If a calculated quantity has units of T • m/A, that quantity could be
Answer choices
a magnetic torque.
1.0.
2.an electric field.
3.an electric potential.
4.a magnetic field.
To determine which quantity has units of T • m/A, we need to understand the meaning of each unit involved.
- The unit "T" refers to tesla, which is the unit of magnetic field strength.
- The unit "m" refers to meters, which is the unit of length.
- The unit "A" refers to amperes, which is the unit of electric current.
Now, let's analyze the answer choices:
1. Magnetic Torque: Torque is the product of force and the perpendicular distance from the axis of rotation. The unit of torque is N • m (newton meter), not T • m/A. Therefore, this is not the correct choice.
2. 1.0: This is not a physical quantity, but a numerical value or scalar. Therefore, this is not the correct choice.
3. Electric Field: Electric field is a physical quantity that measures the force experienced by a charged particle in an electric field. The unit of electric field is N/C (newton per coulomb), not T • m/A. Therefore, this is not the correct choice.
4. Electric Potential: Electric potential measures the electrical potential energy per unit charge at a point in an electric field. The unit of electric potential is V (volt), not T • m/A. Therefore, this is not the correct choice.
The correct answer is:
4. A magnetic field: Magnetic field is a physical quantity that measures the strength and direction of a magnetic field. The unit of magnetic field is T (tesla). Therefore, a quantity with units T • m/A could represent a magnetic field.