Electricty

Question 1

Independent variable on the resistance of a wire

Answer 1

Length of the wire

Question 2

Dependant variable of the resistance in a wire

Answer 2

Resistance

Question 3

Conclusion of the resistance in a wire

Answer 3

Length of the wire increases so does the resistance

Question 4

Independent variable of a parallel circuit with resistors

Answer 4

Variable circuit type

Question 5

Dependant variable of resistance

Answer 5

Resistance

Question 6

Control variable number of resistors and type of power source

Answer 6

Number of resistors type of power

Question 7

Conclusion of parallel circuits with resistors

Answer 7

Adding resistors in series increases the total resistance of the circuit. In parallel the more resistors you add smaller the resistance

Question 8

Investing relationships in circuit independent variable

Answer 8

Potential difference

Question 9

Dependant variable of relationships in circuits

Answer 9

Current

Question 10

Control variable of relationships in circuits

Answer 10

Number of components

Question 11

What is the charge definition

Answer 11

Electric current is the flow of electric charge

Question 12

Ohmic conducter meaning

Answer 12

Current directly proportional to the potential difference - it’s a straight line

Question 13

Filliament lamp meaning

Answer 13

Current increases so does the temperature. Makes it harder for current to flow graph becomes less steep

Question 14

Diode meaning

Answer 14

Only flows in one direction. The resistance is very high in the other direction which means no current can flow

Question 15

Ldr meaning

Answer 15

Is dependant on light intensity in bright light the resistance fall and at night the resistance is higher

Question 16

Thermistor meaning

Answer 16

Temperature is dependent resistor if it’s hot then the resistance is less . If cold the resistance increases

Question 17

Series circuit if once component is broke what happens

Answer 17

All the components will stop working

Question 18

What’s is ac and describe

Answer 18

Alternating current . Constantly changing direction uk mains supply 230v and frequency of 50 hertz

Question 19

Dc means and describe

Answer 19

Direct current . Supplied by Batteries and only flow in one direction

Question 20

Cables means

Answer 20

They only have 3 wires
Earth . Live , neutral

Question 21

Liver wire means

Answer 21

Provide potential difference from the mains

Question 22

Neutral wire means

Answer 22

Complete the circuit

Question 23

Earth wire Means

Answer 23

Protection . Stops the apliance from becoming live . Carries a current if there is a fault

Question 24

Describe national grid

Answer 24

It goes power station to set up transformer to the transformer cables then to the step down transformer and then to the consumers

Question 25

Set up transform meaning

Answer 25

Increase the voltage as the electricity flows through the cables

Question 26

Step down transformer meaning

Answer 26

Decrease the pottentinal difference to make it safe