I need help understanding these physics problems

Multiple Choice (10 points) 1. Which is the correct description for how an electric generator works? A) A coil of wires that is free to rotate sits in an electric field generated by static charges. Some external force, such a water falling down a dam or rising steam, rotates the coil of wires. This rotation changes the angle between the electric field and the surface area of the coils. This causes a change in electric flux, which induces a voltage due to Faraday's Law. The voltage can then be used for electricity. B) A coil of wires that is free to rotate sits in a magnetic field generated by permanent magnets. Some external force, such a water falling down a dam or rising steam, rotates the coil of wires. This rotation changes the angle between the magnetic field and the surface area of the coils. This causes a change in magnetic flux, which induces a voltage due to Faraday's Law. The voltage can then be used for electricity. C) A coil of wires that is free to rotate sits in a magnetic field generated by permanent magnets. Some external force, such a water falling down a dam or rising steam, rotates the coil of wires. This rotation changes strength of the magnetic field. This causes a change in magnetic flux, which induces a voltage due to Faraday's Law. The voltage can then be used for electricity. D) A coil of wires that is free to rotate sits in a magnetic field generated by permanent magnets. A current flows through the coil of wire. Segments of the wire experience a magnetic force. The net force on the coil is 0, but the net torque is not 0. This torque causes the coil of wire to rotate. The rotation of the loop can be used to accomplish mechanical tasks, like rotating the wheels of a car. 2. Which of the following will satisfy the condition for resonance in an LRC circuit? A) Inductance is equal to capacitance B) Inductance is equal to one divided by the capacitance C) The reactive inductance is equal to the reactive capacitance D) The impedance is maximizedMatch the picture with the corresponding direction. You are looking for the direction of the variable in the picture with the question mark. The x-direction points to the right, the y-direction points to the top of the page, and the z- direction points out of the page. 3. i or +x-direction 4. -i or -x-direction 5 . _ j or +y-direction 6. -j or -y-direction 7. k or +z-direction 8. -k or -z-direction I a d. B-? I B =