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BASIC ELECTRICAL ENGINEERING By Manaswi QUESTION 1 The unit of inductance, henry is represented by: a) V/A b) V sec/A c) V s d) V/sec QUESTION 2 The energy stored in an inductor of inductance L henry is represented by: a) iL b) iL^2 c) (L^2)/i d) ½ Li^2 QUESTION 3 The two laws that form the basis of circuit analysis were enunciated by: a) Faraday b) Ohm c) Bohr d) Kirchoff QUESTION 4 Equation obtained by applying kirchoff’s law to a circuit study in transient behaviour are: a) Linear Algebraic b) Non-Linear Algebraic c) Differential d) None of these QUESTION 5 When delta connected network with all its branches having an equal resistance is converted in to an equivalent star connected network , the magnitude of the resistance of each branch is: a) Equal to the branch resistance in delta b) Greater than the branch resistance in delta c) Less than the branch resistance in delta d) None of these QUESTION 6 Star-Delta transformation is employed to simplify circuit elements connected in a) Series b) Parallel c) Series, Parallel d) None of these QUESTION 7 When resistances are connected in series, the voltage across all the resistances is: a) Equal b) Non equal c)Proportional to the square of the current d) None of these QUESTION 8 What is the equivalent inductance of two inductive coils of 5H and 10H connected in series? a) 15H b) 3/10 H c) 1/15 H d) 10/3 H QUESTION 9 Three capacitors each of c microfarad are first connected in series and then in parallel. The equivalent capacitance: a) Is greater in the series combination b) Is greater in the parallel combination c) Is same in the two combinations d) None of these QUESTION 10 When a number of inductances are connected in series, the equivalent inductance of the circuit is: a) The direct sum of the individual inductances b) Sum of the reciprocal of the individual inductances c) The reciprocal of the direct sum of the individual inductances d) The product of the individual inductances. QUESTION 11 Mathematically kirchoff’s current law can be expressed as QUESTION 12 When resistances are connected in parallel, the voltage across the resistors is QUESTION 13 The formula transformation is for star-delta QUESTION 14 The voltage across the parallel elements is obtained as QUESTION 15 Delta- Connected represented as: resistance can be QUESTION 16 Given What is the value of I? QUESTION 17 A device that can store energy in the form of a charge separation is QUESTION 18 According to the current division rule, the formula in parallel series is QUESTION 19 Current rise in an R and L series circuit with dc supply QUESTION 20 The formula of transformation for Ra delta star