The no load current drawn by transformer is usually what per cent of the full load current * 20% to 30 % O 0.2 % to 0.5% O 0.2% to 5% O 12% to 15%

Q: The core losses in the transformer are also called O Variable losses O Winding losses O Constant…

A: Core losses in the transformer is called?

Q: When the turns ratio of a transformer is 10 and the primary ac voltage is 6 V. the secondary voltage…

A: Given, Transformer turns ratio a=N1N2=10 Primary voltage V1=6 V

Q: A single phase transformer has a full load total loss of 900 W and an iron loss of 500 W. The copper…

A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…

Q: The equivalent resistance of the primary of a transformer having K = 5 and R₁ = 0.1 ohm when…

A: Given, The parameter of transformer is having K=5R1=0.1 Ω

Q: What will be the losses of a transformer if it is working in step up mode compared to its losses in…

A: Transformer: It is an electrical device that is responsible for transforming the voltage from one…

Q: 8- The equivalent resistance of the primary of a transformer having K=4 and RI -0.1 ohm when…

A: For a transformer - K=4 and The primary equivalent resistance is, R1 = 0.1 ohm

Q: What will be the losses of a transformer, if it is working in step up mode compared to losses in…

A: The transformer that has the output voltage more than the primary is the step up transformer. In…

Q: The peak voltage rating of the transformer secondary for a voltage doubler that produces an output…

A:

Q: Certain transformer has full-load copper losses of 500 W. What is value of copper loss at half load:…

A: Given data: Pc1=500 W

Q: The leakage flux is less in type transformer.

A: There are two types of transformers, namely Core type transformer Shell type transformer

Q: 4) The core loss is not affected by the load. 5) The transformer Can be used to transform direct…

A: In any machine core losses are always constant Only the iron losses or copper losses vary with the…

Q: The no load current drawn by transformer is usually what per cent of the full load current 0.2 % to…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: 7) The restricted earth protection for the transformer is on the (A) high voltage side. (B) low…

A:

Q: 7. What is the no-load voltage when the full-load secondary voltage is 108 V and transformer…

A: Given: In a transformer, Full load secondary voltage V2fl=108 V. Transformer regulation VR=10%.

Q: . Examine the labeling on the transformer. What are the current designations on the primary (110V)…

A:

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

A: Given, For a transformer the turns ratio is N1N2=215 And the secondary turns is N2=300

Q: TRUE or FALSE: In a step-up transformer, the winding used in the primary has a smaller…

A: KVA rating of primary and secondary current are same .  High voltage winding implies Higher voltage…

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

A: In transformer, the power will.... With decrease in current.  Fill the blank

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

A:

Q: In transformer, open circuit test is used to determine

A: Open circuit test is conducted on low voltage side by open circuiting high voltage side terminals in…

Q: 22. The voltage applied to the h.v. side of a transformer during short-circuit test is 2% of its…

A:

Q: In Step down transformer, the Number of the primary winding (N1) is Larger Number of the secondary…

A: a transformer changes the voltage level  when its step up then it increases the voltage level from…

Q: ) In Current transformer Primary turns is __________ than Secondary turns. a. Less b. none c. Same…

A: The current ratio will sets the turns ratio and as the primary usually consists of one or two turns…

Q: The equivalent resistance of the primary of a transformer having K = 2 and R1 = 0.2 ohm when…

A:

Q: 3. Examine the labeling on the transformer. What are the current designations on the primary (110V)…

A:

Q: If the secondary of the transformer is step down, the primary will have More turns Fewer turns O…

A: In this question we will write about step down transformer primary and secondary winding  turn…

Q: In potential transformer primary winding is connected across

A: Potential transformer is a measurement equipment to measure voltage in High voltage lines(HV lines).

Q: 3. Examine the labeling on the transformer. What are the current designations on the primary (110V)…

A:

Q: The ordinary efficiency of a given transformer is maximum when it runs at full load it runs at…

A: Given :   Transformer is a electrical device which is used to step up and step down the voltages…

Q: The primary winding of a 50 Hz single phase transformer has 480 turns and is fed from 6400V supply.…

A: Given : A single phase transformer , f = 50 Hz  With N1 = 480 turns N2 = 20 turns E1 = 6400 volts To…

Q: :The transformer Iron losses is .Constant independent of the applied voltageO

A:

Q: In transformer, the power will with increase in voltage. remain same decreases be doubled increases

A: Transformer is used to step-up or step-down the voltage level according to the requirement.

Q: The secondary winding of which of the following transformer is always kept close *

A: In current transformer secondary of the transformer is always closed.

Q: The transformer used for the above experiment has two terminals in the primary and three terminals…

A: Given :   Transformers electrical device which is used in the applications such as power…

Q: Which of the following is standard current ratio of a current transformer? O 100-5 300-5 500-5 All…

A:

Q: The thickness of laminations used in a transformer is usually 0.4 mm to 0.5 mm O 14 mm to 15 mm O 25…

A:

Q: In a transformer 480 V input and 208 V output and 100 turns in the secondary. Determine the turns of…

A:

Q: The purpose of the no-load test in the transformer is to determine O Input voltage O Core loss…

A:

Q: The open circuit voltage of a transformer is 242 V and its % regulation is 2%, then the value of…

A:

Q: The equivalent resistance of the primary of a transformer having K = 6 and R1 = 0.2 ohm when…

A:

Q: In transformer, the power will with increase in voltage. O increases O decreases O remain same O be…

A: Transformer current and voltage ratio  V1/ V2 = N1 /N2 V1/ V2 = N1 /N2  AND        I1/I2 = N2 /N1…

Q: The power rating of the primary and secondary windings in the transformer, are---- * O same O…

A: This is from transformer. The solution is given next slide.

Q: Difference is shell type and core type transformer.

A: The following is the differences between core-type and shell-type transformers:

Q: Turns ratio of the transformer is directly proportional to Select one: O a Resistance ratio Ob.…

A: Option b is correct. The detailed explanation is provided below.

Q: A step-up transformer is 91 percent efficient a

A: Given data, Number of turns in primary Np=81 Number of turns in secondary Ns=628 Voltage at primary…

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: In transformer, the secondary side operates almost in open circuited condition.

A: there are two measurement transformer  1. current transformer 2. pottential tranformer we will…

Q: The value of transformation ratio (K) for the step up transformer is a) equal to 0 b) less than 1 c)…

A: Answer: greater than 1   Explanation: a)  It is not a valid option. If k=0 then the secondary turns…

Q: Under short circuit test, the short circuit voltage of transformer is O a. Equal to the rated…

A: In this question we will write about short circuit test of transformer..

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.