A DC generator can supply 230V, 200A current. If the generator's efficiency is 86%, how many horsepower of motor will be required to turn the generator? (একটি ডিসি জেনারেটর 230V, 200A কারেন্ট সরবরাহ করতে পারে। যদি জেনারেটর এর কার্যক্ষমতা 86% হয়, তবে জেনারেটরকে ঘুরাতে কত HP শক্তির মোটর প্রয়োজন হবে?)

Bangladesh Water Development Board (BWDB) - Sub-Assistant Engineer (Electrical) (19-08-2023) ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)

Created: 3 months ago | Updated: 3 months ago

Updated: 3 months ago

Ans :

জেনারেটরের আউটপুট = 230 $\times$ 200 = 46000 watt

জেনারেটরের ইনপুট = আউটপুট / দক্ষতা = $\frac{46000}{0.86}$ =53488.37 watt

= $\frac{53488.37}{746}$ = 71.70 BHP (Ans)

3 months ago

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Question:
A DC generator can supply 230V, 200A current. If the generator's efficiency is 86%, how many horsepower of motor will be required to turn the generator? (একটি ডিসি জেনারেটর 230V, 200A কারেন্ট সরবরাহ করতে পারে। যদি জেনারেটর এর কার্যক্ষমতা 86% হয়, তবে জেনারেটরকে ঘুরাতে কত HP শক্তির মোটর প্রয়োজন হবে?)

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Find currents I and I₁ in the following circuit.

Created: 2 years ago | Updated: 8 months ago

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৪৫ তম বিসিএস লিখিত ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)

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Determine the Thevenin's equivalent circuit at terminal X-Y of the following circuit.

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৪৫ তম বিসিএস লিখিত ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)

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3 State maximum power transfer theorem.

Created: 2 years ago | Updated: 8 months ago

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Maximum Power Transfer Theorem :

In electrical engineering, the maximum power transfer theorem states that, to obtain maximum external power from a power source with internal resistance, the resistance of the load must equal the resistance of the source as viewed from its output terminals.

৪৫ তম বিসিএস লিখিত ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)

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If the switch in the following circuit opens at t = 0, find v(t) for t≥ 0 and the initial energy stored in the capacitor.

Created: 2 years ago | Updated: 8 months ago

Updated: 8 months ago

For t<0, the switch is closed.

Capacitor acts as open to DC.

Voltage across the capacitor,

v(0^-)= {(12||4)×V}÷{(12||4)+6} = 8VFor t=0, the switch is opened,Voltage across the Capacitor cannot change instantaneously,So, v(0^-)= v(0) = 8VAt t>0, The capacitor is discharging.R_th= (12||4) = 3 ohmC= 1/6 FTime constant, Π = R_th×C = 0.5 So, v(t) = v(0)e^-t/Π = 8e^-t/0.5=8e^-2tV (Ans.)

৪৫ তম বিসিএস লিখিত ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)

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Show that a series RL circuit is a low pass filter if the output is taken across the resistor. Calculate the cut-off frequency (f_c) if L = 2 mH and R = 10 kΩ.

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৪৫ তম বিসিএস লিখিত ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)

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Compute the average and effective values of the square voltage wave shown in the following figure.

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ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)

Related Question

1
Find currents I and I₁ in the following circuit.

2
Determine the Thevenin's equivalent circuit at terminal X-Y of the following circuit.

3 State maximum power transfer theorem.

Maximum Power Transfer Theorem :

4
If the switch in the following circuit opens at t = 0, find v(t) for t≥ 0 and the initial energy stored in the capacitor.

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Show that a series RL circuit is a low pass filter if the output is taken across the resistor. Calculate the cut-off frequency (f_c) if L = 2 mH and R = 10 kΩ.

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ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)

Related Question

1 Find currents I and I1 in the following circuit.

2 Determine the Thevenin's equivalent circuit at terminal X-Y of the following circuit.

3 State maximum power transfer theorem.

Maximum Power Transfer Theorem :

4 If the switch in the following circuit opens at t = 0, find v(t) for t≥ 0 and the initial energy stored in the capacitor.

5 Show that a series RL circuit is a low pass filter if the output is taken across the resistor. Calculate the cut-off frequency (fc) if L = 2 mH and R = 10 kΩ.

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Related Question

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Hi, আমি SATT AI!

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Find currents I and I₁ in the following circuit.

2
Determine the Thevenin's equivalent circuit at terminal X-Y of the following circuit.

4
If the switch in the following circuit opens at t = 0, find v(t) for t≥ 0 and the initial energy stored in the capacitor.

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Show that a series RL circuit is a low pass filter if the output is taken across the resistor. Calculate the cut-off frequency (f_c) if L = 2 mH and R = 10 kΩ.

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