MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The divergence of distance vector is |
| A. | 0 |
| B. | 3 |
| C. | 2 |
| D. | 1 |
| Answer» C. 2 | |
| 2. |
Find the work done moving a charge 2C having potential V = 24volts is |
| A. | 96 |
| B. | 24 |
| C. | 36 |
| D. | 48 |
| Answer» E. | |
| 3. |
Find the potential at a point (4, 3, -6) for the function V = 2x2y + 5z. |
| A. | 96 |
| B. | 66 |
| C. | 30 d) -66 |
| Answer» C. 30 d) -66 | |
| 4. |
Find the electric potential for an electric field 3units at a distance of 2m. |
| A. | 9 |
| B. | 4 |
| C. | 6 d) 3/2 |
| Answer» D. | |
| 5. |
The electric flux density and electric field intensity have which of the following relation? |
| A. | linear |
| B. | nonlinear |
| C. | inversely linear |
| D. | inversely nonlinear |
| Answer» B. nonlinear | |
| 6. |
Find the potential of the function V = 60cos θ/r at the point P(3, 60, 25). |
| A. | 20 |
| B. | 10 |
| C. | 30 |
| D. | 60 |
| Answer» C. 30 | |
| 7. |
With Gauss law as reference which of the following law can be derived? |
| A. | ampere law |
| B. | faraday’s law |
| C. | coulomb’s law |
| D. | ohm’s law |
| Answer» D. ohm’s law | |
| 8. |
Gauss law cannot be expressed in which of the following forms? |
| A. | differential |
| B. | integral |
| C. | point |
| D. | stokes theorem |
| Answer» E. | |
| 9. |
Gauss law can be used to compute which of the following? |
| A. | permittivity |
| B. | permeability |
| C. | radius of gaussian surface |
| D. | electric potential |
| Answer» D. electric potential | |
| 10. |
Gauss law can be evaluated in which coordinate system? |
| A. | cartesian |
| B. | cylinder |
| C. | spherical |
| D. | depends on the gaussian surface |
| Answer» E. | |
| 11. |
Gauss law for magnetic fields is given by |
| A. | div(e) = 0 |
| B. | div(b) = 0 |
| C. | div(h) = 0 |
| D. | div(d) = 0 |
| Answer» C. div(h) = 0 | |
| 12. |
The work done by a charge of 10μC with a potential 4.386 is (in μJ) |
| A. | 32.86 |
| B. | 43.86 |
| C. | 54.68 |
| D. | 65.68 |
| Answer» C. 54.68 | |
| 13. |
The total charge of a surface with densities 1,2,…,10 is |
| A. | 11 |
| B. | 33 |
| C. | 55 |
| D. | 77 |
| Answer» D. 77 | |
| 14. |
The Gaussian surface for a point charge will be |
| A. | cube |
| B. | cylinder |
| C. | sphere |
| D. | cuboid |
| Answer» D. cuboid | |
| 15. |
Gauss law cannot be used to find which of the following quantity? |
| A. | electric field intensity |
| B. | electric flux density |
| C. | charge |
| D. | permittivity |
| Answer» E. | |
| 16. |
The Gaussian surface for a line charge will be |
| A. | sphere |
| B. | cylinder |
| C. | cube |
| D. | cuboid |
| Answer» C. cube | |
| 17. |
Divergence theorem is based on |
| A. | gauss law |
| B. | stoke’s law |
| C. | ampere law |
| D. | lenz law |
| Answer» B. stoke’s law | |
| 18. |
The voltage at any point in an ac circuit will be |
| A. | peak voltage |
| B. | rms voltage |
| C. | average voltage |
| D. | source voltage |
| Answer» C. average voltage | |
| 19. |
The potential taken between two points across a resistor will be |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | infinity |
| Answer» C. zero | |
| 20. |
What is the potential difference between 10sinθcosφ/r2 at A(1,30,20) and B(4,90,60)? |
| A. | 2.386 |
| B. | 3.386 |
| C. | 4.386 |
| D. | 5.386 |
| Answer» D. 5.386 | |
| 21. |
The potential difference in an open circuit is |
| A. | zero |
| B. | unity |
| C. | infinity |
| D. | circuit does not exist open |
| Answer» D. circuit does not exist open | |
| 22. |
Find the potential of V = 60sin θ/r2 at P(3,60,25) |
| A. | 5.774 |
| B. | 6.774 |
| C. | 7.774 |
| D. | 8.774 |
| Answer» B. 6.774 | |
| 23. |
A point charge 2nC is located at origin. What is the potential at (1,0,0)? |
| A. | 12 |
| B. | 14 |
| C. | 16 |
| D. | 18 |
| Answer» E. | |
| 24. |
Which of the following correctly states Gauss law? |
| A. | electric flux is equal to charge |
| B. | electric flux per unit volume is equal to charge |
| C. | electric field is equal to charge density |
| D. | electric flux per unit volume is equal to volume charge density |
| Answer» E. | |
| 25. |
The Gaussian surface is |
| A. | real boundary |
| B. | imaginary surface |
| C. | tangential |
| D. | normal |
| Answer» C. tangential | |
| 26. |
The electric flux density is the |
| A. | product of permittivity and electric field intensity |
