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Electronics And Communication Engineering

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

Electronics And Communication Engineering, Networks Analysis And Synthesis /
Question: 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
[A].

9 H and 18 J

[B].

18 H and 36 J

[C].

54 H and 108 J

[D].

108 H and 216 J

Answer: Option C

Explanation:

Total L = 6 x 9 = 54 H.

Energy = x 54 x 22 = 108 J.

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 Read More »

Electronics And Communication Engineering, Networks Analysis And Synthesis

A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH

Digital Electronics, Electronics And Communication Engineering /
Question: A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH
[A].

A = B = C = 0

[B].

A = B = C = 1

[C].

A = B = 1 and C = 0

[D].

A = C = 1 and B = 0

Answer: Option A

Explanation:

NOR gate gives High output when all inputs are Low.

A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH Read More »

Digital Electronics, Electronics And Communication Engineering

A series resonant circuit has R = 2 Ω, L = 0.1 H and C =10 μF. At resonance applied voltage = 10 ∠0 V. Voltage across inductance is likely to be

Electronics And Communication Engineering, Networks Analysis And Synthesis /
Question: A series resonant circuit has R = 2 Ω, L = 0.1 H and C =10 μF. At resonance applied voltage = 10 ∠0 V. Voltage across inductance is likely to be
[A].

10 ∠0 V

[B].

10 ∠45° V

[C].

100 ∠90° V

[D].

100 ∠-90° V

Answer: Option C

Explanation:

Voltage across inductance = QV and leads the applied voltage.

A series resonant circuit has R = 2 Ω, L = 0.1 H and C =10 μF. At resonance applied voltage = 10 ∠0 V. Voltage across inductance is likely to be Read More »

Electronics And Communication Engineering, Networks Analysis And Synthesis

A two branch parallel tuned circuits has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. The bandwidth is 200 radians/sec. A load of resistance RL is connected in parallel. The new bandwidth will be

Electronics And Communication Engineering, Networks Analysis And Synthesis /
Question: A two branch parallel tuned circuits has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. The bandwidth is 200 radians/sec. A load of resistance RL is connected in parallel. The new bandwidth will be
[A].

200 rad/sec

[B].

more than 200 rad/sec

[C].

less than 200 rad/sec

[D].

200 rad/sec or less

Answer: Option B

Explanation:

Loading increases bandwidth of parallel tuned circuii.

A two branch parallel tuned circuits has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. The bandwidth is 200 radians/sec. A load of resistance RL is connected in parallel. The new bandwidth will be Read More »

Electronics And Communication Engineering, Networks Analysis And Synthesis