Second term (1434/1435 H)
3d Period exam
Name:
……………………
Dr. Karam Abdul-Aty
………………………
104 Phys (General Physics 2)
Division: 1114
…..………
Date: 1/7/1435
______________________________________________________________________________________________________
Answer the following questions
Question 1): Correct the mistakes in the following sentences:
(6 degrees)
1) Capacitance is always a negative quantity.
(
)
2) The SI unit of capacitance is the farad (F), which was named in honor of Michael Faraday.
(
)
3) The equivalent capacitance of a series combination of capacitors is the algebraic sum of the individual
capacitances and is greater than any of the individual capacitances.
(
)
4) The SI unit of current is the Coulomb (C).
(
)
5) The mobile charge carriers in a metal are protons.
(
)
6( The electric current and the current density depend on the cross sectional area of the conductor.
(
)
Question 2): Mention the measurement units of the following terms:
Quantity
resistance
electric current
current density
(4 degrees)
electric potential
Unit
Question 3): Give the Scientific terms of the following:
(3 degrees)
1) The rate of flow of charge through some region of space.
2) The number of mobile charge carriers per unit volume.
Question 4: Comlete the missed words:
(6 degrees)
1) The electric current is ……………….. proportional to the cross sectional area of the conductor.
2). The ………………… in the conductor is defined as the current per unit area.
3) When two or more capacitors are connected in parallel, the potential difference across each is ………...
4) The direction of the current is ……………………… the direction of flow of electrons.
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5) The speed of the charge carriers vd is an average speed called the ………………… speed.
6) The electric …………………… is the rate at which charge flows through the surface of a conductor.
The energy transferred from the electrons to the metal atoms during collisions causes an increase in the
vibrational energy of the atoms and a corresponding ……………. in the temperature of the conductor.
* Choose the missed words from the following:
(drift – capacitance – increase - decrease – capacitor – current – current density – charge –
linearly – inversely – the same – opposite)
Question 5: Choose the correct answer:
(6 degrees)
1) Two capacitors are identical. They can be connected in series or in parallel. If you want the smallest
equivalent capacitance for the combination, do you connect them in
(a) in series
(b) in parallel
(c) do the combinations have the same capacitance?
2) 1 A (Ampere) is equivalent to:
a) 1 C/s
b) 1 s/C
c) 1 C×s
d) 1/C×s
b) 1×10-6 A
c) 1×10-9 A
d) 1×10-12 A
b) 1 A/V
c) 1 V×A
d) 1/V×A
c) 1000 
d) 1×106 
3) 1 mA (milli Ampere) equals:
a) 1×10-3 A
4) 1  (ohm) is equivalent to:
a) 1 V/A
5) 1 k (kilo ohm) is equivalent to:
a) 10 
b) 100 
6) The electric current in a conductor is affected by:
a) the charge carrier density (n)
b) the drift velocity (vd)
c) the cross-sectional area (A) of the conductor
d) All the previous are correct
End of the Exam
With best wishes / Dr. Karam Abdel-Aty
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