PHY 201 CBT PRACTICE TEST

Ace/Undergragra March 26, 2023

0 86 1 minute read

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Take your time to read instructions before taking this test.

There are 40 questions which you are to answer in 15 minutes that gives you roughly 30 seconds per question.

If you can get at least 60%, you can be rest assured that you’ll ace CHM 203 exam

In a normal exam you will be asked between 40 – 60 questions but I only arranged 40 questions

Note

Do not be in a hurry to answer the questions

Do not waste time on a question you don’t know

Move as fast as possible and starting with questions that don’t have calculation first to save time

Always crosscheck

Don’t be in a hurry to submit, you are not in a competition

Don’t be scared. Getting an A is easy

Don’t be over confident, you can end up a D, E or F. Calm your blood, no be only you sabi book

Please do well to use our comment box incase there’s a message you want to pass to us

70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

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Created on March 26, 2023 By

Ace/Undergragra

PHY 201

1 / 36

1. Lorentz transformation equations hold for

A. Non - relativistic velocities only

B. All velocities: relativistic & non-relativistic

C. Relativistic velocities only

D. Photons only

2 / 36

2. Which of the following laws do not form a Maxwell equation?

A. Ampere’s Law

B. Gauss’s Law

C. Faraday’s Law

D. Planck’s Law

3 / 36

3. Einstein energy mass equivalence is application on all the following except

A. Find the quality of the material

B. Find binding energy in atomic Nucleus

C. Nuclear fission and fusion integration

D. Radioactivity

4 / 36

4. The property of magnetic field to converge electrons is used in microscopes as

___________

A. Magnetic Convergence

B. Magnetic plate

C. Magnetic field

D. Magnetic Lens

5 / 36

5. The divergence of which quantity will be zero

A. D

B. B

C. E

D. H

6 / 36

6. Lorentz transformations are based on the principle of consistency of the velocity of
light.

A. True

B. False

7 / 36

7. What would be the mass of the body at rest,i fit explodes into two objects of mass 2
kg each moving with a speed 0.8c relative to the original body

A. 4Kg

B. 6.7Kg

C. 6.2Kg

D. 5.4Kg

8 / 36

8. If the velocity of a charged particle in perpendicular electric and magnetic field is

7.27X10^6 m/s and the Electric field is 6X10^6 N/c,what should be the value of magnetic

field for velocity sector?

A. 0.45 T

B. 0.83 T

C. 0.78 T

D. 0.94 T

9 / 36

9. Increase in all inputs by a certain percentage resulting in a relatively higher percentage increase in output is referred to as:

A. Constant returns of scale

B. Diminishing Returns

C. Decreasing returns to scale

D. Increasing returns to scale

E. Law of variable proportion

10 / 36

10. Find the electric Flux density of a material with charge density 16 units in unit volume

A. 1/16

B. 162

C. 16

D. 16t

11 / 36

11. The Faraday’s law states about which type of EMF

A. Back EMF

B. TransformerE MF

C. Secondary EMF

D. Generator EMF

12 / 36

12. In vacuum or free space, what observations are made?

A. ρ=ρo, J=0

B. ρ=0, J=Jo

C. ρ=0, J=0

D. ρ=ρo, J=Jo

13 / 36

13. In an electromagnetic wave, the electric field of amplitude 6.2V/m oscillates with a
frequency of 2.4X10
10Hz. The Energy density of the wave is__________

A. 1.4X10^ -10 J/m^ 3

B. 4.4X10^ -10 J/m^ 3

C. 2.4X10 ^-10 J/m^3

D. 3.4X10^-10 J/m^ 3

14 / 36

14. The output per unit of the variable factor employed is called

A. Average product

B. Productivity of labour

C. Average cost

D. Total product

E. Marginal product

15 / 36

15. Which of the following is the expression for the continuity equation?

A. dρ/dt+div.J=0

B. ρ+J=0

C. dρ/dt+J=0

D. ρ+divJ=0

16 / 36

16. In Lorentzian relativity, if two events are simultaneous for one observer, they will be

simultaneous for all other observers as well.

