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Multiple choice questions: 1- A voltages of 50Hz transformer are 1500 V on primary and 600 V on the secondary. It has 1.5 V per turn. Then the number of turns on primary and secondary are ---------- a) 20 and 8 b) 100 and 10 c) 1000 and 120 d)1000 and 400 e) none of the previous. 2-A 600/200 V single phase transformer is supplying a load of 60 A at a p.f of 0.707 lag. The no load current is 3A at 0.2 P.f. lag. Then the primary current is ---- a) 63A b) 22.56A c) 69A d)24 e) 21.55 f) none of the previous. S 3- The silicon ratio in transformer iron cannot be increased greater than 5% because of- a) the iron loss will increase b) the hysteresis loss will increase c) the eddy current loss will increase d) none of the previous 4- If V1 = 400V and the wattmeter read 800W at no load test then the value of Ro is none of the previous a)100 b)4002 c) 200 d)160002 S

Multiple choice questions: 1- A voltages of 50Hz transformer are 1500 V on primary and 600 V on the secondary. It has 1.5 V per turn. Then the number of turns on primary and secondary are ---------- a) 20 and 8 b) 100 and 10 c) 1000 and 120 d)1000 and 400 e) none of the previous. 2-A 600/200 V single phase transformer is supplying a load of 60 A at a p.f of 0.707 lag. The no load current is 3A at 0.2 P.f. lag. Then the primary current is ---- a) 63A b) 22.56A c) 69A d)24 e) 21.55 f) none of the previous. S 3- The silicon ratio in transformer iron cannot be increased greater than 5% because of- a) the iron loss will increase b) the hysteresis loss will increase c) the eddy current loss will increase d) none of the previous 4- If V1 = 400V and the wattmeter read 800W at no load test then the value of Ro is none of the previous a)100 b)4002 c) 200 d)160002 S

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Multiple choice questions: 1- A voltages of 50Hz transformer are 1500 V on primary and 600 V on the secondary. It has 1.5 V per turn. Then the number of turns on primary and secondary are ---------- a) 20 and 8 b) 100 and 10 c) 1000 and 120 d)1000 and 400 e) none of the previous. 2-A 600/200 V single phase transformer is supplying a load of 60 A at a p.f of 0.707 lag. The no load current is 3A at 0.2 P.f. lag. Then the primary current is ---- a) 63A b) 22.56A c) 69A d)24 e) 21.55 f) none of the previous. S 3- The silicon ratio in transformer iron cannot be increased greater than 5% because of- a) the iron loss will increase b) the hysteresis loss will increase c) the eddy current loss will increase d) none of the previous 4- If V1 = 400V and the wattmeter read 800W at no load test then the value of Ro is none of the previous a)100 b)4002 c) 200 d)160002 S
Transcribed Image Text:Multiple choice questions: 1- A voltages of 50Hz transformer are 1500 V on primary and 600 V on the secondary. It has 1.5 V per turn. Then the number of turns on primary and secondary are ---------- a) 20 and 8 b) 100 and 10 c) 1000 and 120 d)1000 and 400 e) none of the previous. 2-A 600/200 V single phase transformer is supplying a load of 60 A at a p.f of 0.707 lag. The no load current is 3A at 0.2 P.f. lag. Then the primary current is ---- a) 63A b) 22.56A c) 69A d)24 e) 21.55 f) none of the previous. S 3- The silicon ratio in transformer iron cannot be increased greater than 5% because of- a) the iron loss will increase b) the hysteresis loss will increase c) the eddy current loss will increase d) none of the previous 4- If V1 = 400V and the wattmeter read 800W at no load test then the value of Ro is none of the previous a)100 b)4002 c) 200 d)160002 S
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