Unit 3- Ciruits

Question 1

What is a parallel circuit

Answer 1

It is a circuit where the current splits, the voltage stays the same and components can turn off and on sepaterly

Question 2

What is the symbol for a thermistor

Answer 2

It is a box with a line through it

Question 3

What is a thermistor

Answer 3

Thermistor have a high resistance when they are cold. When they are heated up they have a low resistance, making it easier for current to flow. The increase in temperature increases the number off free electrons available

Question 4

What is the symbol for a light dependent resistor

Answer 4

It is a box with a circle round it

Question 5

What is a light dependent resistor

Answer 5

Light dependent resistors have a high resistance in the dark. When light shines on the LDR it has a low resistance. This makes it easier for the current to flow

Question 6

What is the symbol for Diode

Answer 6

It is a circle with a triangle in it with a line at the tip of the triangle

Question 7

What is a diode

Answer 7

It is a resistor that only let current flow in one direction- it has a very high resistance in the other direction

Question 8

What is the symbol for a filament bulb

Answer 8

Circle with an Cross in it

Question 9

What is a filament bulb

Answer 9

Resistance increases as voltage increase

Electrons gain energy vibrate more and current slows down

Question 10

Rearrange Q= E/V

Answer 10

V = E/Q 
E = Q ✖️ V

Question 11

What does V stand for

Answer 11

Voltage (volts)

Question 12

What does E stand for

Answer 12

Energy (joules)

Question 13

What does Q stand for

Answer 13

Charge (coulombs)

Question 14

What charge is carried if 600J is delivered by a voltage of 12V

Answer 14

V= E/Q
Q= E/V
Q= 600J/ 12V
= 50 coulombs

Question 15

What is a series circuit

Answer 15

It is a circuit where the current stays the same, the voltage is shared between the components and less wiring heats quicker

Question 16

Rearrange Q = I ✖️ T

Answer 16

I = Q/T 
T = Q/I

Question 17

What does T stand for

Answer 17

Time (second)

Question 18

What does Q stand for

Answer 18

Charge (coulombs)

Question 19

What does I stand for

Answer 19

Current (amps)

Question 20

How much current flows in 60C is delivered for 2 minutes

Answer 20

Q= I ✖️ T
I = Q/T
I = 60C/120S
= 0.5 A

Question 21

In cold wire …… Vibration of atoms (resistance)

Answer 21

Small

Question 22

In cold wire electrons pass through …… (Current)

Answer 22

Easily

Question 23

In hot wire …… Vibration of atoms (resistance)

Answer 23

Large

Question 24

In hot wire electrons pass through with …… (Current)

Answer 24

Difficulty

Question 25

What does OHMIC give and an example

Answer 25

A consistent resistance and wire

Question 26

What does non-OHMIC give and an example

Answer 26

A resistance that changes with voltage and a bulb

Question 27

In a non- OHMIC graph when it is shallow it has a .......

Answer 27

Low resistance

Question 28

In a non- OHMIC graph when it is steep it has a .......

Answer 28

High resistance

Question 29

Rearrange V = I ✖️ R

Answer 29

``` I = V/R R = V/I ```

Question 30

What does V stand for

Answer 30

Voltage (volts)

Question 31

What does I stand for

Answer 31

Current (amps)

Question 32

What does R stand for

Answer 32

Resistance (OHMS)

Question 33

Current=

Answer 33

How many electrons pass through , Rate of flow of charge around a circuit

Question 34

Voltage=

Answer 34

Amount of energy electrons are carrying | Driving force that pushes the current round

Question 35

Potential difference is equal to...

Answer 35

Voltage

Question 36

What is series curcuit

Answer 36

It is a circuit where current stays the same, | The voltage is shared between the components and less wiring heats quicker

Question 37

Name the 3 equations

Answer 37

``` V = I ✖️ R Q = I ✖️ T E = V ✖️ Q ```