6C.3 Magnetic forces

Question 1

force on a wire in a magnetic field is

Answer 1

BILsin@

Question 2

how can you set up an apparatus to investigate magnetic field on a wire with a current

Answer 2

page 62

Question 3

what is magnetic field strength in uniform parallel lines

Answer 3

F = BIL (cause sin90=1)

Question 4

how can we make a motor faster or more powerful

Answer 4

1. increase the I through the motor
2. increase the number of turn on the wire
3. increase the magnetic field

Question 5

to maximize the magnetic field coils core need to be made up from

Answer 5

soft iron (easy magnetizable)

Question 6

when does the motor effect happen

Answer 6

when a charged particle move at right angles to the magnetic field and experiences a force at right angles to its motion

Question 7

if a charged particle is constrained while in the motor effect

Answer 7

the force will go to the wire

Question 8

if a charged particle moves freely in a magnetic field

Answer 8

its direction will change and it will travel in a circular path while in the magnetic field

Question 8

what is the equation for the force acting on a charged particle in a magnetic field

Answer 8

F = Bqv

Question 9

how can you investigate how much force will be on an electron in a magnetic field

Answer 9

by using the equipment in fig C.. (PAGE 63), where the grid allows you to view the path travelled by the electrons, and there is a standard formula used to find the magnetic field strength provided by a pair of parallel electromagnetic coils, often referred to Helmholtz coil

Question 10

what is a safety note that should be taken when using power supplies

Answer 10

1. the power supplies should be used with a shrouded connectors
2. don’t remove or attach connectors while the power is own

Question 11

what us the danger of using power supplies

Answer 11

severe electric shock

Question 12

how can an electron in a magnetic field be in circular orbit

Answer 12

if the force acting on the electrons is always at right angles with the direction of its velocity, it is traveling at a circular orbit , as the electrons velocity is being changes its being accelerated by the magnetic field, meaning that at the right conditions an electron (or any charged particle) can be held by the magnetic field orbiting a central point. ie Fc, this is the principle in which dark artificially generated dark matter is contained