Download ANSWER SHEET

Date:
Module Exam:
Physics 070110700
Programme:
Information technology; Science and Technology
Name of
the student:
Index No:
Do not make any other notes on the Answer sheet than answers in the Part I table !
Duration of the exam; 100 min.
ANSWER SHEET
Assessement
Part I
max 30
Part I.
Question
Choice
Score.
Answers:
1
Part II
max 10
2
Part III
max10
3
Part IV
max 10
4
5
Total score
max 60
6
7
8
9
10
correct
incorrect
total
For each statement or question below, write on in the above table the letter of your choice of those given, best completes the statement
or answers the question.
Correct answer = +3 pt,
1. An acoustic wave travels in the water in which its phase speed is 1.49 103 m/s, then the wave enters the air . The phase speed in the air :
A
Decreases and its
frequency does not change
B
Increases and its
frequency does not change
C
Does not change and its
frequency increases
D
Decreases and its frequency increases
2. The total energy in damped harmonic oscillations is given by the expression:
A
B
1
E  kA 2 0 e   t
2
C
1
E  kA0 e   t
2
D
1
E  kA 2 0 e  2  t
2
1
2
E  kA0
2
3. Proton moves in the magnetic field B. When the magnitude of B increases 2 times the proton’s angular velocity:
A
Decreases 2 times
B
Increases 2 times
C
Does not change.
D
Increases 4 times
4. In the polar dielectric material:
A
Molecules do not posses
permanent dipole moments
B
Dipole moments are induced
in the material whenever it is
placed in the external
electrostatic field
5. The phenomenon of electromagnetic induction is responsible for:
A
Generation of the current in a
circuit which moves in the
magentic field.
6. In the Hall Effect :
A
B
kgm 2
A2 s 2
is
Molecules posses permanent
dipole moments even in the
absence of the external fields
Generation of the magnetic field in
a circuit in which current is
changing.
Transverse electric field is generated
in a conductor placed in the magnetic
field.
7. The SI unit of the quantity
C
B
C
Electric current is generated in
the conductor placed in the
magnetic field.
D
There are ions in the material able to
freeely change their position.
Generation of the force on a current
carrying wire placed in the magnetic
field.
C
The transverse magnetic
field is generated in a
current carrying
conductor.
D
D
Generation of the magnetic
field by the current
carrying wire.
The frequency of the
electromagnetic wave chan ges
when reflected from the walls of
huge rooms.
. That unit formal name and symbol is:
A
Volt V
B
Tesla T
C
Henr H
D
Weber Wb
8. Which of the following graphs illustrating one dimensional motion is correct?
A
B
C
X
X
D
X
t
t
t
t
X
9. In the Hall Effect :
A
Transverse electric field is generated
in a conductor placed in the magnetic
field.
B
Electric current is generated in
the conductor placed in the
magnetic field.
C
The transverse magnetic
field is generated in a
current carrying
conductor.
D
The frequency of the
electromagnetic wave chan ges
when reflected from the walls of
huge halls.
10 The sample of ferromagnetic material when placed in the non uniform magnetic field will be:
A
pulled into the field
B
Pushed out from the field
C
Not affected by the field
1
D
Oriented perpendicularly to the
field lines
Part II. (10pts.)
Describe the construction, physical principles of functioning and application of the cyclotron.
Part III (2 pts each )
Give in max 5 sentences the following definition or statement. Supply the formula where applicable (explain
the used symbols):
1. Longitudinal and transverse mechanical wave.
2. Ohm’s law
3. Electrical resistance R
4. Extended Ampere’s law
5. Conservative force.
Part IV (10 pts)
Energy Drink (≈100g) is advertised like this: ‘All the Energy ... Without the Sugar! Only 8 Calories!’
Comment on this using your physics knowledge and intuition.
Exam Policies and Procedures
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Student is obliged to bring with into the testing room and display her/his ID with photo for identification purposes. If there is
a discrepancy in a student's identification, the student may be dismissed from the testing room.
You may not bring cell phones, MP3 players, pagers, or PDA’s into the testing room.
You may not consult textbooks, other students, any electronic device (including wireless e-mail devices or cell phones), or
any other resource during the assignment or during any other unscheduled breaks.
When the personnel find that there is misconduct in connection with an exam, students may be dismissed from the exam
room given the negative result of the whole exam. Students involved in any exam misconduct will be asked to turn in their
exam materials and leave the testing room.
Misconduct includes, but is not limited to, the following:
Obtaining improper access to the exam, or a part of the exam, or information about the exam.
Using any prohibited aids.
Taking food or drink into the testing room.
Leaving the testing room without permission.
Attempting to remove from the testing room any part of the exam or any notes relating to the exam.
Copying from another student's work or a published work.
Attempting to give or receive assistance, or otherwise communicate, in any form, with another person about the exam during
the exam administration.
Attempting to take the exam for someone else.
Creating a disturbance.
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