When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will______________?

Related Mcqs:

1. A 5 μF capacitor has a potential difference across its plates of 200 volts. The charge on the capacitor is____________?

   A. 2.5 x 10-8 C
   B. 10-5 C
   C. 103 C
   D. 4 x 103 C

2. Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleration of an electron placed between them is______________?

   A. 0.56 x 1015 m/s2
   B. 1.5 x 1015 m/s2
   C. 1.6 x 1015 m/s2
   D. 1.76 x 1015 m/s2

3. Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?

   A. Voltage across the plates increases
   B. voltage across the plates decreases
   C. charge on the capacitor decreases
   D. charge on the capacitor increases

4. A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is__________?

   A. 50 joules
   B. 150 joules
   C. 200 joules
   D. 250 joules

5. While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is____________?

   A. short-circuited
   B. open circuited
   C. alright
   D. leaky

6. A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is___________?

   A. 100 kV/m
   B. 10 kV/m
   C. 5 kV/m
   D. 2 kV/m

7. Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________?

   A. 50
   B. 100
   C. 150
   D. 200

8. If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will__________?

   A. decrease
   B. increase
   C. remains unchanged
   D. become zero

9. If mica sheet is placed between the plates of a capacitor the capacity_______________?

   A. increases
   B. decreases
   C. increases then decreases
   D. decreases then increases

10. If free space between the plates of a capacitor is replaced by a dielectric_____________?

    A. The potential difference remains constant capacittance and energy stored increases
    B. The potential difference remains constant capacittance decreases and energy increases
    C. The potential difference decreases but both capacitance and energy increase
    D. both potential difference and capacitance decrease but energy increases