Electrostatics(Electrical Engineering Questions ) Questions and Answers

Question 1. If free space between the plates of a capacitor is replaced by a dielectric_____________?
  1.    The potential difference remains constant capacittance and energy stored increases
  2.    The potential difference remains constant capacittance decreases and energy increases
  3.    The potential difference decreases but both capacitance and energy increase
  4.    both potential difference and capacitance decrease but energy increases
Explanation:-
Answer: Option C. -> The potential difference decreases but both capacitance and energy increase
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. The electric lines of force are____________?
  1.    imaginary
  2.    physically existing every where
  3.    physically existing near the charges
  4.    depends upon case
Explanation:-
Answer: Option A. -> imaginary
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. An electric field can deflect_______________?
  1.    Neutrons
  2.    X-rays
  3.    Both glass rod and silk acquire a negative charge
  4.    None
Explanation:-
Answer: Option D. -> None
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. If the distance between the two point charges become half then force between them becomes______________?
  1.    double
  2.    half
  3.    four times
  4.    remains same
Explanation:-
Answer: Option C. -> four times
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. The electric charge of 100 °C is 13cm apart from another charge 16.9°C electric force between them is_____________?
  1.    9x107N
  2.    900N
  3.    9x105N
  4.    9x106N
Explanation:-
Answer: Option B. -> 900N
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. Electric flux linked with a surface will be maximum when____________?
  1.    The surface is held parallel to the electric field
  2.    The surface is held perpendicular to the electric field
  3.    The surface makes an angle of 45°with the field
  4.    All of the above
Explanation:-
Answer: Option B. -> The surface is held perpendicular to the electric field
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become_____________?
  1.    1/4th of its original value
  2.    1/8th of its original value
  3.    4 times of its original value
  4.    8 times of its original value
Explanation:-
Answer: Option C. -> 4 times of its original value
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. The value of the capacitance depends upon the________________?
  1.    voltage applied
  2.    thickness of the capacitor plates
  3.    geometry of the capacitor
  4.    dinsity of the capacitor plates
Explanation:-
Answer: Option C. -> geometry of the capacitor
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be_________________?
  1.    900 volts
  2.    9000 volts
  3.    90 volts
  4.    zero
Explanation:-
Answer: Option B. -> 9000 volts
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. Potential difference is the work done in moving unit positive charge form one point to another________________?
  1.    in the direction of electric intensity
  2.    against electric intensity
  3.    in any direction
  4.    in the direction of electric flux
Explanation:-
Answer: Option B. -> against electric intensity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
© Lakshya_Education.com, All Right Reserved.
Contact Us services