If the current in a wire is doubled, how does the magnetic field at a point 5 cm away from the wire change?
Practice Questions
1 question
Q1
If the current in a wire is doubled, how does the magnetic field at a point 5 cm away from the wire change?
It doubles
It quadruples
It remains the same
It halves
According to Biot-Savart Law, the magnetic field is directly proportional to the current. Therefore, if the current is doubled, the magnetic field also doubles.
Questions & Step-by-step Solutions
1 item
Q
Q: If the current in a wire is doubled, how does the magnetic field at a point 5 cm away from the wire change?
Solution: According to Biot-Savart Law, the magnetic field is directly proportional to the current. Therefore, if the current is doubled, the magnetic field also doubles.
Steps: 6
Step 1: Understand that a wire carrying current creates a magnetic field around it.
Step 2: Know that the strength of the magnetic field depends on the amount of current flowing through the wire.
Step 3: Remember the Biot-Savart Law, which states that the magnetic field is directly proportional to the current.
Step 4: If the current in the wire is doubled, it means there is now twice as much current flowing.
Step 5: Since the magnetic field is directly proportional to the current, if the current is doubled, the magnetic field will also double.
Step 6: Conclude that at a point 5 cm away from the wire, the magnetic field will be twice as strong as it was before.
