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A-level Physics > Paper 1 > Flashcards

Flashcards in Paper 1 Deck (35):
1

What are the scalar quantities?

Mass, Time, Energy, Work, Length, Speed

2

What are the vector quantities?

Displacement, Force, Acceleration, Velocity, Momentum

3

What are the base units?

Kg, m, s, A, K

4

What is the centre of mass?

Where the weight of an object is considered to act

5

What is energy?

The ability to do work

6

What is work done?

The amount of energy transferred from one form to another

7

What is power?

The rate of doing work?

8

In an inelastic collision...

Kinetic energy isn't conserved but total energy is

9

Newtons 3rd law pairs...

-Act on different bodies
-Are equal magnitude
-Same type of force

10

What is current?

Rate of flow of charge

11

What is potential difference?

Work done per unit charge

12

What is resistance?

Resistance to the flow of charge

13

What is resistivity?

It is the resistance of a 1m length, 1m^2 cross sectional area, of a material

14

What is the E.M.F?

The energy per unit charge transferred into electric energy

15

What is internal resistance?

The resistance inside the cell

16

What is ohm's law?

When current is proportional to P.d

17

What is Kirchoff's 1st law?

The current entering a junction = the current leaving the junction

18

What is Kirchoff's 2nd law?

The total EMF around a closed loop = the sum of the P.d's across each component

19

When will an object move with simple harmonic motion?

When the restoring force acting on it is directly proportional to its displacement from its equilibrium

20

What is an induced EMF directly proportional too?

The rate of change of flux linkage

21

What direction is the induced EMF in?

A direction which opposes the change that caused it

22

High energies are required to overcome...

Repulsive forces

23

Why do anti-particles only survive for a fraction of a second?

They meet anti-matter an annihilate

24

What is thermionic emission?

Where a metal is heated given free electrons enough energy to escape

25

What is a baryon made of?

3 quarks or 3 anti-quarks

26

What are mesons made of?

A quark and an anti-quark

27

What are leptons?

Fundermental particles

28

What are the different leptons?

Electron, Muon, Tau

29

What is the charge on the leptons?

-1 (relative to an electron)

30

What is the charge on a neutrino?

0

31

What quantities are conserved?

-Baryon number
-Lepton number
-Mass-energy
-Momentum
-Charge
-Strangeness (number anti-strange quarks)

32

Cloud chambers...

-Contains a chamber of super cooled vapour
-Ions left by charged particles make the vapour condense and leave trails

33

Bubble chambers...

-Hydrogen kept liquid form above normal boiling point at high pressure
-Pressure suddenly reduced when charged particle passes through and bubbles of gas form and show trail

34

Charged particles in a perpendicular magnetic field...

Will follow a curved path

35

What happens when a particle travels close to the speed of light?

Its mass increases