Flashcards in Physics Electricity Test Deck (30):

1

## Two basic types of circuit are?

### Series and parallel

2

## What is an electrical current

### The movement of charge between the terminals of an energy source

3

## What must there be for a current to flow in a circuit

###
A full conducting path

A source of electrical energy

4

## What do electrical conductors do and electrical insulators don’t

### Allow electricity to flow through them

5

## What is electric current

### The amount of charge transferred per unit of time (the rate of flow of charge)

6

## What is currents mathematical equation

### I=Q/T

7

## What is potential difference

### The amount of energy given to one coulomb of charge passing through a supply

8

## What is the formula for potential difference

### V=E/Q

9

## What is charge measure with

### An ammeter

10

## What is potential difference measured with

### A voltmeter

11

## What affects resistance

###
Length of resistor

Thickness of resistor

Temperature of resistor

Material of resistor

12

##
What is ohms law

###
V=IR

13

## What is potential difference directly to proportionate too

### If at a constant temperature, potential difference is directly proportionate to the current flowing through it

14

## What is resistance

### The opposition to the flow of charge

15

##
What is resistance measured in

###
Ohms

16

## In a parallel circuit the branch with the highest resistance will have

### The lowest split of current

17

## In a series circuit the component with the highest resistance will have the

### Highest share of voltage

18

## What is power

### A measure of energy transferred each second in a circuit. Measured in watts

19

## What is the formula for power

### P=E/T

20

##
What is the formula of power when

1. Current and potential difference are known

2. When current and resistance are known

3. When potential difference and resistance are known

###
1. P=IV

2. P=IsquaredR

3. P=vsquared/R

21

## What is a direct current (d.c.)

### A current which flows in only one direction

22

## What is an alternating current (a.c.)

### A current which flows in two direction and changes throughout its journey.

23

## What is the main electricity voltage in the UK

### 230 volts

24

## What is a potential divider

### Two components connected in series, usually resistors

25

## What is the equation to find a voltage of one of the resistors

### V=(R1/R1+R2) x supply voltage

26

## What is an LDR

### A light dependant resistor which as the light lèvera increases the resistance decreases

27

## What is a thermistor

### A thermistor is a component which depends on temperature as when the temperature increases the resistance decreases.

28

## What is a protection resistor

### It is a resistor set in place specifically to stop a component from overheating or being overworked

29

## What is a transistor

### It is a circuit used as an electronic switch. It switches on at a certain voltage depending on if it is a mosfet or NPN

30