What is a transformer Mcq?
Explanation: A Transformer is a device used to convert low alternating voltage to a high alternating voltage and vice versa. Transformers are based on the phenomena of mutual induction. A transformer consists of a soft iron coil with two coils wound around it which are not connected to one another. 2.
What is CT ratio in transformer?
The CT ratio is the ratio of primary current input to secondary current output at full load. For example, a CT with a ratio of 300:5 is rated for 300 primary amps at full load and will produce 5 amps of secondary current when 300 amps flow through the primary.
Which is not loss in transformer?
EXPLANATION: Mechanical loss occurs when work is being done by the device, but in the transformer, no mechanical work is executed. Hence, the mechanical loss does not occur in the transformer.
What uses a transformer?
Transformers are employed for widely varying purposes; e.g., to reduce the voltage of conventional power circuits to operate low-voltage devices, such as doorbells and toy electric trains, and to raise the voltage from electric generators so that electric power can be transmitted over long distances.
What is class of CT and PT?
The standard accuracy classes of current transformer as per IS-2705 are 0.1, 0.2, 0.5, 1, 3 and 5 for metering CT….Application of CT Core According to Their Class.
| Application | Accuracy Class | |
|---|---|---|
| Precession Metering | 0.1 or 0.2 | BL |
| Commertial Metering | 0.5 or 1.0 | AM, BM, CM |
| Ammeters | 1 or 3 | CD |
| Protection Relays | 5P10 or 5P20 | STU |
Why do we need to study Transformers?
This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Transformers topic which is core in Electronics & Electrical Engineering. A transformer is a static device, which works on the principle of Faraday’s law of electromagnetic induction.
What is the working of transformer?
As we know, the transformer is a static device, so there is no moving part as in the motor. 47) If the transformer is working on, no-load is switched on to a specific source of voltage. It will draw a current Same as the steady-state magnetizing current. Once the steady-state magnetizing current provided to the core has huge residual flux.
What are the merits and demerits of a transformer?
The merits and demerits of a transformer are it operates with higher efficiency and occupies more space with high maintenance cost. Some of the applications of a transformer are regulators, power supply appliances, voltage converter. 1). Transformer works on ______ principle.
How many transformer MCQs are there for engineering students?
This article lists 100 Transformer MCQs for engineering students. All Transformer Questions & Answers given below include a hint and wherever possible link to the relevant topic.