Symmetry in Laws
Trending Questions
Q. A parallel-plate capacitor, with plate area A and separation between the plates d, is charged by a constant current i. Consider a plane surface of area A2 parallel to the plates and drawn symmetrically between the plates. Find the displacement current through this area.
- i4
- Zero
- i2
- i
Q. A toroidal coil of rectangular crossection has an inner radius a, outer radius b, height h and total number of turns N. Current in the toroid is i, and say r is distance of a point from the center of toroid.
- Magnetic field at the point decreases with r for 0 < r < a
- Magnetic field at the point increases with r for a < r < b
- Magnetic field is zero for r > b
- Self inductance of toroid is μ0N2h2πln(ba)