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Write the principle of transformer....

Write the principle of transformer.

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Transformation ratio of one transformer is 1:2. If Leclanche cell having emf 1.5 V is connected to primary coil of a transformer then voltage obtained across its secondary is ………..

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KUMAR PRAKASHAN-ALTERNATING CURRENTS -SECTION-D MCQs (COMPETITIVE EXAMS)
  1. Write the principle of transformer.

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  2. Power factor of AC series circuit having resistance R and inductor L h...

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  3. A transformer has 140 turns in the primary and 280 turns in the second...

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  4. In an oscillating L-C circuit the maximum charge on the capacitor is Q...

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  5. Alternating current can not be measured by D.C. ammeter because ………

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  6. In a L-C-R circuit capacitance is changed from C to 2C. For the resona...

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  7. In a L-C-R series A.C. circuit, the voltage across each of the compone...

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  8. The power factor of A.C. circuit of resistance 12Omega and impedance ...

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  9. The phase difference between the alternating current and emf is pi/2 r...

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  10. In L-C-R series circuit at resonance p.d. between two ends of resistor...

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  11. In an A.C. generator, a coil with N turns, all the same area A and tot...

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  12. In A.C. circuit, when E = E0 sin omegat supply applied, current is obt...

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  13. An inductor (L = 0.03 H) and a resistor (R = 0.15 kOmega) are connecte...

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  14. An LCR circuit is equivalent to a damped pendulum. In an LCR circuit t...

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  15. An arc lamp requires a direct current of 10 A at 80 V to function. If ...

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  16. For an RLC circuit driven with voltage of amplitude vm and frequency ...

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  17. An emf of 20 V is applied at time t = 0 to a circuit containing in ser...

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  18. An inductor of inductance L and resistance R is connected of A.C. circ...

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  19. In an A.C circuit the current...

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  20. A primary of transformer has 100 turns an secondary has 500 turns. If ...

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  21. If in an A.C. circuit voltage V and current is then the power dissipat...

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