Chapter 16 Electromagnetism

Question 1

Magnetic field

Answer 1

Region of space in which a magnetic material current carrying conductor or moving charge may experience a force.

Question 2

Magnetic flux density formulas

Answer 2

Straight wire:
B = µ₀I/2πd

Flat circular coil:
B = N µ₀I/2r

Solenoid:
B = µ₀nI

Question 3

Magnetic flux density

Answer 3

First per unit length exerted on a long straight conductor carrying a unit current that is placed perpendicular to the magnetic field

F = BILsinθ

Question 4

Force on a moving charge in a magnetic field

Answer 4

F = Bqv sinθ

Question 5

How does a velocity selector work

Answer 5

For beam of charged particles having a range of velocities, only those moving with v= E/B remain undeflected. Hence only particles of this particular velocity will emerge at the slit while the rest are blocked.