Title: نهائي / إختيار من متعدد / متوسط
Course: مختبر فيزياء عامه 2 الشعبة 10 عملي

Q: In the experiment of equipotential surface and electric field lines, the Figure shows two lines of charge. when moving from positive to negative the equipotential:

[Image]
- Increasing
- Decreasing
- Not change
- Equal zero
A: Decreasing

Q: The waveform display on the oscilloscope is shown in the figure: the scales of oscilloscope are  (4 ms/div in horizontal which represent the time  and 4 V/div in vertical which represents the Volt). Referring to the figure The voltage  Peak  to Peak V_p-p is:

[Image]
- 8 volt
- 8 division
- 16 volt
- 4 volt
A: 8 volt

Q: In the experiment of the equipotential surface and electric field lines, the Figure shows two lines of charge. when moving from negative to  positive   the equipotential:

[Image]
- Increasing
- Decreasing
- Not change
- Equal zero
A: Increasing

Q: The waveform display on the oscilloscope is shown in the figure: the scales of oscilloscope are  (4 ms/div in horizontal which represent the time  and 4 V/div in vertical which represents the Volt). Referring to the figure The Frequency of the wave is:

[Image]
- 125 Hz
- 50 Hz
- 250 Hz
- 60 Hz
A: 250 Hz

Q: Which of the following statement is correct?
- An electric field is a scalar quantity
- Electric field lines are at 45 degrees to the equipotential surfaces
- Electric field lines are perpendicular to equipotential surfaces
- Field lines due to a point charge are circular
A: Electric field lines are perpendicular to equipotential surfaces

Q: The waveform display on the oscilloscope is shown in the figure: the scales of oscilloscope are  (4 ms/div in horizontal which represent the time  and 4 V/div in vertical which represents the Volt). Referring to the figure. The period of the wave is:

[Image]
- 4ms
- 8ms
- 4 division
- 2 division
A: 8ms

Q: The waveform display on the oscilloscope as shown in  figure: the scales of oscilloscope are  (5 ms/div in horizontal which represent the time  and 5 V/div in vertical which represents the Volt). Referring to the figure The voltage  Peak to Peak is V_p-p is:

[Image]
- 30 volt
- 30 division
- 15 volt
- 15 division
A: 30 volt

Q: The waveform display on the oscilloscope is shown in the figure: the scales of oscilloscope are  (5 ms/div in horizontal which represent the time  and 5 V/div in vertical which represents the Volt). Referring to the figure The Frequency of the wave is:

[Image]
- 11 ms
- 21 ms
- 47.6 Hz
- 95 Hz
A: 47.6 Hz

Q: The waveform display on the oscilloscope is shown in the figure: the scales of oscilloscope are  (5 ms/div in horizontal which represent the time  and 5 V/div in vertical which represents the Volt). Referring to the figure The period of the wave is:

[Image]
- 11 ms
- 21 ms
- 47.6 Hz
- 95 Hz
A: 21 ms

Q: What is the resistance of a resistor with color code orange-white-brown?
- 480 Ω
- 390 Ω
- 39Ω
- 380 Ω
A: 390 Ω

Q: The relationship between the voltage and current in ohms experiment are shown in the following figure: the slope represents the resistance equal:

[Image]
- 100 Ω
- 250 Ω
- 500 Ω
- 125 Ω
A: 500 Ω

Q: In the figure shown: If the  voltage  4 Volt and the resistance 200 Ω, the current in Ammeter  equal :

[Image]
- 20 mA
- 10 mA
- 15 mA
- 5 mA
A: 20 mA

Q: A solenoid 10.0 cm long has 500 turns and carries a current of 2 A. the magnetic field strength inside this coil is
- 12.5 mT
- 1.25 mT
- 6 mT
- 0.6mT
- None
A: 12.5 mT

Q: A solenoid 15.0 cm long has 600 turns and carries a current of 5.0 A. if 2.0 cm segment of a current balance arm is balanced inside the solenoid when the current in it is 3.0 A.  The magnetic force on the segment is
- 1.5 x 10 ^-3 N
- 2.5 x 10 ^-3 N
- 0.5 x 10 ^-3 N
- 3 x 10 ^-3 N
- None
A: 1.5 x 10 ^-3 N

Q: A solenoid 10.0 cm long has 500 turns and the magnetic field strength inside this coil is 25 mT, it carries a current of
- 4 A
- 8 A
- 2A
- 0.5 A
- None
A: 4 A

Q: The magnetic field strength inside a certain solenoid is 0.025 T. If a 3.2 cm conducting strip, which is perpendicular to the magnetic field inside the solenoid, experiences a force of 5.9X10^−4 N, the current in the conducting strip is
- 0.74 A
- 2 A
- 1.5 A
- 0.07 A
- None
A: 0.74 A

Q: Using the figure on the side, when the switch S is put in position a

[Image]
- The capacitor is charging and the current is maximum
- The capacitor discharging and the current is maximum
- The capacitor is discharging and the current is minimum
- The capacitor is charging and the current is minimum
A: The capacitor is charging and the current is maximum

Q: Using the figure on the side, when the switch S is put in position b (assuming the initial charge on the capacitor is not zero)

[Image]
- The capacitor is discharging and the current is maximum
- The capacitor charging and the current is maximum
- The capacitor is charging and the current is minimum
- The capacitor is discharging and the current is minimum
A: The capacitor is discharging and the current is maximum

Q: [Image]The figure on the side is showing how the voltage on the capacitor in an RC-circuit changes with time

The time needed for the capacitor to lose half its maximum charge
- 20 sec
- 30 sec
- 40 sec
- 80 sec
A: 20 sec

Q: [Image]The figure on the side is showing how the voltage on the capacitor in an RC-circuit changes with time.

