Magnetic Fields and Forces

Question 1

What rule is used for Current Carrying Wires?

Answer 1

Right Hand Rule

Question 2

What does a Cross and a Dot mean?

Answer 2

Cross - Field into Page
Dot - Field out of Page

Question 3

When is Fleming’s Left Hand Rule used?

Answer 3

When a wire is within an electric field

Question 4

What is the equation for Force?

Answer 4

F = BIL or F=Bqv

Question 5

Equation for Current

Answer 5

I = Q/t

Question 6

Equations for a Circular orbit

Answer 6

r = mv/BQ, frequency = BQ/2pim

Question 7

Equation for Magnetic Flux

Answer 7

BA

Question 8

Units for Magnetic Flux

Answer 8

Wb

Question 9

What happens when a conductor moves through an electric field?

Answer 9

A voltage is induced (e.m.f)

Question 10

How can you increase the e.m.f?

Answer 10

Increase the flux linkage by increasing the number of field lines cut.

Question 11

What is the Flux Linkage of a Solenoid?

Answer 11

NBA or N*MagneticFlux

Question 12

Equation for Flux Linkage at an angle?

Answer 12

NBACos()

Question 13

When is there maximum flux linkage?

Answer 13

When theta = 0

Question 14

Equation for Magnetic Flux at an angle?

Answer 14

BAcos()

Question 15

How to find magnetic field inside a solenoid?

Answer 15

Hall Probe

Question 16

Equation for Magnetic Field inside a solenoid

Answer 16

(4pix10-7)IN/L

Question 17

Magnetic Field in a coil

Answer 17

(4pix10-7)I/2pir

Question 18

Equation for two parallel current carrying wires

Answer 18

(4pix10-7)I1I2L