Write mathematical expressions for the three phases of a three-phase supply.
Select insulating materials for following parts: (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Write the expressions for delta connected resistors in terms of star connected resistors.
Write the expressions for star connected resistors in terms of delta connected resistors.
What is the Brewster angle and derive an expression for it?
Why EHV busbars are hallowed and circular?
Calculate the voltage necessary and current flowing through a dielectric heating system given specific parameters.
Classify various electric heating methods and explain them briefly.
What are the challenges in designing inverters for harsh climates?
What are the challenges in designing inverters for electric vehicles?
What is the mathematical expression for Helmholtz free energy?
What is the mathematical expression for free energy?
What is the mathematical expression for drift current?
List the factors to be considered while designing feeders and distribution with their functions in brief.
What is Gibbs free energy and its mathematical expression?
Define Average value and give its mathematical expression.
Define R.M.S. value and give its mathematical expression.
Explain with diagram and mathematical representation the leading and lagging signal.
Derive equation for string efficiency with 3 - disc insulators of suspension type.
Derive the expression for maximum efficiency of a transformer.
Derive the expression for side frequencies in RLC resonant circuit.
Derive the expression for resonance frequency in R-L-C series circuit.
Derive the expression for the current of an inductor.
Derive the expression of power for a resistor.
Derive the condition for maximum torque under running condition of a 3 phase induction motor.
Why superposition theorem is not applicable for a circuit containing non linear elements?
What is the Behaviour of RLC elements for transients?
What is the circular ring equation?
Why are Newton's rings circular?
What is the MI of a circular ring?
Why Newton's rings are circular?
Why are eddy currents circular?
How does self-heating affect high-power MOSFET operation?
What is the effect of heating on a bimetallic strip?
What are the limitations of electric heating?
What are the limitations of ohmic heating?
What is the de Broglie hypothesis and derive its equation?
What is the state and derive of Gauss law in electrostatics?
What is the state and derive of Gauss's law?
What is the relation between electric field intensity and electric flux density derive?
What is electric field intensity and derive its expression?
What are active and non active elements?
What do you mean by active and passive elements explain with examples?
What are active and passive elements?
What is active and passive elements?
What are passive and active elements?
Elements and technologies of smart grid system
What is the difference between linear and non-linear circuit elements?
What is the difference between lumped and distributed circuit elements?
What is the difference between active and passive elements with examples?
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