| B. | product of number of flux lines and permittivity |
| C. | product of permeability and electric field intensity |
| D. | product of number of flux lines and permeability |
| Answer» B. product of number of flux lines and permittivity | |
| 27. |
Electric flux density in electric field is referred to as |
| A. | number of flux lines |
| B. | ratio of flux lines crossing a surface and the surface area |
| C. | direction of flux at a point |
| D. | flux lines per unit area |
| Answer» C. direction of flux at a point | |
| 28. |
The lines of force are said to be |
| A. | real |
| B. | imaginary |
| C. | drawn to trace the direction |
| D. | not significant |
| Answer» D. not significant | |
| 29. |
For a test charge placed at infinity, the electric field will be |
| A. | unity |
| B. | +∞ |
| C. | zero |
| D. | -∞ |
| Answer» D. -∞ | |
| 30. |
Find the force on a charge 2C in a field 1V/m. |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 31. |
Electric field intensity due to infinite sheet of charge σ is |
| A. | zero |
| B. | unity |
| C. | σ/ε |
| D. | σ/2ε |
| Answer» E. | |
| 32. |
The electric field intensity is defined as |
| A. | force per unit charge |
| B. | force on a test charge |
| C. | force per unit charge on a test charge |
| D. | product of force and charge |
| Answer» D. product of force and charge | |
| 33. |
For a charge Q1, the effect of charge Q2 on Q1 will be, |
| A. | f1 = f2 |
| B. | f1 = -f2 |
| C. | f1 = f2 = 0 |
| D. | f1 and f2 are not equal |
| Answer» C. f1 = f2 = 0 | |
| 34. |
The Coulomb law is an implication of which law? |
| A. | ampere law |
| B. | gauss law |
| C. | biot savart law |
| D. | lenz law |
| Answer» C. biot savart law | |
| 35. |
Two charges 1C and -4C exists in air. What is the direction of force? |
| A. | away from 1c |
| B. | away from -4c |
| C. | from 1c to -4c |
| D. | from -4c to 1c |
| Answer» D. from -4c to 1c | |
| 36. |
Find the force between 2C and -1C separated by a distance 1m in air(in newton). |
| A. | 18 x 106 |
| B. | -18 x 106 |
| C. | 18 x 10-6 |
| D. | -18 x 10-6 |
| Answer» C. 18 x 10-6 | |
| 37. |
Coulomb law is employed in |
| A. | electrostatics |
| B. | magnetostatics |
| C. | electromagnetics |
| D. | maxwell theory |
| Answer» B. magnetostatics | |
| 38. |
Coulomb is the unit of which quantity? |
| A. | field strength |
| B. | charge |
| C. | permittivity |
| D. | force |
| Answer» C. permittivity | |
| 39. |
Divergence theorem computes to zero for a solenoidal function. State True/False. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 40. |
Find the divergence theorem value for the function given by (ez, sin x, y2) |
| A. | 1 |
| B. | 0 |
| C. | -1 |
| D. | 2 |
| Answer» C. -1 | |
| 41. |
The Gauss divergence theorem converts |
| A. | line to surface integral |
| B. | line to volume integral |
| C. | surface to line integral |
| D. | surface to volume integral |
| Answer» E. | |
| 42. |
Gauss theorem uses which of the following operations? |
| A. | gradient |
| B. | curl |
| C. | divergence |
| D. | laplacian |
| Answer» D. laplacian | |
| 43. |
Using volume integral, which quantity can be calculated? |
| A. | area of cube |
| B. | area of cuboid |
| C. | volume of cube |
| D. | distance of vector |
| Answer» D. distance of vector | |
| 44. |
The volume integral is three dimensional. State True/False |
| A. | true |
| B. | false |
| Answer» B. false | |
| 45. |
The triple integral is used to compute volume. State True/False |
| A. | true |
| B. | false |
| Answer» B. false | |
| 46. |
The divergence theorem converts |
| A. | line to surface integral |
| B. | surface to volume integral |
| C. | volume to line integral |
| D. | surface to line integral |
| Answer» C. volume to line integral | |
| 47. |
The ultimate result of the divergence theorem evaluates which one of the following? |
| A. | field intensity |
| B. | field density |
| C. | potential |
| D. | charge and flux |
| Answer» E. | |
| 48. |
Evaluate Gauss law for D = 5r2/4 i in spherical coordinates with r = 4m and θ = π/2. |
| A. | 600 |
| B. | 599.8 |
| C. | 588.9 |
| D. | 577.8 |
| Answer» D. 577.8 | |
| 49. |
Coulomb’s law can be derived from Gauss law. State True/ False |
| A. | true |
| B. | false |
| Answer» B. false | |
| 50. |
Surface integral is used to compute |
| A. | surface |
| B. | area |
| C. | volume |
| D. | density |
| Answer» C. volume | |