A 1000 KVA transformer, it is loaded 400kW for 24 hours at o.8 pf lag . If the iron loss equal 2Kw and total loss equal 10 KW. The all-day efficiency is   1-98.7%       2-97.5%       3-99 %       4- 98.5

Q: A Step-down transformer is given and calculate 5:1 120 V 60 Hz V2 1 k? i. Peak load and D.C. load…

A: Since it is a step down transformer therefore V2<V1 and number of turns in primary will be…

Q: A transformer has 400 W as iron loss at full load. The iron loss at half full load will be O 400 W O…

A: Given: A transformer has iron loss at full load, Pifl=400 W Iron loss at half load, Pihl=? Load…

Q: G/ Determin the efficiency of transformer when in Pout Power 500w, iron losses-40 W Copper losses-60…

A:

Q: 50-kVA, 13,200/480-V distributed transformer, the no-load current will be around Select one: O a.…

A: No loade current is always (0-5%) ofRated currentif transformer iscase1 single phaseH.V…

Q: . A transformer with 800 primary turns and 200 secondary turns is supplied with a 100 V ac supply.…

A: E2E1=N2N1=KK= transformation ratio According to question: Given: N1=800 (primary turns) N2= 200…

Q: What are the different losses across the transformer? Which losses are variable? What turns ratio…

A:

Q: A 500 kVA transformer has a constant loss of 500 W and copper loss at full load are 2000 W. Then at…

A: Solve the problem

Q: 2,99 A 200/100 V, 50 Hz transformer is to be excited at 40 Hz from the 100 V side. For the exciting…

A: According to the question we have to find the value of applied voltage.

Q: 100kW 75% Power Factor. The voltmeter reads 240V. What size should the transformer be?

A: The objective of this question is to determine the size of the transformer required for a system…

Q: A-60 kVA Transformer at full load the copper losses 1000 W while the core losses 500 W. What is the…

A: Given a single phase transformer with, Power rating, S=60 kVA. Copper loss, Pcu=1000 W. Core loss,…

Q: A transformer works at 2 KVA with a primary voltage of 96 V. If the load voltage is 230 V ,then the…

A:

Q: Question 11 Not yet answered Marked ou stion Previous page step-up transformer, with turns ratio…

A: Given: Turn Ratio (a) = 12Primary side Voltage (V1) = 220v Find: Secondary Side Voltage V2= ?

Q: In transformer, the power will with decrease in current. O be doubled remain same O increases O…

A: In the step-up transformer, the voltage increase then the current is reduced proportionally. For…

Q: A-60 kVA Transformer at full load the copper losses 1000 W while the core losses 500 W. What is the…

A:

Q: The primary current of a 64 kVA, 1705 V/ 145 V, 50 Hz, single-phase transformer is 3.75 A 37.54 A…

A: primary current of a 64KVA, 1705V/145V, 50Hz, single phase transformer is:

Q: If the supply frequency to the transformer is reduced, the iron loss will

A: Given  Iron losses of the transformer

Q: In transformer, the power will with decrease in current. O decreases O be doubled remain same O…

A: Transformer is constant power and constant frequency device. In transformer current and volatages…

Q: A transformer works at 6 KVA with a primary voltage of 82 V. If the load voltage is 235 V ,then the…

A: Given: A transformer works at, Rated apparent power, S=6 kVA. Primary voltage, V1=82 V. Secondary…

Q: 1kV/2 kV transformer has 750 W hysteresis losses and 250 W eddy current losses. When the applied…

A:

Q: 2. a) If V= sin 8 ‚ find V²V. b) Iƒ Ã=3x²yzâx +x³zây + (yx³ – 2z)â, find V²Ã. r3

A: 2. Given Data: a. A spherical scalar quantity of V=sinθr3 b. A cartesian vector quantity of A→=3x2yz…

Q: Three coils each having resistance of 17 Q are connected in star across 415 V, 50 Hz supply. Then…

A: The power consumed in a 3 phase circuit is  P=3Vl2R=3Il2.R Vl = 440 volt R=17 ohm

Q: The full load copper loss and iron loss of a transformer are 6400 W and 5000 W respectively the…

A:

Q: The full-load copper loss of a transformer is 1600 W. At half-load, the copper loss will be O a.…

A: Given, The full load copper loss of a transformer, Pcufl=1600 W At half load, the load factor x=12…

Q: A transformer works at 3 KVA with a primary voltage of 86 V. If the load voltage is 225 V.then the…

A:

Q: 3- The silicon ratio in transformer iron cannot be increased greater than 5% because of a) the iron…

A:

Q: A transformer works at 3 KVA with primary voltage of98 V. If the secondary voltage is 220 V, then…

A: Given: A transformer works at, Rated kVA, S=3 kVA. Primary voltage, V1=98 V. Secondary voltage,…

Q: The number of turns on the primary and secondary windings of a 1-o transformer are 359 and 37…

A:

Q: 3- The silicon ratio in transformer iron cannot be increased greater than 5% because of a) the iron…

A: 3)  The sillicon ratio in transformer iron cannot be increased more than 5 percent because if more…

Q: A transformer works at 10 KVA with a primary voltage of 94 V. If the load voltag 225 V ,then the…

A:

Q: A transformer works at 7 KVA with primary voltage of 88 V. If the secondary voltage is 230 V, then…

A: Given: A transformer works at, Rated apparent power, S=7 kVA. Primary voltage, V1=88 V. Secondary…

Q: A Transformer has turns ratio of 2:15. When the secondary turns is 300, what is the primary turns? O…

A: Given data Turns ratio K= 2:15                      K= 2/15                      K= 0.13333…

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.