Question

Pick out the wrong statement:

• A. In a simple battery circuit, the point of lowest potential is the negative terminal of the battery.
• B. The resistance of an incandescent lamp is greater when the lamp is switched off.
• C. An ordinary 100 W lamp has less resistance than a 60 W lamp.
• D. At constant voltage, the heat developed in a uniform wire varies inversely as the length of the wire used.

Hint:

The resistance of a lamp decreases as its power rating increases at the same voltage.

Answer 1

The Correct Option is C

Step 1: Understanding the resistance of lamps.
For a given voltage, power is inversely proportional to resistance. Since \( P = \frac{V^2}{R} \), the 100 W lamp will have a lower resistance than the 60 W lamp.
Step 2: Explanation.
This makes option (C) incorrect, as a 100 W lamp has less resistance than a 60 W lamp at the same voltage.
Final Answer: \[ \boxed{\text{C}} \]