Basic Electrical Mcqs


Q.  Inductor does not allow the sudden change of

a. current
b. voltage
c. power
d. None of the above


ANSWER: See Answer
 
Voltage developed across an inductor is expressed bY
Sudden change of current means di will change at dt → 0 (dt tends to zero), so sudden change of current means infinite voltage. Therefore it is not possible.
MCQs:  The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?
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MCQs:  Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 25 Q. If the same four wires are connected is series the effective resistance will be________?
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MCQs:  A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is_____________?
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MCQs:  Current velocity through a copper conductor is___________?
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MCQs:  Which of the following material has nearly zero temperature co-efficient of resistance_________?
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MCQs:  You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect__________?
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MCQs:  Two resistors are said to be connected in series when___________?
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MCQs:  Which of the following statement is true both for a series and a parallel D. C. circuit?
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MCQs:  Which of the following materials has a negative temperature co-efficient of resistance?
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MCQs:  Ohm’s law is not applicable to____________?
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MCQs:  Which is the best conductor of electricity _______________?
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MCQs:  For which of the following ‘ampere second’ could be the unit ?
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MCQs:  All of the following are equivalent to watt except_____________?
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MCQs:  A resistance having rating 10 ohms, 10 W is likely to be a__________?
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MCQs:  Which one of the following does not have negative temperature co-efficient ____________?
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MCQs:  Varistors are______________?
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MCQs:  Insulating materials have the function of______________?
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MCQs:  Insulating materials have the function of___________?
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MCQs:  The rating of a fuse wire is always expressed in________________?
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MCQs:  The minimum charge on an ion is______________?
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