Electricity & magnetism

Question 1

Charging by induction

Answer 1

Charging an object by the influence of another charged object without touching

Question 2

Electric field [2]
definition and how it is represented

Answer 2

1) Region around a charged particle or object within which a force would be exerted on other charged particles or objects
2) The effects of an electric field can be represented by electric feild lines: Lines cannot cross over each other
Lines always point from positive charges

Question 3

Electric current is… [2]
include formula

Answer 3

1) Rate of flow of charges
2) I =Q/t
t= time
Q= Charge
I = current

Question 4

What happens when electric feild is applied to conductors

Answer 4

Electrons will flow producing electric current

Question 5

Coulomb

Answer 5

1/1.6x10^-19=6.24x10^18

Question 6

What happens when you bring a magnetic material to south or north pole? [2]

Answer 6

1) Attract
2) Attract

Question 7

State 4 magnetic materials

Answer 7

1) IRon
2) Nickel
3) Cobalt
4) Steel

Question 8

Define magnetic feild

Answer 8

A region which a magnetic pole experiences a force

Question 9

Define uniform magnetic feild

Answer 9

A magnetic field that has the same strength and direction at all points

Question 10

define Conventional current [2]

Answer 10

1) Flow of positive charge
2) Opposite of actual flow of electron

Question 11

Conventional current fomurla

Answer 11

I= Q/t
Current = Energy / seconds

Question 12

Define electrical circuit [2]

Answer 12

1( For electrical current to flow there must be a continous path
2) We call this an electrical circuit

Question 13

Series circuit

Answer 13

Current has one single path, current is the same at all points

Question 14

Parallel circuit

Answer 14

Current is split across the parallell branch
has a line in the circuit

Question 15

Ammeter

Answer 15

Measures flow rate so measure electrons

Question 16

Conventional current always flow from positive terminal to negative terminal of the battery T or F

Answer 16

True

Question 17

define emf (Electromotive force)

Answer 17

The battery provides emf to push the electrons along the circuit

Question 18

Energy transfer in a circuit [2]

Answer 18

1) The chemical potneital energy in a battery is transformed into electrical energy
2) Eletrical energy is carried by moving electrons along the wire from points of high to low electrical poential energy

Question 19

Voltage formula

Answer 19

E / Q
E= Difference in electrical p.e per coulomb of charge

Question 20

Electric field define

Answer 20

Where charge experience a force