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

Related Mcqs:

1. The time constant and R-C circuit may also be defined as the time during which the charging current falls to ________ percent of its initial maximum value

   A. 37
   B. 42
   C. 63
   D. 73

2. 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

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

   A. Paper capacitor
   B. Ceramic capacitor
   C. Electrolytic capacitor
   D. Any-of the above

4. The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by__________?

   A. CIR
   B. 1/RC
   C. RC
   D. RIC

5. 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

6. 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

7. 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

8. 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

9. 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

10. In a cable capacitor, voltage gradient is maximum at the surface of the______________?

    A. earth
    B. conduction
    C. sheath
    D. insulator