PHY 201 CBT PRACTICE TEST

Ace/Undergragra March 26, 2023

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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

I wish you success

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Created on March 26, 2023 By

Ace/Undergragra

PHY 201

1 / 36

1. 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

2 / 36

2. 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. 0.94 T

B. 0.83 T

C. 0.45 T

D. 0.78 T

3 / 36

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

A. Galilean transformation

B. Maxwell’s transformation

C. Planck’s transformation

D. Einstein’s transformation

4 / 36

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

A. ρ=ρo, J=Jo

B. ρ=0, J=0

C. ρ=0, J=Jo

D. ρ=ρo, J=0

5 / 36

5. 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

B. B/E

C. B/E+qB/E

D. E/B+qE/B

6 / 36

6. The divergence of which quantity will be zero

A. B

B. E

C. D

D. H

7 / 36

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

A. False

B. True

8 / 36

8. 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. 2.45X10^5 Nm^2/C

B. 3.12X10^5 Nm^2/C

C. 3.45X10^5 Nm^2/C

D. 1.12X10^5 Nm^2/C

9 / 36

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

A. q(vXB)

B. qE

C. qE+q(vXB)

D. ma+qE

10 / 36

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

A. Displacement current

B. Convection current

C. Conduction current

D. Direct current

11 / 36

11. 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. 0.66m0c^2

B. 0.32m0c^2

C. m0c ^2

D. 1.66m0c^2

12 / 36

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

simultaneous for all other observers as well.

A. False

B. True

13 / 36

13. Magnetic field can be produced by___________

A. Conduction current

B. Both conduction and displacement current

C. Displacement current

D. It is produced naturally

14 / 36

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

___________

A. Magnetic Lens

B. Magnetic field

C. Magnetic Convergence

D. Magnetic plate

15 / 36

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

A. Total product

B. Average product

C. Average cost

D. Productivity of labour

E. Marginal product

16 / 36

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

A. Ek=(m–m0)c^2

B. Ek=mv^2/c^2

C. E^2–p^2c^2=m0^ 2c^4

D. E=mc^2

17 / 36

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

A. Partly True

B. False

C. True

18 / 36

18. Lorentz transformation equations hold for

A. Relativistic velocities only

B. All velocities: relativistic & non-relativistic

C. Photons only

D. Non - relativistic velocities only

19 / 36

19. 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. c

B. 0.75c

C. 0.5c

D. Zero

20 / 36

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

A. 16t

B. 16

C. 1/16

D. 162

21 / 36

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

Their relative speed is___________

A. 0.95c

B. 0.912c

C. 0.975c

D. 0.85c

22 / 36

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

or equal to____________

A. 0.32MeV

B. 0.51MeV

C. 0.85MeV

D. 1.02MeV

23 / 36

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

A. 24

B. 10

C. 0

D. 9

24 / 36

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

A. Ampere’s Law

B. Planck’s Law

C. Gauss’s Law

D. Faraday’s Law

25 / 36

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

A. Diminishing Returns

B. Decreasing returns to scale

C. Law of variable proportion

D. Constant returns of scale

E. Increasing returns to scale

26 / 36

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

A. Integral

B. Harmonic

C. Static

D. Differential

27 / 36

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

A. 9.6

B. 80/12

C. 12/80

D. 12/0.8

28 / 36

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

A. Back EMF

B. Generator EMF

C. Secondary EMF

D. TransformerE MF

29 / 36

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

A. dρ/dt+div.J=0

B. dρ/dt+J=0

C. ρ+J=0

D. ρ+divJ=0

30 / 36

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

A. div B=-dB/dT

B. div B=μJ

C. div B=0

D. div B=ρ/εo

31 / 36

31. 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. 6.7Kg

B. 4Kg

C. 6.2Kg

D. 5.4Kg

32 / 36

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

A. Maxwell Theorem

B. Work - Energy Theorem

C. Heisenberg’s Uncertainty Principle

D. Momentum Conservation Theorem

33 / 36

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

A. Curl(J)=dB/dt

B. Curl(H)=J

C. Curl(H)=D

D. Curl(J)=dD/dt

34 / 36

34. 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. 3.4X10^-10 J/m^ 3

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

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

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

35 / 36

35. Find the Maxwell law derived from Ampere law

A. Curl(B)=D

B. Curl(H)=J

C. Div(I)=H

D. Div(H)=J

36 / 36

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