Electrostatics

41. When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of

2 joules
4 joules
6 joules
8 joules

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11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube
of" class="read-more button" href="https://exam.pscnotes.com/mcq/when-4-volts-e-m-f-is-applied-across-a-1-farad-capacitor-it-will-store-energy-of/#more-45896">Detailed SolutionWhen 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of

42. Mica capacitors are characterised by all of the following except

stable operation
accurate value
low leakage reactance
low losses

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6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube
class="read-more button" href="https://exam.pscnotes.com/mcq/mica-capacitors-are-characterised-by-all-of-the-following-except/#more-45818">Detailed SolutionMica capacitors are characterised by all of the following except

43. In a cable capacitor, voltage gradient is maximum at the surface of the

earth
conduction
sheath
insulator

Detailed

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SolutionIn a cable capacitor, voltage gradient is maximum at the surface of the

44. The unit of capacitance is

henry
ohm
farad
farad/m

Detailed

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SolutionThe unit of capacitance is

45. 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.

37, initial
62, initial
62, final
37, final

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. . . value." class="read-more button" href="https://exam.pscnotes.com/mcq/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/#more-45105">Detailed SolutionThe time constant of an R-C
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circuit is defined as the time during which capacitor charging voltage actually rises to . . . . . . . . percent of its . . . . . . . . value.

46. An electrolytic capacitor is generally made to provide

low capacitance
fixed capacitance
variable capacitance
large value of capacitance

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href="https://exam.pscnotes.com/mcq/an-electrolytic-capacitor-is-generally-made-to-provide/#more-44789">Detailed SolutionAn electrolytic capacitor is generally made to provide

47. Which of the following capacitors preferred for high frequency circuits ?

Air capacitor
Electrolytic capacitor
Mica capacitor
none of the above

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high frequency circuits ?" class="read-more button" href="https://exam.pscnotes.com/mcq/which-of-the-following-capacitors-preferred-for-high-frequency-circuits/#more-44666">Detailed SolutionWhich of the following capacitors preferred for high frequency circuits ?

48. If three 15 uF capacitors are connected in series, the net capacitance is

5 uF
30 uF
45 uF
50 uF

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xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"> Subscribe on YouTube href="https://exam.pscnotes.com/mcq/if-three-15-uf-capacitors-are-connected-in-series-the-net-capacitance-is/#more-44273">Detailed SolutionIf three 15 uF capacitors are connected in series, the net capacitance is

49. Out of the following capacitors of identical rating which one will have the smallest dimensions ?

Aluminium foil capacitor
Mica capacitor
Ceramic capacitor
Paper capacitor

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dimensions ?" class="read-more button" href="https://exam.pscnotes.com/mcq/out-of-the-following-capacitors-of-identical-rating-which-one-will-have-the-smallest-dimensions/#more-43959">Detailed SolutionOut of the following capacitors of identical rating which one will have the smallest dimensions ?

50. If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will

decrease
increase
remains unchanged
become zero

Detailed SolutionIf the sheet

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of a bakelite is inserted between the plates of an air capacitor, the capacitance will

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