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• CBSE×
• Class 12 Science×
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• Alternating Current×
• Power In Ac Circuit×

Power In Ac Circuit Free Doubts and Solutions

What are the imp. conceptual questions from the chapter Alternating Current & EMI? Is power factor at resonance is zero. How?

Asked by debjyotisaha98 19th August 2015, 10:23 PM

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Given below are two electric circuits A and B Calculate the ratio of power factor of the circuit B to the power factor of circuit A.

Asked by Topperlearning User 22nd June 2015, 12:46 PM

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Define the term 'wattless current'.

Asked by Topperlearning User 22nd June 2015, 12:29 PM

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Prove that an ideal capacitor in an a.c. circuit does not dissipate power.

Asked by Topperlearning User 22nd June 2015, 11:25 AM

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Define power factor. State the conditions under which it is (i) maximum and (ii) minimum.

Asked by Topperlearning User 22nd June 2015, 11:22 AM

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State the factors on which the power factor depends?

Asked by Topperlearning User 22nd June 2015, 11:07 AM

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In a circuit a 75 Ω resistance and 1 H coil have peak voltage of 3 V 50 Hz frequency. Calculate the current and the power.

Asked by Topperlearning User 22nd June 2015, 11:06 AM

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In an ac circuit where is power dissipated?

Asked by Topperlearning User 22nd June 2015, 11:04 AM

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Prove that, a pure inductive circuit does not consume any power in a complete cycle.

Asked by Topperlearning User 22nd June 2015, 11:03 AM

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A 100 Ω iron is connected to a 200 V supply with 50 Hz frequency. Find the rms value of current and the net power consumed over full cycle.

Asked by Topperlearning User 22nd June 2015, 11:02 AM

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How can the power factor be improved by using capacitance of appropriate value?

Asked by Topperlearning User 22nd June 2015, 11:01 AM

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Is it possible to obtain wattless current in a circuit?

Asked by Topperlearning User 22nd June 2015, 10:59 AM

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On what factors does power in an ac circuit depend?

Asked by Topperlearning User 22nd June 2015, 10:58 AM

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The voltage and current in an ac circuit is given by What is the power dissipated?

Asked by Topperlearning User 22nd June 2015, 10:57 AM

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What will be the phase difference between the voltage and the current given power factor of an ac circuit is 0.5?

Asked by Topperlearning User 22nd June 2015, 10:57 AM

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an alternating potential V=Vo sin t is applied across a circuit .as a result the current I=Io sin( t- /2) flow in it.the power consumed in the circuit per cycle is?(ans.zero)  Asked by Nidhi 30th December 2014, 11:54 PM

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The Dielectric strength of air is 3*106 V /m. A parallel plate capacitor has area 20cm2 and plate separation of 0.1mm. Find the maximum rms voltage of an A/C source which can be safely connected to this capacitor.

Asked by Malavika Umesh 29th September 2014, 8:49 PM

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Define the term 'wattles current'.

Asked by Topperlearning User 4th June 2014, 1:23 PM