# Electric Charges and Fields Flashcards

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1
Q

how is charge represented

A

q (columbs)

2
Q

p and e charge

A

1.6 x 10^-19 and -1.6 x 10^-19

3
Q

what are charged objects

A

when an object has an unequal number of protons and electrons it is charged

this happens when two objects are rubbed together and electrons move from one object to another

if charges are not moving, this inequality is called electrostatic charge or static electricity

4
Q

how are electric fields represented

A

with arrows showing the direction of the force which a positive charge would experience at that point in the field

the stronger the field, the closer the lines
field lines never cross

5
Q

what is electrical potential differnece (voltage)

A

when charges are separated, there is a potential energy difference between them, This is known as electrical potential differnce (voltrage)

6
Q

what happens when a negatively charged particle is pulled away from a positvely charged particle

A

it requires work which is stored as potential energy, if you let go, the potential energy would be converted to kinetic energy and the particle would fly back towards the positive charge.

7
Q

Electrical potential difference formula

A

amount of electrical potential energy to each columb of charge

V = E/q

voltage = volts (V)
E = electrical potential energy (J)
q is charge (C)

8
Q

potential difference in a battery

A

inside a battery, electrons are chemically removed from atoms and accumulate at the negative terminal

these electrons are attracted to the positve ions at the positive terminal of the battery so there is a potential difference between 2 ends

9
Q

how does a battery die out

A

a conductor is used to connect the two ends, electrons from negative terminal and the free electrons in the conductor travel towards the positve terminal of the battery

overtime the chemical reaction at the negative terminal slows down and stops and battery becomes flat

10
Q

electric current formula

A

I = q/t
I is current in amp
q is charge in C
t is time in seconds

11
Q

what is conventional current

A

conventional current flows from positive terminal of the battery to the negative terminal

drawn in circuits

12
Q

what is electron flow or electric current

A

electric current is teh flow of electrons and electron current flows from the negative terminal of teh battery to the positve terminal.