1. A non-magnetic bar of metallic aluminum is dropped vertically downward. As it falls it passes through a region with an inclined magnetic field that makes 45 degrees with the vertical axis z. The bar moves as a freely falling object - False, but I need an explanation.
2. A long fine wire is cut in half and the two halves are wound into coils with L1 = 5mH; L2 = 10mH. When connected to the same battery in parallel, each coil will carry different currents after a few seconds. - False, but I need an explanation.
3. For a certain choice of frequency parameters (R, L, C, w), it is possible to produce a phase angle in a series RLC AC circuit that is equal to 90 degrees. - False, but I need an explanation.
For the above True/False questions, I have the correct answer, but I would love some explanations as to why they are correct. I'm not sure myself. Thanks!
The falling non magnetic bar induces a magnetic field in itself due to the changing magnetic flux through it while falling down and thus the already present magnetic field interacts with the bar and it's acceleration does not remains = 9.8 m/S2
3) phase angle of 90 degrees means power factor = 0 that is cos 90 = 0 = R/z
Where z is the impedance of the circuit.
Now R (resistance cannot be zero) and thus 90 degrees of phase angle is not possible
1. A non-magnetic bar of metallic aluminum is dropped vertically downward. As it falls it passes...