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

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Created on March 26, 2023 By

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PHY 201

1 / 36

1. Find the Maxwell law derived from Ampere law

A. Curl(H)=J

B. Curl(B)=D

C. Div(I)=H

D. Div(H)=J

2 / 36

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

A. Find the quality of the material

B. Nuclear fission and fusion integration

C. Find binding energy in atomic Nucleus

D. Radioactivity

3 / 36

3. 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. 0.32m0c^2

C. 1.66m0c^2

D. 0.66m0c^2

4 / 36

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

A. Conduction current

B. Convection current

C. Displacement current

D. Direct current

5 / 36

5. 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. 3.45X10^5 Nm^2/C

B. 2.45X10^5 Nm^2/C

C. 3.12X10^5 Nm^2/C

D. 1.12X10^5 Nm^2/C

6 / 36

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

A. div B=μJ

B. div B=ρ/εo

C. div B=0

D. div B=-dB/dT

7 / 36

7. 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

8 / 36

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

A. Marginal product

B. Productivity of labour

C. Average product

D. Average cost

E. Total product

9 / 36

9. 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

10 / 36

10. 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. Law of variable proportion

C. Increasing returns to scale

D. Diminishing Returns

E. Decreasing returns to scale

11 / 36

11. 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

12 / 36

12. Lorentz transformation equations hold for

A. All velocities: relativistic & non-relativistic

B. Relativistic velocities only

C. Photons only

D. Non - relativistic velocities only

13 / 36

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

A. True

B. False

C. Partly True

14 / 36

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

A. ρ=0, J=0

B. ρ=ρo, J=Jo

C. ρ=ρo, J=0

D. ρ=0, J=Jo

15 / 36

15. Magnetic field can be produced by___________

A. It is produced naturally

B. Conduction current

C. Both conduction and displacement current

D. Displacement current

16 / 36

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

A. 16

B. 16t

C. 162

D. 1/16

17 / 36

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

A. Curl(H)=D

B. Curl(H)=J

C. Curl(J)=dD/dt

D. Curl(J)=dB/dt

18 / 36

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

A. Ek=mv^2/c^2

B. E=mc^2

C. Ek=(m–m0)c^2

D. E^2–p^2c^2=m0^ 2c^4

19 / 36

19. The divergence of which quantity will be zero

A. H

B. D

C. E

D. B

20 / 36

20. 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. Zero

C. 0.75c

D. 0.5c

21 / 36

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

A. Galilean transformation

B. Maxwell’s transformation

C. Einstein’s transformation

D. Planck’s transformation

22 / 36

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

___________

A. Magnetic Convergence

B. Magnetic Lens

C. Magnetic plate

D. Magnetic field

23 / 36

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

A. 9.6

B. 12/0.8

C. 12/80

D. 80/12

24 / 36

24. 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. 6.2Kg

B. 4Kg

C. 5.4Kg

D. 6.7Kg

25 / 36

25. 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. 2.4X10 ^-10 J/m^3

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

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

26 / 36

26. 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

27 / 36

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

A. qE

B. qE+q(vXB)

C. ma+qE

D. q(vXB)

28 / 36

28. 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. E/B+qE/B

C. B/E+qB/E

D. B/E

29 / 36

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

or equal to____________

A. 0.85MeV

B. 0.32MeV

C. 1.02MeV

D. 0.51MeV

30 / 36

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

A. Static

B. Differential

C. Integral

D. Harmonic

31 / 36

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

A. Gauss’s Law

B. Ampere’s Law

C. Planck’s Law

D. Faraday’s Law

32 / 36

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

A. 24

B. 9

C. 0

D. 10

33 / 36

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

A. TransformerE MF

B. Back EMF

C. Secondary EMF

D. Generator EMF

34 / 36

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

A. Heisenberg’s Uncertainty Principle

B. Work - Energy Theorem

C. Maxwell Theorem

D. Momentum Conservation Theorem

35 / 36

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

velocity as observed by A

A. 0.94c

B. 0.9c

C. 0.99c

D. 0

36 / 36

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

A. False

B. True

Your score is

The average score is 49%

PHY 201 CBT PRACTICE TEST

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