The time constant \(  \tau \) for the circuit is
- 30 sec
- 13 sec
- 40 sec
- 80 sec
A: 30 sec

Q: [Image]The figure on the side is showing how the voltage on the capacitor in an RC-circuit changes with time

If the capacitor has a magnitude of 30 µF, then the resistor R has the value of
- 1 M\( \Omega \)
- 30 M\( \Omega \)
- 30 \( \Omega \)
- 10 \( \Omega \)
A: 1 M\( \Omega \)

Q: The resistance of copper is 100   at 0°c then it increases linearly up to 100°c. At a temperature of -234.5°C the resistance of copper is almost zero as shown in the figure

Find the temperature coefficient of the resistance(\( \alpha \))

[Image]
- 3.26x10^-3 C^-1
- 4.26x10^-3 C^-1
- 5.26x10^-3 C^-1
- 6.26x10^-3 C^-1
A: 4.26x10^-3 C^-1
Feedback: a-^ b- c- d-

Q: -If the point C is at 50 cm  the galvanometer G reads a current of 0 A  and

 If the point C is at 40 cm  the galvanometer G reads a current of 0.1 A

 what is the value of internal resistance r in (Ω) of the unknown battery is,

[Image]
- 3
- 4
- 2.4
- 6
A: 6

Q: In the circuit shown in the figure the power supply voltage = 10 volts, the length of the wire AB= 100 cm. The length of the wire BC = 40 cm where the galvanometer reads zero

Find the electro motive force of the cell E in volt

[Image]
- 4
- 3
- 6
- 10
A: 4

Q: when the switch is closed the galvanometer reads zero when L_AB=100 cm,  L_AC= 30 cm. and \( \epsilon \)=4 volt.

 Find the  internal resistance r in ohms

[Image]
- 10
- 1
- 3
- 7
A: 1

Q: In the circuit V_bc =20  volt  and V_de =15 volt find

V_ab  ,   V_bd

[Image]
- (10,5)volt
- (15,10)volt
- (5,15)volt
- (20,10)volt
A: (10,5)volt

Q: In the circuit  Find I₁.

[Image]
- 1
- 2
- 3
- 4
A: 1

Q: A wire has a resistance of 3.1 \( \Omega \) at 30 C^o and a resistance of 4.52 \( \Omega \) at  100 C°. The temperature coefficient of resistance of the wire is:
- a- 0.0065 C^-1
- 0.0025 C^-1
- 0.0012C^-1
- 0.0085 C^-1
A: a- 0.0065 C^-1

Q: An electric circuit consists of four resistors, R₁ = 12 Ω, R₂= 12 Q, R3= 3Ω and R4=6 Ω, are connected with source of emf E₁ = 6 V, E2 = 12 V. Determine the electric current flows in the circuit (in A ) as shown  in figure below

[Image]
- 0.2
- 0.4
- 0.6
- 0.8
A: 0.4

Q: A metre bridge is set-up as shown, to determine an unknown resistance R using a standard 55Ω resistor. The galvanometer shows null point when tapping-key is at 20 cm mark. The determined value of R is:

[Image]
- 29Ω
- 220Ω
- 13.7Ω
- 0.072Ω
A: 220Ω

Q: -A student made the potentiometer experiment in order to determine the electromotive force (E_x) of an unknown cell and its internal resistance (r), and the student get a graph of (voltage Vs. current) shown in Figure, from the graph find r in ohms.

[Image]
- 1
- 2
- 3
- 5
A: 5

Q: The unit of the temperature coefficient (\( \alpha \)) is
- [Image]
- [Image]
- [Image]
- [Image]
A: [Image]

Q: The resistivity of certain metals becomes zero at
- Very high temperatures
- 0
- Very low temperatures
- Room temperatures
A: Very low temperatures

Q: Determine the value of the unknown capacitance C  in (  µF)   , which would balance the AC Bridge in Figure.

[Image]
- 1120
- 91
- 200
- 700
A: 1120

Q: The detector used to detect the balance point in the AC bridge is
- Galvanometer
- Ammeter
- Voltmeter
- Oscilloscope
A: Oscilloscope

Q: The resistance of copper is 100   at 0°c then it increases linearly up to 100°c. At a temperature of -234.5°C the resistance of copper is almost zero as shown in the figure

Find the resistance  R  at 100 ^0 C  in ohms .

[Image]
- 142.6
- 242.6
- 150
- 200
A: 142.6