance. (correct)

The material of the lamp changes its properties at higher currents; reducing resistance.

The increase in current causes a reduction in atomic collisions and decreases resistance.

The increase in current has no impact on the filament temperature or resistance.

What is the immediate effect of increasing the potential difference across the lamp?

A decrease in the lamp's current.

An increase in the lamp's current. (correct)

Unpredictable changes in the lamp's current.

No change in the lamp's current.

If the potential difference across a lamp is increased, what happens to the lamp’s temperature and resistance?

<p>The temperature increases and the resistance increases.</p> Signup and view all the answers

Which statement best describes the relationship between current and resistance in the given context?

<p>As current increases, resistance increases due to thermal energy in the filament.</p> Signup and view all the answers

Study Notes

Resistance Change in Lamp

Increasing the potential difference (p.d.) of the supply leads to a higher current in the lamp.

Statement

The resistance of the lamp increases.

Explanation

The increase in current causes the temperature of the filament in the lamp to rise.
As the filament's temperature rises, its resistance also increases.
This is due to the increased vibrations of the atoms within the filament. These vibrations make it harder for the electrons to flow through the filament.

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Description

Explore the relationship between potential difference, current, and resistance in a lamp. This quiz explains how an increase in current raises the temperature of the filament, subsequently increasing its resistance. Test your understanding of these concepts in the context of electrical circuits.