Brainscape's Knowledge GenomeTM

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


See full index

Physics > Mock Test > Flashcards

Mock Test Flashcards

1
Q

What is Newton’s first law of motion?

A

A body will remain at rest or move with uniform motion(equilibrium) unless acted on by a resultant force

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

What is Newton’s second law?

A

F=MA

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

What is Newton’s third law?

A

If object A exerts a force on object B, object B will exert and equal force on object A in the opposite direction

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

What is the definition of force?

A

Force is the rate of change of momentum

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

What is the principle of moments?

A

For a body in equilibrium, the total clockwise moment is equal to the total anti-clockwise moment

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

What factors affect the extension of a cylindrical object under a tensile force?

A

Force (Force increases, change in length increases)
Material(YM increases, length decreases)
Cross sectional area(A increases, change in length decreases)
Natural Length

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

What is Hookes law?

A

The extension is proportional to the force applied, up to the limit of proportionality

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

What is Hookes law formula?

A

F=KL

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

What is the formula for Elastic potential energy?

A

1/2 FL or 1/2 KL^2

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

Formula for spring constant in series

A

1/K total = 1/K1 + 1/K2

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

Formula for spring constant in parallel

A

Ktotal =K1 + K2

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

What is plastic deformation?

A

When it doesn’t return to its original length

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

What is the equation for stress?

A

Force/Area = Pascals

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

What is the equation for strain?

A

Extension/original length

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

What is the equation of the young’s modulus?

A

stress/strain= pascals

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

Formula for number of electrons?

A

n=Q/e

17
Q

What is the shape of the VI graph of a carbon resistor/ ohmic conductor?

A

Y=X straight line thru origin

18
Q

Why does resistance increase when temperature increases?

A

There is an increase of lattice vibration so the electrons find it harder to flow through the metal. Therefore the resistance increases.

19
Q

What is important about a superconductor?

A

An electrical current can flow through it producing no heat, therefore, no power loss

20
Q

Where can a super conductor be used?

A

MRI Scanners

Hadron Collider

21
Q

What remains the same in a series circuit?

A

All components have the same current flowing through them

22
Q

What remains the same in a parallel circuit?

A

All components have the same potential difference

23
Q

What is the equation for R total and V total in a series circuit?

A

V total = V1 + V2

R total = V1+ V2

24
Q

What is the potential divider equation?

A

V1/Vt = R1/Rt

25
Q

What is the equation for I total and V total in a parallel circuit?

A 
It = I1 +I2
1/Rt = 1/R1 + 1/R2
26
Q

Small Internal resistance causes…?

A

Large current from supply
Lost volts will be large
PD across load will be a lot less than the emf

27
Q

What is Kirchoff’s first law?

A

The total current flowing into a point is equal to the current flowing out of the point

28
Q

What is Kirchoff’s second law?

A

The total emf provided by the supply must equal the pd across the components around a close loop.

29
Q

Low to high RI means?

A

towards normal

30
Q

High to low refractive index means?

A

Away from normal

31
Q

What conditions are required for total internal refraction?

A
  • Refractive index of initial material must be greater than index of the material on the other side
  • Angle of incidence must be greater than the critical angle
32
Q

What are 4 advantages of using fibre optic cables?

A
  • faster transmission of data
  • cheaper to produce
  • More energy efficient
  • No interference from mains
33
Q

What are the problems with optical fibres?

A

Absorption if the fibre isn’t perfectly transparent, signal gets weaker
Dispersion causing pulse broadening so signals are disrupted

34
Q

What is monochromatic light?

A

Light with a single frequency and a single wavelength

35
Q

What are the properties of a coherent source?

A

Same frequency
Same speed
have a constant phase difference
(constant phase difference)

36
Q

Describe why dark fringes can be seen in the Youngs double slit experiment?

A

2 coherent sources are creating an interference pattern.
Dark fringes are observed when there is destructive interference.
At this point, two waves have a phase difference of 180 and a path difference of a half a wavelength. This can be explained by the principle of superposition.

37
Q

Requirements for a stationary wave?

A

Same speed
Opposite directions
same frequency

38
Q

What is particle annihilation?

A

Particles-Antiparticle pair annihilate to produce two high energy photons

39
Q

What is pair production?

A

High energy photons produces particle-antiparticle pair

Physics (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions