Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Current Electricity

Question:

Assertion : The 200 W bulbs glow with more brightness than 100 W bulbs.
Reason : A 100 W bulb has more resistance than a 200 W bulb.

Options:

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Both (A) and (R) are correct but (R) is NOT the correct explanation of (A).

(A) is true but (R) is false.

Both (A) and (R) are false.

Correct Answer:

Both (A) and (R) are correct and (R) is the correct explanation of (A).

Explanation:

$P = \frac{V^2}{R}$

  • electric power is inversely proportional to the resistance i.e. more is the resistance less will be the power and vice-versa.
  • Since 200 W bulb will have less resistance as compared to 100 W thus it will glow brightly.