Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BMAT > Physics > Flashcards

Physics Flashcards

1
Q

What is charge measured in?

A

Coulombs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is current measured in?

A

Amps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is voltage or potential difference measured in?

A

Volts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is energy measured in?

A

Joules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is resistance measured in?

A

OHMS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is power measured in?

A

Watts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is charge?

A

The flow of electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is current?

A

The speed of flow of electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is voltage?

A

The energy required to move charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How can two insulators become charged?

A

Friction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is induction?

A

When an unmagnetised object is magnetised when close to a magnetised object
EG: MAGNETIC OR ELECTRICAL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why does friction cause objects to become electrically charged?

A

Electrons will be transferred from one object to another result in positive and negatively charged objects

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is sparking ?

A

parking is what occurs when the air between two objects becomes ionised by a large voltage and therefore starts conducting. Two charged objects, that have air between them, can discharge by a spark between them. This will happen either when the charge becomes large enough or when the distance between the objects becomes small enough.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is used to power a dc?

A

cells or batteries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is used to power an ac?

A

Generators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is frequency of the mains supply in the UK?

A

50HZ

50 waves to and fro per sec

17
Q

Examples of good conductors?

A
  • all metals, particularly copper, gold and silver
  • carbon (in the form of graphite)
  • ionic solutions.
18
Q

Examples of good insulators?

A
  • most non-metals, particularly plastics, rubber, dry wood, air, vacuum.
19
Q

How to calculate current?

A

Current = charge/time

20
Q

What is a milliamp or microamp?

A 
milliamp= 1x10-3
microamp= 1x10-6
21
Q

Where does current flow in the circuit?

A

from the positive to the negative

22
Q

How is resistance connected to the voltmeter or the ammeter?

A

Voltmeter has high resistance to prevent current from travelling through it
Ammeter has very low resistance to prevent the reduction of current used to measure

23
Q

How to calculate resistance?

A

Resistance= voltage/current

24
Q

What is kilo-ohm or mega ohm?

A

Kiloohm = 1x103

mega ohm= 1x106

25
Q

Describe the v I graph of a fixed resistor?

A

Straight-line with a fixed resistance going through the origin

26
Q

Describe the v I graph of a filament lamp?

A

curve as temperature increases the voltage increases

27
Q

What is a thermistor?

A

AS temp increases resistance decreases

28
Q

What is a LDR?

A

LIGHT DEPENDENT RESISTOR

29
Q

Factors of a series circuit?

A

Current is constant

voltage is shared in a series circuit

30
Q

Factors of a parallel circuit?

A

Current split proportionally to resistanc

Voltage is constant across each branch

31
Q

How to calculate voltage from energy?

A

Voltage= energy/charge

32
Q

How to calculate power?

A 
Power= energy/time
Power= voltage x current
Power= current2 x resistance

BMAT (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions