Electrical Machines Questions and Answers_pag400

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c)​ 
d)​ 
View Answer 
Answer: a 
Explanation: When referred to primary, secondary inductance winding will be turns ratio 
squared. 
13. Consider a 10 KVA, 2000/200 V, single phase transformer having below following 
parameters: 
r1=10Ω, r2=0.1Ω, l1= 40mH, l2=0.4 mH, M = 10H. Then the expected primary self inductance 
will be 
a) 100.04H 
b) 99.06H 
c) 1.0004H 
d) 10.04H 
View Answer 
Answer: a 
Explanation: Primary self inductance = L1 = Lm1 + l1 
= (N1/N2)*M + l1 
 = 2000/200*10 + 0.04 
 =100.04 H. 
14. There is a 10 KVA, 2000/200 V, single phase transformer having below following 
parameters: 
r1=10Ω, r2=0.1Ω, l1= 40mH, l2=0.4 mH, M = 10H. Then the expected secondary self inductance 
will be 
a) 100.04H 
b) 99.06H 
c) 1.0004H 
d) 10.04H 
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