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Second Year Physics Alternating Current


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Class 9Class 10First YearSecond Year
16.7Findthevalueofthecurrentflowingthroughacapacitance0.5μFwhenconnectedtoasourceof150 Vat50 Hz.(Ans:Ims=0.024 A) 16.7 Find the value of the current flowing through a capacitance 0.5 \mu \mathrm{F} when connected to a source of 150 \mathrm{~V} at 50 \mathrm{~Hz} .(Ans: I_{m s}=0.024 \mathrm{~A} )

16.2 A sinusoidal A.C. has a maximum value of 15 \mathrm{~A} . What are its rms values? If the time is recorded from the instant the current is zero and is becoming positive what is the instantaneous value of the current after 1 / 300 \mathrm{~s} given the frequency is 50 \mathrm{~Hz} .(Ans: I_{\text {ma }}=10.6 \mathrm{~A} Instantaneous current =13.0 \mathrm{~A} )
16.2 A sinusoidal A.C. has a maximum value of  15 \mathrm{~A} . What are its rms values? If the time is recorded from the instant the current is zero and is becoming positive what is the instantaneous value of the current after  1 / 300 \mathrm{~s}  given the frequency is  50 \mathrm{~Hz} .(Ans:  I_{\text {ma }}=10.6 \mathrm{~A}  Instantaneous current  =13.0 \mathrm{~A}  )

16.2AsinusoidalA.C.hasamaximumvalueof15 A.Whatareitsrmsvalues?Ifthetimeisrecordedfromtheinstantthecurrentiszeroandisbecomingpositivewhatistheinstantaneousvalueofthecurrentafter1/300 sgiventhefrequencyis50 Hz.(Ans:Ima =10.6 AInstantaneouscurrent=13.0 A)16.2 A sinusoidal A.C. has a maximum value of 15 \mathrm{~A} . What are its rms values? If the time is recorded from the instant the current is zero and is becoming positive what is the instantaneous value of the current after 1 / 300 \mathrm{~s} given the frequency is 50 \mathrm{~Hz} .(Ans: I_{\text {ma }}=10.6 \mathrm{~A} Instantaneous current =13.0 \mathrm{~A} )

16.7 Find the value of the current flowing through a capacitance 0.5 \mu \mathrm{F} when connected to a source of 150 \mathrm{~V} at 50 \mathrm{~Hz} .(Ans: I_{m s}=0.024 \mathrm{~A} )
 16.7  Find the value of the current flowing through a capacitance  0.5 \mu \mathrm{F}  when connected to a source of  150 \mathrm{~V}  at  50 \mathrm{~Hz} .(Ans:  I_{m s}=0.024 \mathrm{~A}  )
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16.7Findthevalueofthecurrentflowingthroughacapacitance0.5μFwhenconnectedtoasourceof150 Vat50 Hz.(Ans:Ims=0.024 A) 16.7 Find the value of the current flowing through a capacitance 0.5 \mu \mathrm{F} when connected to a source of 150 \mathrm{~V} at 50 \mathrm{~Hz} .(Ans: I_{m s}=0.024 \mathrm{~A} )

16.5 How does doubling the frequency affect the reactance of (b) a capacitor?
 16.5 How does doubling the frequency affect the reactance of (b) a capacitor?

16.5Howdoesdoublingthefrequencyaffectthereactanceof(b)acapacitor? 16.5 How does doubling the frequency affect the reactance of (b) a capacitor?

16.3 How many times per second will an incandescent lamp reach maximum brilliance when connected to a 50 \mathrm{~Hz} source?
 16.3 How many times per second will an incandescent lamp reach maximum brilliance when connected to a  50 \mathrm{~Hz}  source?

16.3Howmanytimespersecondwillanincandescentlampreachmaximumbrilliancewhenconnectedtoa50 Hzsource? 16.3 How many times per second will an incandescent lamp reach maximum brilliance when connected to a 50 \mathrm{~Hz} source?

16.6 A 10 \mathrm{mH} 20 \Omega coil is connected across 240 \mathrm{~V} and 180 / \pi \mathrm{Hz} source. How much power does it dissipate?(Ans: 2778W)
 16.6  A  10 \mathrm{mH} 20 \Omega  coil is connected across  240 \mathrm{~V}  and  180 / \pi \mathrm{Hz}  source. How much power does it dissipate?(Ans: 2778W)

16.6A10mH20Ωcoilisconnectedacross240 Vand180/πHzsource.Howmuchpowerdoesitdissipate?(Ans:2778W) 16.6 A 10 \mathrm{mH} 20 \Omega coil is connected across 240 \mathrm{~V} and 180 / \pi \mathrm{Hz} source. How much power does it dissipate?(Ans: 2778W)

16.2 Name the device that will (a) permit flow of direct current but oppose the flow of alternating current
 16.2 Name the device that will (a) permit flow of direct current but oppose the flow of alternating current

16.2Namethedevicethatwill(a)permitflowofdirectcurrentbutopposetheflowofalternatingcurrent 16.2 Name the device that will (a) permit flow of direct current but oppose the flow of alternating current

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