Direction of magnetic field around a current-carrying conductor
Understanding the Right-Hand Thumb Rule
The right-hand thumb rule, also known as Ampere's rule, is a simple mnemonic used in physics.
- It helps visualize the relationship between the direction of electric current and the direction of the magnetic field it produces.
- This rule specifically applies to a current-carrying conductor, typically a straight wire.
Applying the Rule
To use the right-hand thumb rule:
- Imagine gripping the current-carrying conductor with your right hand.
- Point your thumb in the direction of the electric current flow.
- Your fingers will then curl around the conductor, indicating the direction of the magnetic field lines surrounding it.
Therefore, the right-hand thumb rule is used to find the direction of the magnetic field around a current-carrying conductor.
Evaluating Options
- Option 1 (Resistance): Resistance depends on material, length, and area, not the thumb rule.
- Option 2 (Magnetic Field Direction): This matches the rule's purpose.
- Option 3 (Magnitude of Current): The rule shows direction, not how strong the current is.
- Option 4 (Direction of Force): This is typically found using Fleming's Left-Hand Rule, not the right-hand thumb rule.
The correct application of the right-hand thumb rule is for determining the magnetic field direction associated with current flow.
Important Questions from Magnetism
How many of the following materials can be attracted by a magnet?
1. Plastic
2. Carbon
3. Aluminium
4. Stainless Steel
Select the correct answer using the code given below:
What will happen if a collection of positive and negative charges are passed at a high speed through a magnetic field which is perpendicular to the direction of motion of the charges? (Assume that both kind of charges are NOT going to recombine)
Which scientist suggested that the magnet must also exert an equal and opposite force on the current-carrying conductor?
Paramagnetic substances are-
The magnetic field lines produced inside a long current-carrying solenoid is similar to that of a:
