Home > CompTIA A+ Exam > Quizzes > Electric Charges and Fields
Electric Charges and Fields
Fast practice, instant feedback. Timer auto-submits when time’s up.
Avg score: 66% • Most missed: “Which of the following is positively charged?”
Electric Charges and Fields
Time left 00:00
25 Questions

1. If E and B represent electric and magnetic fieldvectors of the electromagnetic waves - then the directionof propagation of the waves will be along [2002]
2. Two metallic spheres of radii 1 cm and 3 cm aregiven charges of -“1 × 10-“2 C and 5 × 10-“2 C - respectively.If these are connected by a conducting wire - the finalcharge on the bigger sphere is: [2012M]
3. A signal emitted by an antenna from a certain pointcan be received at another point of the surface in theform of [1993]
4. The structure of solids is investigated by using
5. Two positive ions - each carrying a charge q - areseparated by a distance dIf F is the force of repulsionbetween the ions - the number of electrons missing fromeach ion will be (e being the charge of an electron)[2010]
6. An electric dipole of moment ´p´ is placed in anelectric field of intensity ´E´The dipole acquires aposition such that the axis of the dipole makes an angle θwith the direction of the fieldAssuming that thepotential energy of the dipole to be zero when = 90° - thetorque and the potential energy of the dipole willrespectively be: [2012]
7. The oscillating electric and magnetic field vectors ofelectromagnetic wave are oriented along
8. The frequencies of X-rays - γ -rays and ultravioletrays are respectively a - b - and cThen [2000]
9. Which of the following is positively charged?
10. Which one of the following rays is notelectromagnetic wave? [2003]
11. A hollow insulated conduction sphere is given apositive charge of 10 PCWhat will be the electric field atthe centre of the sphere if its radius is 2 metres? [1998]
12. A particle of mass m and charge q is placed at restin a uniform electric field E and then releasedThekinetic energy attained by the particle after moving adistance y is [1998]
13. The ratio of amplitude of magnetic field to theamplitude of electric field for an electromagnetic wavepropagating in vacuum is equal to: [2012M]
14. Point charges + 4q - -“q and +4q are kept on the Xaxis at points x =0 - x =a and x = 2a respectively[1988]
15. The formation of a dipole is due to two equal anddissimilar point charges placed at a [1996]
16. An electric dipole - consisting of two oppositecharges of 2 × 10 -“6 C each separated by a distance 3 cmis placed in an electric field of 2 × 10 5 N/CTorque actingon the dipole is [1995]
17. A point Q lies on the perpendicular bisector of anelectrical dipole of dipole moment pIf the distance of Qfrom the dipole is r (much larger than the size of thedipole) - then the electric field at Q is proportional to[1998]
18. The electric potential V at any point (x - y - z) - all inmeters in space is given by V= 4x 2 voltThe electric fieldat the point (1 - 0 - 2) in volt/meter is [2011M]
19. There is an electric field E in x-directionIf the workdone on moving a charge of 0.2 C through a distance of 2m along a line making an angle 60° with x-axis is 4J - thenwhat is the value of E? [1995]
20. From a point charge - there is a fixed point AAt A - there is an electric field of 500 V/m and potentialdifference of 3000 VDistance between point charge andA will be [1997]
21. Which of the following electromagnetic radiationshas the least wavelength? [2002]
22. The mean free path of electrons in a metal is 4 ×10-“8 mThe electric field which can give on an average 2eV energy to an electron in the metal will be in units ofV/m [2009]
23. An electric dipole of dipole moment p is alignedparallel to a uniform electric field EThe energy requiredto rotate the dipole by 90° is [NEETKar2013]
24. The electric and magnetic field of anelectromagnetic wave are [2007]
25. The electromagnetic radiations are caused by

⚡ Recently practiced quizzes in this topic
Live quiz activity
Comptia A+ Port Numbers CompTIA A+ Windows Command Line A+ Guide To IT Technical Support Glossary CompTIA A+ Certification 802 Exam Practice CompTIA A+ 220-801 Exam A+ Guide To IT Technical Support - Network Hardware CompTIA A+ 220-901 Exam Practice Questions CompTIA A+ 220-901 Practice Questions Comptia A+ 220-902 Exam Terms A+ Guide To IT Technical Support - Hard Drives and Other Storage Devices
 
❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

🌈  Our mission is to help improve your scores in any subject and exam withonline quizzes, practice tests, study guides, & advice for students. Since 2018.
About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | What Should We Know?
Privacy | Terms |
Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.