Electrisity and Circuts

Question 1

Define current

Answer 1

Current is a measurement of the flow of electrons around a circuit

Question 2

what is the unit of current?

Answer 2

Amps

Question 3

Define potential difference

Answer 3

Potential difference is a force striving the flow of electrons

Question 4

what is the unit for potential difference?

Answer 4

Volts

Question 5

define resistance

Answer 5

Resistance is everything that resist or opposes the flow of electrons

Question 6

what is the unit for resistance?

Answer 6

ohms

Question 7

Which way does a circuit current flow?

Answer 7

A circuit current flows from the positive to the negative terminal in the cell or battery

Question 8

what is the equation to determine potential difference?

Answer 8

Potential difference
=
current x resistance

Question 9

What is the relationship between potential difference current and resistance?

Answer 9

If the resistance is constant, the voltage and current increase proportionally

Question 10

is a potential difference and current graph, linear or nonlinear, and why

Answer 10

It is linear because the resistance and potential difference increase proportionally when the resistance is constant

Question 11

is a filament lamp, graph, linear, or non-linear and why?

Answer 11

A filament lamp is non-linear as when the current blows, the filament in the bulb heats up until light is produced. Therefore, the amount of current needed to heat up, the lamp will decrease as the lamp becomes hotter

Question 12

How does a filament lamp light up?

Answer 12

The current flows through the film and bulb as the current flows through the filament in the lamp will heat up until light is produced

Question 13

what is a diode?

Answer 13

A diode is a device, which only allows a current to flow in one direction

Question 14

How does a diode work?

Answer 14

A diode allows current to flow in only one direction. They do this by having a high resistance in the opposing direction, therefore restricting any current from flowing that way.

Question 15

what happens to a series circuit if a component is removed?

Answer 15

In a series circuit, if a component is removed, the circuit is broken

Question 16

in a series circuit state with a potential difference, current and resistance are shared or constant across each component

Answer 16

Circuit, the potential difference is shared across a component meaning if there is 12 V and two components then the sum of two components must equal 12. This is the same with the resistance. However the current always stays the same across a series circuit, meaning that all components have an equal current

Question 17

Where can you place an ammeter in a series circuit?

Answer 17

Since the current is the same across each component in a circuit, it does not matter where the ammeter is placed

Question 18

where must you placed a voltmeter in a series circuit?

Answer 18

A voltmeter must be connected in parallel to the component. It is measuring. This does not however, make a series circuit, a parallel circuit.

Question 19

What is ohms law?

Answer 19

V = IR

Question 20

what happens if a component is broken or removed from a parallel circuit

Answer 20

If a component is moved from a parallel circuit, the circuit still works

Question 21

in a parallel circuit is the potential difference and current shared, or equal between different components

Answer 21

In a parallel circuit, the potential difference is equal between each component. If 12 V is pushed around a circuit from a battery. Every component will have a potential difference of 12 V. However, the current is shared across a circuit. If 14 A is pushed across a circuit, then each components current will be the sum of 14.

Question 22

in a parallel circuit, what is the relation between more components and total resistance?

Answer 22

In a parallel circuit, the more components you add the lower, the total resistance will be