Question

According to 'Right hand thumb rule', if thumb of a right hand indicates direction of current passing through a straight conductor, then curled fingers of the same hand represent

• A. Direction of magnetic field
• B. Resistance
• C. Direction of induced emf
• D. None of these

Answer 1

The Correct Option is A

To solve the problem, we need to understand what the curled fingers of the right hand represent in the Right Hand Thumb Rule.

1. Understanding the Right Hand Thumb Rule:
According to the Right Hand Thumb Rule, if the thumb of your right hand points in the direction of the current in a straight conductor, then the direction in which your fingers curl represents the direction of the magnetic field lines around the conductor.

2. Application of the Rule:
- Thumb → Direction of current
- Curled fingers → Circular magnetic field lines

3. Elimination of Other Options:
- Resistance is not indicated by this rule
- Direction of induced emf is related to Faraday’s law and Fleming’s right hand rule
- "None of these" is incorrect since the correct answer is option 1

Final Answer:
The curled fingers represent the Direction of magnetic field.