Consider the following statements regarding freewheeling diode:
1. It provides path for inductive load current.
2. It reduces voltage spikes.
3. It improves efficiency.
4. It is used only in AC circuits.
Which of the statements are correct?
Answer & step-by-step solution
A freewheeling diode gives inductive current a path when the main source/switch is removed. It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits. Key relation: Inductor relation v=L di/dt explains the voltage spike if current path is interrupted.
Exam focus: Always provide a current path for stored inductive energy. Common trap: Freewheeling diodes are not limited to AC circuits.
Statement-wise Verification
- Statement 1 - Correct.
It provides path for inductive load current.
Always provide a current path for stored inductive energy. - Statement 2 - Correct.
It reduces voltage spikes.
Inductor relation v=L di/dt explains the voltage spike if current path is interrupted. - Statement 3 - Correct.
It improves efficiency.
It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits. - Statement 4 - Incorrect.
It is used only in AC circuits.
The correct principle is: It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits.
Core Concept
A freewheeling diode gives inductive current a path when the main source/switch is removed. It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits.
Formula / Key Relationship
Inductor relation v=L di/dt explains the voltage spike if current path is interrupted.
Why the Other Options Are Wrong
Option B is incorrect because it includes incorrect statement(s) 4 and omits correct statement(s) 2, 3. Option C is incorrect because it omits correct statement(s) 1. Option D is incorrect because it includes incorrect statement(s) 4.
Exam Shortcut / Approach
Always provide a current path for stored inductive energy.
Common Mistake
Freewheeling diodes are not limited to AC circuits.
Quick Revision
Inductive Current Freewheeling is linked with Freewheeling Diode, Choppers and Rectifiers and Power Electronics. Always provide a current path for stored inductive energy.
फ्रीव्हीलिंग डायोड के संबंध में निम्नलिखित कथनों पर विचार कीजिए:
1. यह प्रेरणिक लोड धारा के लिए पथ देता है।
2. यह वोल्टेज स्पाइक कम करता है।
3. यह दक्षता सुधारता है।
4. यह केवल AC परिपथों में उपयोग होता है।
कौन-से कथन सही हैं?
उत्तर और चरणबद्ध हल
A — केवल 1, 2 और 3। स्विच बंद होने पर फ्रीव्हीलिंग डायोड प्रेरणिक धारा को पथ देता है, v = L·di/dt से बनने वाले बड़े वोल्टेज स्पाइक को क्लैम्प करता है और धारा निरंतर रखकर दक्षता सुधारता है। यह DC कन्वर्टर/रेक्टिफायर में भी उपयोग होता है।
विस्तृत हल (मूल भाषा में)
Statement-wise Verification
- Statement 1 - Correct.
It provides path for inductive load current.
Always provide a current path for stored inductive energy. - Statement 2 - Correct.
It reduces voltage spikes.
Inductor relation v=L di/dt explains the voltage spike if current path is interrupted. - Statement 3 - Correct.
It improves efficiency.
It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits. - Statement 4 - Incorrect.
It is used only in AC circuits.
The correct principle is: It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits.
Core Concept
A freewheeling diode gives inductive current a path when the main source/switch is removed. It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits.
Formula / Key Relationship
Inductor relation v=L di/dt explains the voltage spike if current path is interrupted.
Why the Other Options Are Wrong
Option B is incorrect because it includes incorrect statement(s) 4 and omits correct statement(s) 2, 3. Option C is incorrect because it omits correct statement(s) 1. Option D is incorrect because it includes incorrect statement(s) 4.
Exam Shortcut / Approach
Always provide a current path for stored inductive energy.
Common Mistake
Freewheeling diodes are not limited to AC circuits.
Quick Revision
Inductive Current Freewheeling is linked with Freewheeling Diode, Choppers and Rectifiers and Power Electronics. Always provide a current path for stored inductive energy.
ફ્રીવ્હીલિંગ ડાયોડ અંગે નીચેનાં વિધાનો ધ્યાનમાં લો:
1. તે પ્રેરક લોડ પ્રવાહ માટે માર્ગ આપે છે.
2. તે વોલ્ટેજ સ્પાઇક ઘટાડે છે.
3. તે કાર્યક્ષમતા સુધારે છે.
4. તે ફક્ત AC પરિપથોમાં જ વપરાય છે.
કયાં વિધાનો સાચાં છે?
જવાબ અને પગલાવાર ઉકેલ
A — ફક્ત 1, 2 અને 3. સ્વિચ બંધ થાય ત્યારે ફ્રીવ્હીલિંગ ડાયોડ પ્રેરક પ્રવાહને માર્ગ આપે છે, v = L·di/dt થી બનતા મોટા વોલ્ટેજ સ્પાઇકને ક્લેમ્પ કરે છે અને પ્રવાહ સતત રાખીને કાર્યક્ષમતા સુધારે છે. તે DC કન્વર્ટર/રેક્ટિફાયરમાં પણ વપરાય છે.
વિગતવાર ઉકેલ (મૂળ ભાષામાં)
Statement-wise Verification
- Statement 1 - Correct.
It provides path for inductive load current.
Always provide a current path for stored inductive energy. - Statement 2 - Correct.
It reduces voltage spikes.
Inductor relation v=L di/dt explains the voltage spike if current path is interrupted. - Statement 3 - Correct.
It improves efficiency.
It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits. - Statement 4 - Incorrect.
It is used only in AC circuits.
The correct principle is: It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits.
Core Concept
A freewheeling diode gives inductive current a path when the main source/switch is removed. It clamps otherwise large inductive overvoltage, keeps current continuous and can improve efficiency and waveform quality in DC converter/rectifier circuits.
Formula / Key Relationship
Inductor relation v=L di/dt explains the voltage spike if current path is interrupted.
Why the Other Options Are Wrong
Option B is incorrect because it includes incorrect statement(s) 4 and omits correct statement(s) 2, 3. Option C is incorrect because it omits correct statement(s) 1. Option D is incorrect because it includes incorrect statement(s) 4.
Exam Shortcut / Approach
Always provide a current path for stored inductive energy.
Common Mistake
Freewheeling diodes are not limited to AC circuits.
Quick Revision
Inductive Current Freewheeling is linked with Freewheeling Diode, Choppers and Rectifiers and Power Electronics. Always provide a current path for stored inductive energy.
More Rectifiers & Converters questions