Question 21 : Which, among the following is the right expression for converting from delta to star?
1. R1=Ra*Rb/(Ra+Rb+Rc), R2=Rb*Rc/(Ra+Rb+Rc), R3=Rc*Ra/(Ra+Rb+Rc)
2. R1=Ra/(Ra+Rb+R
3. , R2=Rb/(Ra+Rb+Rc), Rc=/(Ra+Rb+Rc)c) R1=Ra*Rb*Rc/(Ra+Rb+Rc), R2=Ra*Rb/(Ra+Rb+Rc), R3=Ra/(Ra+Rb+Rc)
4. R1=Ra*Rb*Rc/(Ra+Rb+Rc), R2=Ra*Rb*Rc/(Ra+Rb+Rc), R3=Ra*Rb*Rc/(Ra+Rb+Rc)
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Question 22 : If there are 3 10V sources connected in parallel then on source transformation__________
1. The effect of all the sources is considered
2. The effect of only one source is considered
3. The effect of none of the sources is considered
4. The effect of only 2 sources is considered.
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Question 23 : In source transformation________
1. Voltage source remains the same
2. Current sources remain the same
3. Both voltage and current source remain the same
4. Resistances remain the same
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Question 24 : A source transformation is_________
1. Unilateral
2. Bilateral
3. Unique
4. Cannot be determined
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Question 25 : Norton resistance is found by?
1. Shorting all voltage sources
2. Opening all current sources
3. Shorting all voltage sources and opening all current sources
4. Opening all voltage sources and shorting all current sources
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Question 26 : The Norton current is the_______
1. Short circuit current
2. Open circuit current
3. Open circuit and short circuit current
4. Neither open circuit nor short circuit current
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Question 27 : Thevenin resistance is found by ________
1. Shorting all voltage sources
2. Opening all current sources
3. Shorting all voltage sources and opening all current sources
4. Opening all voltage sources and shorting all current sources
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Question 28 : The Thevenin voltage is the__________
1. Open circuit voltage
2. Short circuit voltage
3. Open circuit and short circuit voltage
4. Neither open circuit nor short circuit voltage
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Question 29 : Superposition theorem does not work for ________
1. Current
2. Voltage
3. Power
4. Works for all: current, voltage and power
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Question 30 : Superposition theorem is valid for _________
1. Linear systems
2. Non-linear systems
3. Both linear and non-linear systems
4. Neither linear nor non-linear systems
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