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The general equation for the instantneou...

The general equation for the instantneous voltage of a 50 Hz generator with peak voltage 220 V is

A

`220sin50pit`

B

`220sin100pit`

C

`pm220sin100pit`

D

`220sin25pit`

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The correct Answer is:
B
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In any ac circuit, is the applied instanteneous voltage equal to the algebraic sum of the instantneous voltages across the series elements of the circuit?Is the same true for rms value?

What is the peak value of the voltage of a 220V ac line?

By what factor would the output voltage of an ac generator change, if the number of turns in its coil is doubled?

Transformer is a device used to increase or decrease the voltage in the transmission line according to requirement, Generally the input line voltage is fed in a primary coil and the output line voltage is obtained from the terminals of another coil In an ideal transformer, the primary and secondary coils are linked is such a way that there is no loss of magnetic flux and electrical energy. In an ideal transformer, if the number of turns and input voltage across the terminals of the primary coils be N_1 and V_1 , then the output voltage at the two terminals of the secondary coil V_2=V_1.N_2/N_1 , where N_2 is the number of turns in the secondary coil . In question (i) if the input power of the transformer be 44 W, then output power is

Transformer is a device used to increase or decrease the voltage in the transmission line according to requirement, Generally the input line voltage is fed in a primary coil and the output line voltage is obtained from the terminals of another coil In an ideal transformer, the primary and secondary coils are linked is such a way that there is no loss of magnetic flux and electrical energy. In an ideal transformer, if the number of turns and input voltage across the terminals of the primary coils be N_1 and V_1 , then the output voltage at the two terminals of the secondary coil V_2=V_1.N_2/N_1 , where N_2 is the number of turns in the secondary coil . In the above mentioned transformer the input and output currents are respectively.

Transformer is a device used to increase or decrease the voltage in the transmission line according to requirement, Generally the input line voltage is fed in a primary coil and the output line voltage is obtained from the terminals of another coil In an ideal transformer, the primary and secondary coils are linked is such a way that there is no loss of magnetic flux and electrical energy. In an ideal transformer, if the number of turns and input voltage across the terminals of the primary coils be N_1 and V_1 , then the output voltage at the two terminals of the secondary coil V_2=V_1.N_2/N_1 , where N_2 is the number of turns in the secondary coil . The ratio of number of turns of the primary and secondary coils of an ideal transformer is 2:1 IF the input voltage is 440 V, then output voltage is if the input power of the transformer be 44 W, then output power is In the above mentioned transformer the input and output currents are respectively.

The number of turns in primary and secondary coil of a transformer is 100 and1000. If the input voltage is (500V, 50Hz) then the output voltage will be:

CHHAYA PUBLICATION-ALTERNATING CURRENT -EXERCISE (Multiple Choice Question)
  1. An alternating current is given by the equation I=i1sinomegatcosomegat...

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  2. An ac having a peak value 1.41 A is used to heat a wire. A dc producin...

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  3. The general equation for the instantneous voltage of a 50 Hz generator...

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  4. The relation between angular velocity (omega) and driving frequency(f)...

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  5. Form factor of an alternating voltage is the ratio of

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  6. The value of an ac voltage at time 0letle(pi)/omega is given by V=V0si...

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  7. The rms value of potential difference V shown in the Fig.2.42 is

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  8. The rms value and frequency of an ac current are 5A and 50 Hz respecti...

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  9. In an ac circuit containing capacitance , only the current

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  10. In an LR circuit , the phase angle between alternating voltage and alt...

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  11. In an LCR series circuit, the capacitance is reduced to one-fourth, wh...

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  12. The phase difference between V and I of an LCR circuit in series reson...

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  13. The reactance of an inductor of inductance 1/piH at frequency 50 Hz is

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  14. Which quantity in an ac circuit is not dependent on frequency?

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  15. The condition of getting maximum current in an LCR series circuit is

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  16. The series resonant frequency of an LCR circuit is f. IF the capacitan...

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  17. A coil has resistance 30 Omega and inductive reactance 20 Omega at 50 ...

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  18. A fully charged capacitor C with initial charge q0 is connected to a ...

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  19. A voltage V0sinomegat is applied across a series combination of resist...

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  20. When an ideal choke is connected to an ac source of 100V and 50Hz, a c...

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