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A 100 VA, 120/12 V transformer is to be connected so as to form a step-up transformer. A Primary voltage of 120 V is applied to the transformer. What is the secondary voltage of the transformer?
A 3 phase transformer has its primary connected in delta and secondary in star. Secondary to primary turns ratio per phase is 5. What would be the secondary voltage for a primary voltage of 400 V?
A 25 KVA transformer is constructed to a turns ratio of N1/N2 = 10. The impedance of primary winding is 3+j5 ohms and of secondary winding is 0.5+j0.8 ohms. What will be the impedance of transformer when referred to primary?
Find the load impedance in a quarter line transformer with characteristic impedance of 75 ohm and input impedance of 200 ohm.
An ideal transformer is having 150 turns primary and 750 turns secondary. The primary coil is connected to a 240 V, 50 Hz source. The secondary winding supplies a load of 4 A at lagging power factor of 0.8. What is the power supplied by the transformer to the load?
A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current?
With reference to primary and secondary succession, consider the following statements: A) Primary succession takes place in areas which have lost all the living organisms that existed there whereas secondary takes place in areas where no living organisms ever existed. B) Rate of secondary succession is much slower compared to primary succession. Which of the statements given above is/are correct?
The fees of primary section (X) increases by Rs. 40 every year, while the fees of secondary section (Y) increases by Rs. 30 every year. If in 2003, the fees of primary section was Rs. 420 and that of secondary section was Rs. 630, then in which year primary section will have Rs. 40 more fees than the secondary section? 
একটি স্টেপ আপ ট্রান্সফরমারে, গৌণ কুণ্ডলীর পাকসংখ্যা মুখ্য কুন্ডলীর পাকসংখ্যার দ্বিগুণ। যদি মূখ্য কুন্ডলীকে কোন পরিবর্তী বিদ্যুৎ লাইনের সাথে সংযুক্ত করা হয়, তাহলে মুখ্য কুণ্ডলীর তুলনায় গৌণ কুণ্ডলীতে- (In a step up transformer, the number of turns in the secondary coil is twice to that of primary coil. If you apply an alternating current in the primary coil, then in the secondary coil compared to the primary coil-)
Consider the following statement: a) The inner edge of primary rainbow is violet. b) The inner edge of secondary rainbow is violet. c) The primary rainbow is brighter than secondary rainbow. d) The secondary rainbow is brighter than primary rainbow. Which of the above statements are correct?