Important objective questions


Important objective questions for higher secondary level and Diploma level students :


1. What is the cgs unit of electric

charge?

  1. coulomb

  2. stat coulomb

  3. mili coulomb

  4. ampere


      2. Find the correct dimensional  

          Formula of Electric charge?

  1. [ M1 L1 T-1 ]

  2. [ Mo Lo To C1 ]

  3. [L1 T-1 A-1 ]

  4. [ A1 T1 ]


      3. Minimum charge that can  

          exist is

  1. 1 C

  2. 6.25 × 1018 C

  3. 1.6 × 10-19  C

  4. 0.001 C


      4. How many electons are there 

          in 1 C ?

  1. 1 electron

  2. 1.16 × 10-19 electrons

  3. 6.28 × 1018 electrons

  4. Can't be found


      5. What is the unit of Electric  

          field ?

  1. V / m

  2. Nm2 / C

  3. volt (V)

  4. Nm2 / C2


       6. Find the correct dimensional 

           Formula for Electric field.

  1. [ M1 L1 T-1 A-1 ]

  2. [ M1 L1 T-1 ]

  3. [ M1 L1 T-3 A-1]

  4. [ Mo L1 T-1 A-1]


      7. Find the charge on a body 

           having 2 × 107 electrons.

  1. 3.2 × 10-16 C

  2. 1.6 × 10-16 C

  3. 3.2 × 10-12 C

  4. 1.6 × 1012  C


      8. Two unit charges are placed 

           at unit distance, what would   

           be the force of interaction 

           between them ?

  1. 1 N

  2. 2.56 × 10-38 N

  3. 9 × 109 N

  4. Can't be found


      9.Write the dimensional 

          Formula for absolute 

          electrical Permittivity of    

          medium.

  1. [ M1 L1 T-3 A-1 ]

  2. [ M1 L3 T-1 A-3 ]

  3. [ M-1 L-2 T-4 A-3 ]

  4. [ M-1 L-3 T4 A2 ]


      10. What is the value of 

             absolute electrical 

             permittivity of free space ?

  1. 9 × 109 Nm2 / C2

  2. 8.85 × 10-12 Nm2 / C2

  3. 9 × 10C2 N-1m-2

  4. 8.85 × 10-12 C2 N-1m-2


      11. if a body gives out 109 

            electrons per second, how 

            much time is required to get 

            a total charge of 1 C from 

            it?

  1. 6.25 × 1013 s

  2. 198 year

  3. 6.25 × 1011 s

  4. 158 year


      12. What is the dimensional 

             formula of electric flux?

  1. [ M1 L3 T-3 A-1 ]

  2. [ M1 L3 T-1 A-3 ]

  3. [ M1 L2 T-1 A-1 ]

  4. [ M2 L3 T-2 A-3 ]




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