Final answer:
d it will use an index handshape. The correct answer to the student's question is d) it will use an index handshape, which refers to the application of the right-hand rule in physics to determine the direction of the magnetic field around a current-carrying conductor.
Step-by-step explanation:
The student's question relates to determining the direction of the magnetic field created by an electrical current, which is a fundamental concept in Physics, specifically in the study of electromagnetism. The true statement about signing "i" (which in this context refers to the current, I) is d) it will use an index handshape.
When using the right-hand rule to determine the direction of the magnetic field around a current-carrying conductor, you point your right-hand thumb in the direction of the electrical current (I). Then you curl your fingers; the direction in which the fingers wrap around the conductor represents the direction of the magnetic field lines encircling it. If the current is flowing in the same direction as your extended thumb, then according to the right-hand rule, the current is positive. Conversely, if the current flows opposite to your thumb's direction, the current would be considered negative.
Furthermore, the right-hand rule helps you understand the interactions between a current (I), a magnetic field (B), and the resulting force (F) when using a magnetic field to exert a force on a charged particle like an electron or a current-carrying wire. In this case, the thumb points in the direction of the current (I), the fingers point in the direction of the magnetic field (B), and the resultant force (F) is perpendicular to the palm.
Remember, the handshape used in signing for this principle is an index finger extended to represent the direction of the current, hence answer choice d) is the correct one.