P3 TEMP - Electric Circuits

Question 1

All matter contains ______ - atoms contain ______ protons and ________ electrons

Answer 1

charges, positive, negative

Question 2

Neutral matter contains an _____ amount of ______ and _______ - so their charges _____ out (zero net charge)

Answer 2

equal, protons, electrons, cancel

Question 3

Static electricity is the ____ __ of ______ in objects

Answer 3

build up, charge

Question 4

Static electricity can be made

1) When ________ materials ___ together, electrons will be ______ off one and ________ to another one

2) This will leave the materials ________ charged, one having a ______ charge and another having an _____
_________ charge.

3) If enough charge ______ __, it can suddenly ______, causing ______ or _______

Answer 4

insulating, rub, scraped, transferred

electrically, positive, equal negative

builds up, move, sparks, shocks

Question 5

Which way electrons are transferred depends on the two _________ involved

Polythene rod - Electrons move from _______ to ____

Acetate rod - Electrons moves from ____ to _______

Answer 5

materials

duster, rod

rod, duster

Question 6

Electrically charged objects _____ a force on each other

Opposite electric charges _______

Negative electric charges _______

It’s a ___ _______ force

Called electrostatic attraction if they _______

Called electrostatic repulsion if they _______

Answer 6

exert

attract

repel

non contact

attract

repel

Question 7

An electrical _____ is the _____ surrounding any _______ charge, where its ______ can be felt.

Answer 7

field, space, electric, effects

Question 8

A force is _____ on both electrical _______ when their electrical _____ are _________

Strength of the electrical ____ depends on the ____ of the _______ and ______ from the ______

Answer 8

exerted, charges, fields, interacting

field, size, charge, distance, charge

Question 9

Electrical fields can be used to explain ______

If two ______ are ______ together to ______ electrons from one to another, and then placed _____ each other, a _____ will be _______

If the _____ acting on the objects due to their electric ____ are ___ enough, then the electrons will _____ from the _______ material to the ______ material. This is a _____.

Answer 9

sparks

objects, rubbed, transfer, near, force, exerted

forces, fields, big, jump, negative, positive, spark

Question 10

Current is the ____ of flow of electrical ______.

Current is measured in _______ (_)

Answer 10

rate, charge

Amps (A)

Question 11

______ will only flow if there the circuit is _____ and forms a _______ loop and if there is a _______ of _______ _______ (e.g. battery)

Answer 11

Charge, closed, complete, source, potential difference

Question 12

In a single closed loop, current has the _____ value ________ on the circuit

Answer 12

same, anywhere

Question 13

Potential difference is the _______ ______ that _____ the ______ around.

P.D. is measured in _______ (_)

Answer 13

driving force, pushes, charge

Volts, (V)

Question 14

Resistance is anything that ______ the flow of ______

It is measured in _______ (__)

Answer 14

resists, charge

Ohms (Ω)

Question 15

If P.D. increases and resistance remains the same, current _______.

If P.D. remains the same and resistance increases, current _______.

Answer 15

increases

decreases

Question 16

Charges are not _____ __, but transfer _____ to components as they do ______.

Answer 16

used up, energy, work

Question 17

Formula for finding total charge

_________ ( _________ ) () = _________ (A) x time ()

Q = IT

Answer 17

Charge, Coloumbs, (C), Current, (s)