100 or so Paper 2 IGCSE Physics facts Flashcards Preview

IGCSE Physics (PAS 2017) > 100 or so Paper 2 IGCSE Physics facts > Flashcards

Flashcards in 100 or so Paper 2 IGCSE Physics facts Deck (81)
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1

What is the difference between scalar and vector quantities?

Vectors have a direction as well as a magnitude (size)

2

Magnets can attract?

Magnetic materials (and other magnets too)

3

What are the disadvantages of hydroelectric power?

Floods a large area,

disrupts people and animals

4

Name some vector quantities

Velocity,

displacement,

acceleration,

force,

momentum,

moment,

current

5

What is the relationship between input and output power of a transformer?

Pprimary = Psecondary

IpVp = IsVs

6

What experiment can be done to demonstrate charging by friction?

Rub a plastic rod with a cloth, show charge on coulombmeter or repel/attract other charged things.

Rub a balloon on jumper / hair stick to wall.

7

Energy transferred per unit charge is known as?

Voltage

8

Magnets can attract or repel?

Other magnets

9

If the kelvin temperature of a gas doubles, what happens to the pressure it exerts?

Pressure doubles too

10

What are some advantages of digital signals?

Can carry more information

Easier to clean the signal (remove noise)

11

How can electrostatic charge cause a fire at a petrol station.

Charge builds up on car while driving

a spark when person touches car

+ fuel vapour = explosion

12

What are the advantages of hydroelectric power?

Renewable,

no air pollution,

low running costs, no fuel costs

13

Name some scalar quantities

Speed,

mass,

volume,

time,

energy,

charge,

pressure,

power

14

What is the difference between analogue and digital signals

Analogue signals can have any value.

Digital signals can ONLY be on or off

15

What are the advantages of geothermal power?

Renewable,

no air pollution,

low running costs, no fuel costs

16

Why is iron used as the core for a transformer?

Soft magnetic material; gains and loses magnetism easily.

17

What is conservation of momentum?

Momentum before a collision (or explosion) is equal to the momentum after.

Assuming no external forces act.

18

Describe the arrangement and motion of particles in a gas

No pattern;

Able to move freely/fast;

Larger space between particles;

19

What has the following magnetic field shape? 

Field around a current carrying wire

20

What are the advantages of solar cells?

Renewable,

no air pollution,

low running costs, no fuel costs

21

What are the advantages of wind power?

Renewable,

no air pollution,

low running costs, no fuel costs

22

Which support provides more force? Why? 

Moments about the person are equal. 

A closer to person, so needs bigger force to provide same moment as B.

23

What is happening to this wave? 

Diffraction; wave is spreading out

24

Describe the arrangement and motion of particles in a liquid

Irregular pattern;

Able to move over/past other particles;

Little space between particles;

25

What are the advantages of nuclear power?

Reliable (not weather dependent),

already established,

high power output

26

How does bending you knees help prevent injury?

Increases collision time,

lower deceleration (a=V/t),

lower force (F=ma)

27

What has the following magnetic field shape? 

Field around a flat coil

(looks like an owl)

28

Why is the iron core in a transformer laminated?

Prevents eddy currents;

stops heating;

keeps efficiency high.

29

What are the general advantages of renewable sources of power?

Renewable,

no air pollution,

low running costs, no fuel costs

30

What change of state happens during condensing?

gas to liquid