Q. A dc machine has 6 poles all connected in series. Each pole has 9 H inductance and field current is 2 A. Total inductance and total energy stored are

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Q. In the Bode plot, of H(s) = 1 + s/20, the phase at w = 15 is

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Q. The inductance of an air cored coil is 2 H. The number of turns is made 3 times, all other quantities remaining the same. The new value of inductance will be 2 2

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Q. Tellegen's theorem is applicable to

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Q. Which of the statement is correct?

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Q. Which synthesis procedure requires the use of mutual inductance?

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Q. A series RL circuit is excited by a voltage v(t) = Vm sin (ωt + Φ). The transient current will be zero if

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Q. The electrolyte in a dry cell is completely dry.

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Q. A series RLC circuit has a resonant frequency of 2000 Hz. The maximum voltage across C is likely to occur at a frequency of about

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Q. Assertion (A): Thevenin's theorem and Norton's theorem are dual of each other.

Reason (R): Voltage source can be converted into current source and vice versa.

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Q. A coil has a resistance of 2 Ω and inductance of 0.1 mH. The applied voltages is suddenly increased from 10 V to 20 V. After steady state condition have reached, the current is

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Q. In a series RLC circuit the dB level of currents at half power frequencies as compared to current at resonance is

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Q. If A = 10 + j then logeA is

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Q. A loudspeaker transformer has a turns ratio of 20 : 1. The speaker impedance is 20Ω. Primary impedance of transformer is

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Q. A series RLC circuit has a resonance frequency of 1 kHz and a quality factor Q = 100. If each of R, L and C is doubled from its original value, the new Q of the circuit is

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Q. Assertion (A): The polynomial s³ + 6s² + 12s + 8 is Hurwitz.

Reason (R): In a Hurwitz polynomial all coefficients are non-negative.

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Q. A dc network has an open circuit voltage of 5 V. When its terminals are short circuited a current of 5 A flows through the short circuit. If the short circuit is removed and a resistance of 1.5 Ω is connected across its terminals, the current will be

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Q. A coil of resistance R and inductance L has a capacitor C in parallel with it. The source frequency is adjusted to a value equal to resonant frequency. Another capacitor C is added in parallel with the above circuit, the source current will

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Q. Discharge breakdown in insulators is due to voids.

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Q. If a coil has diameter 'd' number of turns 'N' and form factor 'F' then the inductance of coil is proportional to

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