21. When the area of a cross-section of the plate increases, what happens to the force between the plates?
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
22. When the potential gradient increases, what happens to the force between the plates?
A. Increases
B. Decreases
C. Remains the same
D. becomes zero
23. In which of the following mediums, will the force of attraction between the plates of a capacitor be greater?
A. Air
B. Water
C. Does not depend on the medium
D. Cannot be determined
24. A metal parallel plate capacitor has a 100mm diameter and the distance between the plates is 1mm. The capacitor is placed in the air. Calculate the force on each plate if the potential difference between the plates is 1kV.
A. 350N
B. 0.035kN
C. 0.035N
D. 3.35kN
25. A metal parallel plate capacitor has a 100mm diameter and the distance between the plates is ‘a’ mm. The capacitor is placed in the air. The force on each plate is 0.035N and the potential difference between the plates is 1kV. Find ‘a’.
A. 1m
B. 1cm
C. 10cm
D. 1mm
26. A metal parallel plate capacitor has ‘an a’mm diameter and the distance between the plates is 1mm. The capacitor is placed in the air. The force on each plate is 0.035N and the potential difference between the plates is 1kV. Find ‘a’.
A. 10mm
B. 100mm
C. 1000m
D. 1000cm
27. A metal parallel plate capacitor has a 100mm diameter and the distance between the plates is 1mm. The capacitor is placed in the air. Calculate the potential difference between the plates if the force on each plate is 0.035N.
A. 1kV
B. 1V
C. 2kV
D. 2V
28. What happens to the force of attraction between the capacitors when the potential difference between the plates decreases?
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
29. What happens to the force of attraction between the capacitors when the distance of separation between the plates increases?
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
30. The unit for dielectric strength is ____________
A. V/m2
B. MV/m2
C. MV/m
D. Vm