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In a series D.C. circuit has core of a r...

In a series D.C. circuit has core of a reactance of `8Omega` and a resistance of `6Omega`. The effective resistance of the circuit will be …..

A

`24/7Omega`

B

`6Omega`

C

`8Omega`

D

`14 Omega`

Text Solution

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The correct Answer is:
B
The reactance of a coil in a D.C. circuit is zero.
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KUMAR PRAKASHAN-ALTERNATING CURRENTS -SECTION-D MCQs (DARPAN BASED ON TEXTBOOK)
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  2. A coil having inductance of 1 mH is connected to an A.C. source, its i...

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  3. In a series D.C. circuit has core of a reactance of 8Omega and a resis...

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  4. In an A.C. circuit of frequency 400/pi Hz is of capacitance CmuF and r...

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  5. In an L-C-R circuit , R=sqrt7Omega, XL=11Omega and XC=8Omega , then th...

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  6. A coil of self inductance of 1H and resistance 200Omega is connected t...

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  7. The maximum value of an A.C. voltage coming in our houses is ………. % mo...

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  8. The ratio of r.m.s. value of an A.C. voltage and its mean value over h...

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  9. An alternating voltage V = 400 sin (500omegat)V is connected to a 0.2 ...

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  10. In an A.C. circuit, resistance = 12Omega and capacitance reactance = 9...

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  11. I"rms"= Im

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  12. Usually in A.C. circuit ……..

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  13. The force constant of a spring corresponds to …….. in electrical circu...

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  14. A pure capacitor of capacitive reactance of 10Omega is connected to an...

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  15. An L-C-R series circuit with inductor of reactance is 25 Omega, reacta...

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  16. If 1.5 A constant current is passing through a resistance, then the va...

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  17. An L-C-R series A.C. circuit is tuned to resonance. The impedance of t...

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  18. In an L-C-R circuit, L = 8H, C = 0.5muF, R = 100Omega connected in ser...

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  19. In a L-C oscillator circuit at any instant of time current is I and ch...

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  20. …….. does not change with time for D.C. current and D.C. voltage.

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