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SUPREME EDUCATION COUNCIL

PHYSICS PRACTICE EXAM اختبار الفيزياء التجريبي للصف الثاني عشر متقدم

Physics department

2013-2014

21 Advanced Physics

Physics Practice exam - االختبار التجريبي لمادة الفيزياء

G12A - الثاني عشر متقدم

1122-1122

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1

Part 1 (MC) Choose the correct answer:

1- What is the centripetal force that holds planets in there orbits?

a. friction force

b. gravitational force

c. electromagnetic force

d. nuclear force

2- A ventilation fan has blades 0.30 m in radius rotating at 20 rev /min ,

what is the tangential speed of each blade tip?

a. 6.0 m/s

b. 66.7 m/s

c. 0.63 m/s

d. 37.7 m/s



1122-1122

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2

3- A satellite is in a circular orbit around the Earth at a distance of one

Earth radius above the surface. What is the speed of the satellite?

(The radius of the Earth is 6.4 106 m, the mass of earth is 6x 10 24 kg

and G = 6.67 1011 N m2/kg2.)

a. 2800 m/s

b. 4200 m/s

c. 5600 m/s

d. 16800 m/s

4- According to Newton’s law of universal gravitation, the force of

attraction between any two masses is directly related to the ………

a. distance between the masses

c. velocity of the two masses

b. product of the two masses

d. sum of the two masses



1122-1122

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3

5-Which of the following features of a given pendulum changes when the

pendulum is moved from Earth’s surface to the moon?

a. the mass

b. the equilibrium position

c. the length of the pendulum

d. the frequency

6- In simple harmonic motion the acceleration is directly proportional

to…..

a. displacement

b. velocity

c. time of oscillation

d. frequency

7- A certain oscillating mass-spring system has a period of 1.5 s with a

1.0 kg mass. What will the period be when a 4.0 kg mass is substituted

for the 1.0 kg mass?

a. 0.3 s

b. 6.0 s

c. 0.38 s

d. 3.0 s



1122-1122

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4

8- If a simple pendulum is left oscillating it is eventually slows down and

stop , what is the type of this damping ?

a. Light damping

b. Heavy damping

c. Critical damping

d. Forced damping

9 -The figure shows electric field lines produced by two point charges ,

what is the type of each charge ?

a. A is negative while B is positive

b . A is positive while B is negative

c. Both A and B are positive

d. Both A and B are negative



1122-1122

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5

01-What happens to the capacitance of a parallel plate capacitor when a

dielectric is placed between the two plates instead of air ?

a. decreases

b. remains constant

c. may increase or decrease depending on the material of the dielectric

d. increases

11- Two charged objects have a repulsive force of 0.04 N. If the distance

separating the objects is doubled, then what is the new force ?

a. 0.16 N

b. 0.08 N

c. 0.02 N

d. 0.01 N

12- How much work is done to transfer 4𝝁C of charge through a potential

difference of 12 V?

a. 4.8 x10 -5 J

b. 3x10 6 J

c. 3.3 x 10 -7 J

d. 1.6 x 10 -7 J



1122-1122

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6

13- What did Thomson’s experiment prove about electrons ?

a- electrons have positive charge

b- Electrons are constituents of all atoms

c- Electrons have no mass

d- Charge to mass ratio depends on the type of the gas used .

14- In the figure below , what is the frequency of the emitted photon

when the electron drops from energy state A to energy state B for a

certain atom?

a. 1.59 x 10-52 Hz

b. 1.5 Hz

c. 3.62 x 10 14 Hz

d. 2500 Hz



1122-1122

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7

15- What is the energy of a photon whose wavelength is 300 nm?

a. 6.63 x 10 -21 J

b. 4.72 x 10 -21 J

c. 6.63 x 10 -19 J

d. 4.72 x 10 -36 J

16- Which of the following increases by increasing the stability of the

nucleus?

a. nuclear binding energy

b. nuclear binding energy per nucleon

c. ionization energy

d. work function

17-the volume of given mass of a gas is:

a. Inversely proportional to its pressure at constant temperature.

b. Inversely proportional to its temperature at constant pressure.

c. Inversely proportional to its pressure at variable temperature.

d. Inversely proportional to its temperature at variable pressure



1122-1122

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8

18-If we press a gas slowly to half of its original volume:

a. Its temperature is doubled

b. Its temperature is decreased to half its value.

c. Its pressure is doubled.

d. Its pressure is halved.

19-What is the young’s modulus for a metal if it is under a stress of 108Pa

and the strain 0.0004

a. 4x10-12Pa

b. 4x104Pa

c. 2.5x1011Pa

d. 9.9x107Pa

20-Which of gases laws you can represent it by the equation:

tanv

cons tT

?

a- Boyle’s law

b- Charles’s law

c- Pressure law

d- General law of gases



1122-1122

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9

Part 2(CR) Answer all questions :

21- The asteroid Ceres has a mass of 7x1020 kg and a radius of 500 km .

(Gravitational constant G = 6.67 X 10-11 N m2 /kg2 )

a- What is gravitational field strength on the surface of Ceres?

b-How much would an 85-kg astronaut weigh on Ceres.

22- A pilot is flying a small plane at 60 m/s in a circular path with a radius

of 091 m. The centripetal force needed to maintain the plane’s circular

motion is 2 x 104 N. What is the plane’s mass?



1122-1122

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10

23- An object performs simple harmonic motion, its position given by the

equation:

x(t) = 50 Cos(20π t) in cm.

Find:

a-Maximum value of acceleration.

b- Draw a sketch for displacement – time graph for that object



1122-1122

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11

24- Name the type of damping represented by each figure

Fig 2…………………………………. Fig 1…………………………………..

25- The diagram below shows two parallel conducting plates connected to

a 250 volts supply.

A. What is the type of the charges on plate X?

B. What is the field strength between the two plates?

C. What we mean by the uniform electric field ?



1122-1122

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12

26- A capacitor is charged using a steady current of 40 𝝁A from a 10 V supply. After 25 seconds it is fully charged, calculate:

a. the charge on the capacitor b. the capacitance

27- Using the table on the right find for silicon (28) nucleus

a- the total binding energy of the silicon nucleus

b- The binding energy per nucleon.



1122-1122

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13

28 - The figure below shows how to get practically a certain type of

anatomic spectrum.

a. What is this type of spectrum called?

b. Describe what you can see on the screen.

c. Mention one of the applications of the seen spectrum.



1122-1122

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14

29- A balloon contain a helium gas with volume of 150 m3 under the

Atmospheric presser of 90 kPa if the balloon flight up its volume

Increased to 200 m3 what is the Atmospheric presser at this height? If

temperature is constant?



1122-1122

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15

30- A spring of length 20cm stretched to 24cm when a force of 0.6N

exerted on it Find:

a-the spring constant.

b-the extension of the spring if the force is 0.5N

The end.

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