Robin has an iron rod around which she wraps copper wire. She places the device on a table near a compass. What will happen to the compass if she sends current through the copper wire?
Responses
The needle of the compass will point toward the device.
The needle of the compass will point toward the device.
The needle of the compass will point at a right angle to the device.
The needle of the compass will point at a right angle to the device.
The needle of the compass will show no effect.
The needle of the compass will show no effect.
The needle of the compass will spin in circles.
The needle of the compass will spin in circles.
The needle of the compass will point at a right angle to the device. This is because sending current through the copper wire creates a magnetic field, which interacts with the magnetic field of the compass, causing it to align at a right angle to the direction of the current.
The needle of the compass will point at a right angle to the device.
The correct answer is: The needle of the compass will point at a right angle to the device.
When a current is passed through the copper wire, it creates a magnetic field around the wire. According to the right-hand rule, the magnetic field generated by the current flows in a circular pattern around the wire.
When the compass is placed near the device with the copper wire, the needle of the compass aligns itself with the magnetic field created by the current. The needle points at a right angle to the device, indicating the direction of the magnetic field.
This phenomenon is known as the Ampere's right-hand rule, which states that if you grip the wire with your right hand, with your thumb pointing in the direction of the current flow, the curled fingers will indicate the direction of the magnetic field around the wire.
So, if Robin sends current through the copper wire, the needle of the compass will point at a right angle to the device.