In your experiment you took great care to eliminate the effects of the external
ID: 1625404 • Letter: I
Question
In your experiment you took great care to eliminate the effects of the external magnetic field existing in the room (mostly due the the Earth's magnetic field). This magnetic field was considered to be completely cancelled when the current in the Helmholtz coil was the value referred to as the zero reference current I0. Which of the following statements are correct when the current I0 flows through the Helmholtz coil? Select all that apply.
The orientation of the apparatus is such that the external magnetic field passes through the apparatus at right angles to the plane formed by one of the circular Helmholtz coils.
The orientation of the apparatus is such that the external magnetic field passes through the apparatus parallel to the plane formed by one of the circular Helmholtz coils.
The magnetic field generated by the Helmholtz coil has exactly two times the magnitude as the external magnetic field.
The magnetic field generated by the Helmholtz coil has the exact opposite direction as the external magnetic field.
The magnetic field generated by the Helmholtz coil has the same magnitude as the external magnetic field.
The magnetic field generated by the Helmholtz coil has the same direction as the external magnetic field.
Explanation / Answer
Possible correct answers are
1)the orientation is such that external magnetic field is right angle to apparatus
2)the direction of magnetic field is opposite to external magnetic field
3)the magnitude of both is same
So all these 3 are correct