physics

Question 1

a magnetic field is a region where magnetic materials experience……

Answer 1

a force

Question 2

What are magnetic field lines used for?

Answer 2

to show the magnetic field lines

Question 3

North to south or south to north

Answer 3

North to south

Question 4

Is the field uniform when placing two magnetics next to each other

Answer 4

yessir

Question 5

does north attract north

Answer 5

nosir

Question 6

do both poles attract magnetic materials

Answer 6

yessir

Question 7

Name 3 magnetic materials

Answer 7

Iron, cobalt, nickel

Question 8

When magnetic materials are brought near to a magnets magnetic field, that materials…

Answer 8

acts like a magnet

Question 9

When is the magnetism induced?

Answer 9

When a magnetic material is brought near a magnet.

Question 10

how do i get to increase the magnetic inducement?

Answer 10

get the magnet close.

Question 11

what are two ways you could see the magnetic field lines of a bar magnet

Answer 11

1) compasses
2) iron fillings

Question 12

What does an electric current in a current create

Answer 12

a magnetic field around it

Question 13

What is the magnetic field dependent on

Answer 13

the direction of the current

Question 14

what is a straight current carrying wire made up of

Answer 14

concentric circles

Question 15

what is similar to the magnetic field of a flat circular coil of wire

Answer 15

the magnetic field of a bar magnet

Question 16

magnetic field of a solenoid

Answer 16

strong and uniform

Question 17

What would you call a magnetic material if it looses its induced magnetism

Answer 17

soft or hard

Question 18

example of a soft and hard magnetic?

Answer 18

iron –> soft
Steel –> hard

Question 19

Why is iron used in transformers

Answer 19

its used because of its property, it can magnetize and demagnetize 50 times a second.

Question 20

how do I increase the strength of the magnetic field around a solenoid

Answer 20

adding a magnetically soft iron core through the middle of the coil

Question 21

Explain the motor effect

Answer 21

when a current carrying wire is put between magnetic poles, the two magnetic fields affect one another , this will result force on the wire. This will also cause the wire to move.

Question 22

will a wire experience a force if it runs along a magnetic field

Answer 22

no

Question 23

What’s a good way of showing the direction of the force

Answer 23

apply current to the set of rails inside of a horseshoe magnet, a bar is then placed on the rail which completes the circuit.

Question 24

magnitude?

Answer 24

magnetic strength

Question 25

what increases with the magnitude of the circuit.

Answer 25

the magnitude of the magnetic field, and the current passing through the conductor.

Question 26

what happens when you reverse the current or the magnetic field.

Answer 26

you reverse the direction of the magnetic force

Question 27

name the thumb, first finger and second finger in Fleming's left-hand rule.

Answer 27

1) thu-M-b --> Motion 2) -F-irst finger --> Field 3) se-C-ond finger --> Current

Question 28

Dynamo effect.

Answer 28

electromagnetic induction to generate electricity using energy from kinetic energy stores is the dynamo effect.

Question 29

real life example of a the dynamo effect

Answer 29

turbine

Question 30

from the abbreviation EM Induction, what is EM Induction

Answer 30

Electromagnetic Induction

Question 31

Name two different occasions where you get EM Induction

Answer 31

1) Coil of wire moves through a magnetic field 2) The magnetic field through an electrical conductor changes

Question 32

Transformer

Answer 32

A transformer is a device that transfers electric energy from one alternating-current circuit to one or more other circuits, either increasing (stepping up) or reducing (stepping down) the voltage.

Question 33

how many coils do transformers have?

Answer 33

✌️, the primary and secondary joined with a soft iron core

Question 34

How do transformers work?

Answer 34

When alternating voltage is applied across the primary coil, the soft iron core magnetizes and demagnetizes quickly,. This induces an alternating voltage in the secondary coil.

Question 35

Induction in physics

Answer 35

The process of generating current in a conductor by placing it in a changing magnetic field is called induction.

Question 36

the ratio between primary and secondary voltages is the same as the ration between...

Answer 36

the number of turns on the primary and secondary coils

Question 37

difference between step up and step down transformers

Answer 37

step up increase the voltage, they have more turns on the secondary coil than the primary coil. step down transformers decrease the voltage, they have more turns on the primary coil than the secondary coil.

Question 38

transformer equation?

Answer 38

Input (primary) voltage / Output (secondary) voltage = Number of turns on Primary / Number of turns on secondary

Question 39

Turns ratio

Answer 39

number of turns on the secondary coil /number of turn on the primary coil

Question 40

power supplied formula?

Answer 40

Power = Voltage X Current

Question 41

voltage, current formula?

Answer 41

primary voltage x primary current = secondary voltage x secondary current aka Vp Ip = Vs Is

Question 42

what are steep up and step down transformers used for

Answer 42

transmitting electricity across the country