PHYS 102 Previous Exam Problems
CHAPTER
16
1.
Waves
Transverse waves on a string
Power
Interference of waves
Standing waves
Resonance on a string
The
displacement
of
a
string
carrying
a
traveling
sinusoidal
wave
is
given
by:
y (x , t ) = y m sin(kx t + )
Prepared by Dr. A. Mekki
1.
There are two types of electric charges in nature;
Positive charge (proton) and negative charge (electron).
An object is positively charged if it has lost electrons.
An object is negatively charged if it has gained electrons.
PHYS102 Previous Exam Problems
CHAPTER
17
Sound Waves
Sound waves
Interference of sound waves
Intensity & level
Resonance in tubes
Doppler effect
If the speed of sound in air is not given in the problem, take it as 343 m/s.
1. A pipe has two consecutive
PHYS102 Previous Exam Problems
CHAPTER
20
Entropy & the Second
Law of Thermodynamics
Entropy gases
Entropy solids & liquids
Heat engines
Refrigerators
Second law of thermodynamics
1. The efficiency of a car engine is 20% when the engine does 1.2 kJ
PHYS102 Previous Exam Problems
CHAPTER
19
The Kinetic Theory
of Gases
Ideal gas
RMS speed
Internal energy
Isothermal process
Isobaric process
Isochoric process
Adiabatic process
General process
1. Figure 1 shows a cycle undergone by 1.0 mol of a monatomi
PHYS102 Previous Exam Problems
CHAPTER Temperature, Heat & The
18
First Law of Thermodynamics
Equilibrium & temperature scales
Thermal expansion
Exchange of heat
First law of thermodynamics
Heat conduction
1. The volume of 1.00 kg water is 958.38 mm3 at
Aljalal-Phys.102-142-Ch30-page 1
Chapter 30
Induction and Inductance
Objective
30-1 Faraday's Law and Lenz's Law
30-2 Induction and Energy Transfers
Aljalal-Phys.102-142-Ch30-page 2
30-1 Faraday's Law and Lenz's Law
Electric motor and electric generator
E
Aljalal-Phys102-142-Ch16-page 1
Chapter 16
Waves - I
16-1 Transverse Waves
16-2 Wave Speed on a Stretched String
16-3 Energy and Power of a Traveling String Wave
16-5 Interference of Waves
16-7 Standing Waves and Resonance
Objective
Aljalal-Phys102-142-Ch
Aljalal-Phys.102-142-Ch28-page 1
Chapter 28
Magnetic Fields
28-1 Magnetic Fields and the Definition of B
28-2 Crossed Fields: Discovery of the Electron
28-4 A Circulating Charged Particle
28-6 Magnetic Force on a Current-Carrying Wire
28-7 Torque on a Cur
Aljalal-Phys.102-142-Ch24-page 1
Chapter 24
Electric Potential
Objective
24-1 Electric Potential
24-2 Equipotential Surfaces and the Electric Field
24-3 Potential Due to a Charged Particle
24-4 Potential Due to an Electric Dipole
24-6 Calculating the Fiel
Aljalal-Phys.102-142-Ch25-page 1
Chapter 25
Capacitance
25-1 Capacitance
25-2 Calculating the Capacitance
25-3 Capacitors in Parallel and in Series
25-4 Energy Stored in an Electric Field
25-5 Capacitor with a Dielectric
Objective
25-1 Capacitance
Some ap
Prepared by Dr. A. Mekki
1. Sound waves are longitudinal; that is the particles of the medium move
parallel to the direction of motion of the wave.
The velocity of sound in different media is given by;
v
v
solid
Fluid
=
Y
where Y is the Young modulus ( N
Prepared by Dr. A. Mekki
1.
Wave is the motion of a disturbance. In order to produce a wave, we
need a source of disturbance, a medium and the medium should be
continuous.
2.
There are two (2) types of waves:
Transverse Waves:
The particles of the disturb
Prepared by Dr. A Mekki
1.
The magnetic force that acts on a charged particle of charge q moving with
a velocity v in an external magnetic field B is given by;
r
r r
F B = q( v B )
where FB is in Newton (N), q is in coulomb(C), v is in m/s and B is in
Tes
Prepared by Dr. A. Mekki
1.
One main source of magnetic fields is a current carrying wire.
2.
The magnetic field due to a straight wire of finite length and carrying a
current I is given by;
Bp =
o I
4 R
P
(cos 1 cos 2 )
R
1
2
I
where R is perpendicular d
Prepared by Dr. A. Mekki
1. A battery is also called an electromotive force (emf).
An ideal emf has no internal resistance r.
+
_
A real emf has an internal resistance r.
+
_
r
2. Analyzing circuits:
R
I
*
A
B
VB VA = I R < 0
As you move in the same dir
Prepared by Dr. A. Mekki
1.
The electric current I is defined as:
I=
dq
dt
The current is the rate of flow of electric charge. It has units of
Coulomb/second or Ampere (A).
It is also given by:
I = n e vd A
where n is number of charge carriers, e is the m
Summary of chapter 2
Prepared by Dr. A. Mekki
1. Capacitor and Capacitance
A capacitor is a device that stores charge and electrical potential energy.
The capacitance of a capacitor is defined as C =
q
V
where q is the charge on each plate of the capaci
Prepared by Dr. A. Mekki
1. An electric force F acts on a point charge q in an external electric field E as
shown below.
E
q
f
This force is conservative
F
i
W = U
2. We define the electric potential V at a point in the electric field as the
potential en
Prepared by Dr. A. Mekki
r
1. The electric flux through a planar surface in a uniform electric field E is;
= E A cos
where the angle is between the vector E and the vector A. The vector A is
always perpendicular (normal) to the surface in consideration.
Prepared by Dr. A. Mekki
r
1. The electric field E at any point id defined in terms of the electrostatic force
on a positive test charge q0:
r
r F
E=
qo
F
qo
q
2. The electric field due to a point charge q at a distance r from the charge is
given by:
E(p)
Prepared by Dr. A. Mekki
1. Entropy, S, is a measure of the disorder.
2. Most of the processes in our life are irreversible, that is they happen in oneway.
The change of entropy for an irreversible process in a closed system is
always positive.
3. Entropy
Thermodynamics (PHYS 102)
Dr. Ali M. Al-Shukri
Ideal Gas Law
:
Isothermal processes :
Isobaric processes
:
Isovolumetric processes :
Adiabatic process
:
Internal Energy
Work
Heat
:
:
:
1st Law of T.D.
Entropy
:
:
PV
T
P
V
Q
=
=
=
=
=
nRT = NkT
constant (
Prepared by Dr. A. Mekki
1. The number of moles, n, in a substance is
N
m
=
NA M
where N is the number of molecules, m is the mass of the substance, M is the
molar mass of the substance and NA is Avogadros number.
n=
NA = 6.02 x 10-23 molecules/mole (is t
Prepared by Dr. A. Mekki
1.
If two bodies are in thermal equilibrium with each other they
must have the same temperature.
2.
The Zeroth-law of thermodynamics states that if two bodies A and
B are separately in thermal equilibrium with a third body, C, the
Aljalal-Phys.102-142-Ch26-page 1
Chapter 26
Current and Resistance
26-1 Electric Currents
26-2 Current Density
26-3 Resistance and Resistivity
26-4 Ohm's Law
26-5 Power in Electric Circuits
Objective
Aljalal-Phys.102-142-Ch26-page 2
26-1 Electric Currents