P4, Electrical Charges And Fields.

  • Created by: cieran_10
  • Created on: 13-10-18 21:24
Why are circuit symbols put together in a diagram?
To show how circuits are connected together.
1 of 26
What is an electric current?
A flow of charge.
2 of 26
What is charge carried by?
Electrons.
3 of 26
What is the line on a current-potential difference graph for a filament bulb? What does it mean?
A curve. That the current is NOT directly proportional to the potential difference.
4 of 26
Complete the sentence: the resistance of the filament lamp increases as the _________________ increases? Now say why?
Current. As the resistance of the filament increases as the temperature does.
5 of 26
What makes no difference to the shape of the curve on a current-potnetial difference graph?
Reversing the p.d.
6 of 26
What two factors will current NOT rely on?
The size of the current or the direction of it.
7 of 26
What does the cureent-potential difference graph look like for a dioide?
It is line along the x-axis, which suddenly rises.
8 of 26
In how many directions can current through a diode go?
One direction.
9 of 26
Why is it that the current will be nearly 0 when the current goes in the opposite direction to how the diode goes?
As the resistance will be very high.
10 of 26
What does an LED do?
It emits light when a current passes through it in the forward direction.
11 of 26
What happens to the resistance of a thermistorwhen the temperature increases?
It will decrese,
12 of 26
What happens to the resistance of an LDR (light-dependent resistor) as the light falling on it gets brighter?
The resistance decreses.
13 of 26
Wh is it that the charge stops flowing everywhere if there is a break in a series circuit?
As the components are connected one after the other.
14 of 26
What is the rule for the current of a series circuit? Why?
That the current through each component is the same. This is due to there being no alternative pathway for the for the charge.
15 of 26
What is the current in a series circuit dependent on? (2.)
The p.d. of the power supply and the resistance.
16 of 26
What is the rule for the p.d. of each component in a series circuit?
It is shared by all of the components.
17 of 26
What is the rule for the total resistance of a series circuit?
That all of the resistance of each component add up to give the total resistance.
18 of 26
Complete the sentence: the bigger the resistance of a component the bigger the share of its ________?
p.d.
19 of 26
In a parallel circuit, how is each component connected? What does thsi mean?
Across the supply. This means that if there is a breakage in one branch of the circuit, then charge can still flow in the other branches/parts of the circuits.
20 of 26
What is the rule for the p.d. of parallel circuits?
That it is the same across all of the components.
21 of 26
What, in the components of parallel circuits, allow different amounts of charge to flow through difference components?
The different junctions.
22 of 26
What does the current flowing through each component of a parallel circuit depend on?
The resistance.
23 of 26
Complete the sentence: the bigger the resistance, the smaller the _______________ through a component?
Current.
24 of 26
What is the rule for the total current of a parallel circuit?
It is the sum of the current of each separate branch.
25 of 26
What is the rule for the total resistance of a parallel circuit?
It is that the total resistance of two or more of the components will be less than the resistance of the component with the least resistance.
26 of 26

Other cards in this set

Card 2

Front

What is an electric current?

Back

A flow of charge.

Card 3

Front

What is charge carried by?

Back

Preview of the front of card 3

Card 4

Front

What is the line on a current-potential difference graph for a filament bulb? What does it mean?

Back

Preview of the front of card 4

Card 5

Front

Complete the sentence: the resistance of the filament lamp increases as the _________________ increases? Now say why?

Back

Preview of the front of card 5
View more cards

Comments

PoppyIsla

Report

Very useful for last minute revision

Similar Physics resources:

See all Physics resources »See all Electricity resources »