A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?

Related Mcqs:

1. 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

2. A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance _______?

   A. Ceramic capacitor
   B. Mica capacitor
   C. Both will have identical value of capacitance
   D. It depends on applied voltage

3. 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

4. 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

5. The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to _________ percent of its value

   A. 37, initial
   B. 62, initial
   C. 62, final
   D. 37, final

6. If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because__________________?

   A. varying voltage produces the charging and dicharging currents
   B. of high peak value
   C. charging current can flow
   D. discharge current can flow

7. For making a capacitor, it is better to select a dielectric having___________?

   A. low permittivity
   B. high permittivity
   C. permittivity same as that of air
   D. permittivity slightly more than that of air

8. A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be_____________?

   A. 10 F
   B. 10 uF
   C. 100 nF
   D. 1000 uF

9. If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is___________?

   A. charged
   B. short-circuited
   C. lossy
   D. satisfactory

10. When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of_____________?

    A. 2 joules
    B. 4 joules
    C. 6 joules
    D. 8 joules