PHY 201 CBT PRACTICE TEST

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

2. 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?

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

___________

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

or equal to____________

5. Magnetic field can be produced by___________

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

7. 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__________

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

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

simultaneous for all other observers as well.

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

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

12. Find the Maxwell law derived from Ampere law

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

Their relative speed is___________

14. 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_____________

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

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

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

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

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

20. The divergence of which quantity will be zero

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

22. 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

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

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

25. 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?

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

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

velocity as observed by A

28. 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

29. 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_______________

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

31. Lorentz transformation equations hold for

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

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

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

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

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