**41 . ** An electric potential field is produced by points charges 1uc and 4uc located at (-2,1,5) and (1,3,-1) respectively. The energy stored in the field is **5.14mJ.**

**42 . ** For a capacitance of 10uf the potential difference is increased uniformly from 0 to 600v in* 2 *seconds. The charging current must be

**3mA.**

**43 .** The capacitance between two plates increases** with larger plate area and shorter distance between plates.**

* 44 . * A capacitor having a capacitance of 30uf is connected across a 200v dc source. The charging current will be least

**when capacitor is fully charged.**

**45 .** Relaxation time for mica having sigma = 10^-15 mhos/m and E=6 is** 15hrs**.

**46 . ** The current in a single element circuit leads the voltage 65 degree at all times. The circuit element is **a capacitor.**

**47 . ** In case of a lossy capacitor, its series equivalent resistance value will be **large.**

**48 .** A parallel plate capacitor connected to a battery store twice as much charge with a given dielectric as it does with air as dielectric the susceptibility of the dielectric is **1.**

**49 .** The number of image charges for a point charge between 2 conducting plates inclined at an angle of 30 degree to each other **11.**

**50 .** A sphere of one meter radius can attain a maximum potential of **3 million volts**.

**51 . ** A capacitor of 200uf is charged to a potential of 100v. The stored energy in watt seconds will be **100.**

**52 .** A capacitance C is charged through a resistance R. The time constant of the charging circuit is given by **RC.**

**53 . ** The capacity of capacitor used in power factor correction is expressed in terms of **KVAR.**

**54 .** A 3uf capacitor is given charge of 2*10^-3C. The potential difference between the plates in volts is **3000.**

**55 . ** A capacitor is charged and source is then disconnected, When the plates are now separated **potential difference changes.**

**56 .** The dielectric of a charged capacitor experiences **compressive force.**

**57 .** A circuit component that opposes the change in the circuit voltage is **capacitance**

**58 . **A capacitor of 100uf is connected in series with a resistance of 1000 ohm. The time constant of the circuit is **0.1s.**

**59 . ** Three capacitors 2,3 and 6uf respectively are connected in series across a 500v dc supply. Which of the following will be same for all of the three capacitors?** Energy stored**

**60 . ** The dissipating factor of capacitor can be measured by using** schearing bridge**