A. True

B. False

17 / 36

17. Which of the following is the expression for Lorentz force

A. q(vXB)

B. qE

C. qE+q(vXB)

D. ma+qE

18 / 36

18. The basic theorem/ principle used to obtain mass-energy relation is_____________

A. Heisenberg’s Uncertainty Principle

B. Momentum Conservation Theorem

C. Work - Energy Theorem

D. Maxwell Theorem

19 / 36

19. Find the Flux enclosed of a material of Flux density 12 units in area of 80cm

A. 9.6

B. 12/80

C. 12/0.8

D. 80/12

20 / 36

20. A point charge of 10X10-6C is at the centre of a cubical Gaussian surface of sides
0.5m. What is the flux for the surface?

A. 1.12X10^5 Nm^2/C

B. 3.45X10^5 Nm^2/C

C. 3.12X10^5 Nm^2/C

D. 2.45X10^5 Nm^2/C

21 / 36

21. Two particles approach each other with a speed 0.8c with respect to the laboratory.

Their relative speed is___________

A. 0.912c

B. 0.975c

C. 0.85c

D. 0.95c

22 / 36

22. A particle of mass ‘m0’ moves with speed 0.8c, where ‘c’ is the speed of light in

vacuum.The relativistic kinetic energy of the particle is nearly

A. m0c ^2

B. 1.66m0c^2

C. 0.66m0c^2

D. 0.32m0c^2

23 / 36

23. Which of the following is Einstein’s mass energy relation?

A. Ek=mv^2/c^2

B. E^2–p^2c^2=m0^ 2c^4

C. Ek=(m–m0)c^2

D. E=mc^2

24 / 36

24. Differential form of Gauss’s law in magneto statics is_____________

A. div B=0

B. div B=-dB/dT

C. div B=ρ/εo

D. div B=μJ

25 / 36

25. For Pair Production phenomenon to occur the photon must have energy,greater than

or equal to____________

A. 1.02MeV

B. 0.32MeV

C. 0.85MeV

D. 0.51MeV

26 / 36

26. The velocity of a charged particle to keep moving in the same direction, in a region

where electric and magnetic fields are perpendicular to each other ,is_______________

A. E/B+qE/B

B. E/B

C. B/E+qB/E

D. B/E

27 / 36

27. Magnetic field can be produced by___________

A. Both conduction and displacement current

B. It is produced naturally

C. Conduction current

D. Displacement current

28 / 36

28. Find the charge density when the electric Flux density is given by 2xi+3yj+4zk

A. 9

B. 10

C. 24

D. 0

29 / 36

29. In metals which of the following equation will hold good?

A. Curl(H)=D

B. Curl(J)=dB/dt

C. Curl(J)=dD/dt

D. Curl(H)=J

30 / 36

30. The charge build up in the capacitor is due to which quantity?

A. Conduction current

B. Direct current

C. Displacement current

D. Convection current

31 / 36

31. Find the Maxwell law derived from Ampere law

A. Div(I)=H

B. Div(H)=J

C. Curl(H)=J

D. Curl(B)=D

32 / 36

32. The entire theory of electromagnetic waves is contained in Maxwell’s equations.

A. Partly True

B. False

C. True

33 / 36

33. When a particle is moving with a velocity of v light c relative to S, its velocity as

observed by an observer in the frame S

’ is_____________

A. Zero

B. c

C. 0.75c

D. 0.5c

34 / 36

34. In which of the following form scan Maxwell’s equation not be represented?

A. Static

B. Integral

C. Harmonic

D. Differential

35 / 36

35. In the case v<<c, Lorentz transformation is the same as____________

A. Einstein’s transformation

B. Planck’s transformation

C. Galilean transformation

D. Maxwell’s transformation

36 / 36

36. Two particles approach each other with a velocity of 0.9c.What is their relative

velocity as observed by A

A. 0.99c

B. 0.9c

C. 0.94c

D. 0

Your score is

The average score is 52%

Please do well to drop a comment if this has really helped you. Thanks❤️

Ace/Undergragra March 26, 2023

0 86 1 minute read

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