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• CBSE×
• Class 12 Science×
• Physics×
• 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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## <div>an alternating potential V=Vo sin<img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=52c3f6b2894ffec375aa7a7ec8cd9673.png" alt="omega" align="middle" />t is applied across a circuit .as a result the current I=Io sin(<img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=52c3f6b2894ffec375aa7a7ec8cd9673.png" alt="omega" align="middle" />t-<img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=6dae009a0e3a5eec27fc1b747bab3923.png" alt="straight pi" align="middle" />/2) flow in it.the power consumed in the circuit per cycle is?(ans.zero)<img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=dd9f5eddb46326ec5956f101b0499126.png" alt="blank subscript blank" align="middle" /><img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=dd9f5eddb46326ec5956f101b0499126.png" alt="blank subscript blank" align="middle" /></div>

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