Placement Test TBAT Physics 2024

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Placement Test TBAT Physics 2024
 
TBAT Placement Test
Placement Test TBAT Physics 2024
 
TBAT Placement Test

Question 1

The magnitude of gravitational acceleration at the surface of Earth is approximately 9.81 m/s2. What is the approximate magnitude of the gravitational acceleration in kilometers per hour squared, km/h2?

1) 0.756×10-3
2) 0.589
3) 2.72
4) 35.3
5) 1.27×105

Question 2

An ultrasound scanner produces an ultrasound pulse with a speed of 1,600 m/s when it travels inside a human body. If the wave is reflected from a fetus 8 cm below the transmitter placed on a woman’s abdomen, how long does it take for the pulse to reach the receiver adjacent to the transmitter?

1) 0.05 ms
2) 0.1 ms
3) 5 ms
4) 10 ms
5) None of the above

Question 3

An object of mass 2.0 kg is thrown at a certain angle from the ground to reach a maximum height of 3.2 m and falls back to the ground.  If the minimum speed of the object in the trajectory is 6.0 m/s, which of the following statements must be CORRECT? Assume there is no air resistance. (g = 10 m/s2)

1) The initial speed of the object is 10 m/s
2) At the highest point, the object had no acceleration.
3) The object’s speed is 8.0 m/s just before it hits the ground.
4) The horizontal distance when the object returns to the initial level is 1.8 m.
5) More than one of them is correct.

Question 4

An object moves along a circular path, as shown in the figure below.

Q4

If it takes 15 seconds to move from point A to point B, 25 seconds to move from point B to point C, and 10 seconds to move from point C to point A. What is the average speed of the object?

1) 1.6 m/s
2) 2.0 m/s
3) 2.4 m/s
4) 5.0 m/s
5) None of them

Question 5

Block A, with a mass of 16 kg, is sliding on a horizontal frictionless plane at a speed of 4 m/s along a straight line when Block A hits Block B, which is directly ahead and sliding in the opposite direction at 2 m/s. Block B has a mass of 12 kg. The collision lasts for 0.5 s, and immediately after the collision, Block A moves in the same direction at 1 m/s. What is the velocity of Block B immediately after the collision, and what is the magnitude of the average resultant force that acts on Block B during the collision?

1)

velocity [m/s]

average resultant force [N]

+2

96
 
2)
 

velocity [m/s]

average resultant force [N]

-2

96
3) 

velocity [m/s]

average resultant force [N]

+6

192
4)

velocity [m/s]

average resultant force [N]

-6

192
5) None of them

Question 6

A rumble ball is released vertically from a certain height of 10 m. It hits the ground and rebounds inelastically in such a way that its mechanical energy is halved every time it hits the ground. Which of the following is the total distance that the rumble ball can travel before it completely stops?

1) 0 m
2) 10 m
3) 20 m
4) 30 m
5) None of the above

Question 7

A box with a mass of 5.0 kg is dragged on a rough surface for a straight distance of 4.0 m. Then, it is dragged straight back to the starting point. Given the kinetic friction coefficient is 0.25, what is the work done by the friction? (g = 10 m/s2)

1) 50 J
2) 100 J
3) 150 J
4) –100 J
5) –50 J

Question 8

Graph 1 shows how the displacement varies with distance in meters at one time for the same wave.

Graph 2 shows how the displacement of one of the particles of a medium varies with time in seconds as a wave travels through the medium.

Which expression gives the speed of the wave?

1)
2) 
3) 
Q8-C-25
4) 
5) None of them

Question 9

1) 1.25 × 10–3 s
2) 2.50 × 10–3 s
3) 4.00 × 10–3 s
4) 5.00 × 10–3 s
5) None of them

Question 10

A loudspeaker is turned on to the ground. The loudspeaker is 10 m away from the ground. There are 3 quiet positions between the loudspeaker and the ground along the vertical axis. How far would a loudspeaker move so that there are 2 quiet positions between the loudspeaker and the ground?

1) 5 m
2) 6 m
3) 7 m
4) 8 m
5) None of them

Question 11

An object with a mass of 3.0 kg attached to a spring whose spring constant is 507 N/m executes simple harmonic motion. If its magnitude of maximum acceleration is 26 m/s2, what is the maximum speed of this motion?

1) 169 m/s
2) 19.5 m/s
3) 13 m/s
4) 6.5 m/s
5) 2 m/s

Question 12

Figure shows a circuit that contains five identical resistors.

The reading on the voltmeter is 2.0 V. What is the voltage across the battery ε?

1) 2 V
2) 8 V
3) 16 V 
4) 24 V
5) Not enough information

Question 13

Three point charges, Q1, Q2, and Q3 are fixed along a straight line: Q1 of +8 nC is placed at x = - 3, Q3 of +1 nC is placed at x = 5. What is the position of Q2 of –8 nC is x = 1 such that the net force on Q1 is zero?

1) x = - 4 
2) x = - 1
3) x = 0
4) x = + 1
5) x = + 4

Question 14

An electron is moving in a uniform magnetic field as shown in the diagram, what will be the particle's trajectory?

1) The particle is moving upward at a constant velocity.
2) The particle is moving downward at a constant velocity.
3) The particle loses speed and moves in the same direction.
4) The particle gains speed and moves in the same direction.
5) None of the above

Question 15

Two infinitely long parallel wires carrying currents of 4 A and 6 A placed in opposite directions, as shown in the figure below. What would be the resultant magnetic field at point P? (Given that 𝜇0 = 4π x 10-7 Tm/A)

1) 1.6 × 10–6 T out of the page
2) 6.4 × 10–6 T out of the page
3) 1.6 × 10–6 T into the page
4) 6.4 × 10–6 T into the page
5) None of the above

Question 16

A conducting circular loop is placed in a uniform magnetic field such that the magnetic field is perpendicular to the plane of this loop, the magnetic flux though in the loop is 𝚽. What would be the magnetic flux when the radius of the loop is doubled?

1) 𝚽/4
2) 𝚽/2
3) 2𝚽
4) 4𝚽
5) None of them

Question 17

An orange light ray with a wavelength of 620 nm passes from air into liquid. Its speed decreases by 25%. What are the wavelength and the color of the light beam in the liquid?

1) 155 nm and the light is invisible
2) 465 nm and the light is blue
3) 465 nm and the light is orange
4) 827 nm and the light is orange
5) 827 nm and the light is invisible

Question 18

In an experiment using a monochromatic light is shone into two narrow slits, which are 1.1 mm apart. The distance between the screen and the slit is 5.5 m. If the width of a bright fringe near the center of the interference pattern is 2.0 mm, what is the wavelength of the light passing through the slits?

1) 2.0 cm
2) 4.0 cm
3) 5.5 cm
4) 200 nm
5) 400 nm

Question 19

According to the Bohr's model of the hydrogen atom, what would be the approximate wavelength of a photon emitted by a hydrogen atom when an electron makes a transition from second exited state to ground state?

Given the ground state energy of a hydrogen atom: E0 = -13.6 eV,

h = 6.626 x 10-34 J·s,

𝑐 = 3 × 108 m/s,

and 1 eV = 1.6 × 10−19 J.

1) 1.64×10–26 m
2) 1.95×10–26 m
3) 1.03×10–7 m
4) 1.22×10–7 m
5) None of them

Question 20

A radioactive substance loses 7/8 of its initial mass in 1.5 hours. What is approximately the half-life of this substance?

1) 30 seconds
2) 30 minutes
3) 90 minutes
4) 6 hours
5) more than 6 hours 
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