Circuits

Question 1

Filament bulb

Answer 1

Turns electrical energy into light energy

Question 2

Cell

Answer 2

Provides energy/power

Question 3

Battery

Answer 3

More than one cell

Question 4

Motor

Answer 4

Turn eletrical energy into kinetic energy

Question 5

Open switch/Closed switch

Answer 5

Break the circuit

Question 6

Ametre

Answer 6

Measures current

Question 7

Resistor

Answer 7

Restricts the flow of current

Question 8

Voltmeter

Answer 8

Measures voltage

Question 9

LED

Answer 9

Transfers eletrical energy into light energy

Question 10

LDR

Answer 10

Resistance changes if subject to light

Question 11

Variable resistor

Answer 11

Can change resistance manually

Question 12

Capacitor

Answer 12

Stores charge

Question 13

Thermistor

Answer 13

Resistance changes with temperature

Question 14

Fuse

Answer 14

Melts if too much current flows through

Question 15

Diode

Answer 15

Only allows current to flow one way

Question 16

Kirchoffs 1st law

Answer 16

The total current into a junction Is always equal to the total current out of a junction

Question 17

Current in a series circuit

Answer 17

Always remains the same

Question 18

Current in a parallel circuit

Answer 18

Current after the split tables the same as before the split.

Question 19

Electro motive force (EMF)

Answer 19

(Energy into a circuit)

the energy given to each charge

Question 20

Potential difference

Answer 20

(Energy out of a circuit)

The energy change by each charge

Question 21

Kirchoffs 2nd law

Answer 21

The EMF of a circuit is always equal to the total P.D of each path an electron can take in the circuit

Question 22

Total resistance in a series circuit equation

Answer 22

Rt=r1+r2+r3

In a series circuit, each electron will here to pass all the resistors

Question 23

Total resistance in a parallel circuit equation

Answer 23

1/Rt= 1/r1 + 1/r2 + 1/r3

In a parallel circuit the total resistance is always smaller than the smallest resistance in each loop of the circuit

Question 24

Ohms law

Answer 24

The current flowing through a device is directly proportional to the potential difference across that device at a constant temperature

Question 25

Directly proportional

Answer 25

If one variable decreases or increases by a factor. The other does the same by the same factor.

Question 26

What is an LDR made Of?

Answer 26

semiconductors. Semiconductors are not very good at conducting electricity, unless they're given energy to release the electrons into their atoms. The light provides better energy to these atoms so the brighter it is, the better a conductor the LDR is, and the lower the resistance

Question 27

Inversely proportional

Answer 27

If one increases by a factor the other decreases by the same factor

Question 28

Directly proportional

Answer 28

If one increases the other does by the same factor