312315 EEE Manual Practical No 2 Answers
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| 312315 EEE Manual Practical No 2 Answers |
Practical Significance:
In industries measurements of mutually induced emf with utmost accuracy and precision is a prime requirement. Such kinds of measurements are possible using measuring instruments like voltmeters, ammeters,s, etc. In this practical, we use a voltmeter, and an ammeter to measure the mutually induced emf.
Procedure
1. Connect the circuit as shown in the diagram.
2. By using an autotransformer apply voltage to the primary winding of the transformer.
3. Observe the readings of primary winding and secondary winding.
Observation table
| S.No. | Primary Voltage (Vp) | Secondary Voltage (Vs) | Ratio (Vs/Vp) |
|---|---|---|---|
| 1 | 3 V | 6 V | 2 |
| 2 | 5 V | 10 V | 2 |
| 3 | 7 V | 14 V | 2 |
| 4 | 10 V | 16 V | 1.6 |
Practical related questions
1. Define statically induced emf.
Answer:
When the conductor is stationary and the magnetic field is varying, the generated EMF in such a way is known as statically induced EMF (as in a transformer). It is so called because the EMF is induced in a conductor which is stationary.
2. Define self-induced emf. Give one example of self-induced emf
Answer:
Self-induced emf is defined as the e.m.f generated in the coil due to the change of flux made by linking it with its own turns. The magnitude of self-induced emf is directly proportional to the rate of change of current in the coil.
3. Define mutually induced emf. Give one example of mutually induced emf.
Answer:
The emf generated in a coil due to the change of flux produced by another neighboring coil linking to it is called Mutually Induced emf.