What is the capacitance when a capacitor carries a charge of 0.6 C at 30 V?
A series R.L C. circuit is to be connected to an a.c source V(t) = Vm sin (ωt + Φ) volt. Which one of the following is correct? The transient current will be absent if the source is connected at a time to such that
The ability of a ferromagnetic material to withstand an external magnetic field without becoming demagnetized is called _______________
The reverse saturation current at a temperature of for a PN junction which hasat is
A control system is represented by the following block diagram.
For a unit step input, the steady state error is . The value of k is
Which of the following are first order systems?
2) RC network
3) Pneumatic systems
4) Thermal system
Why 3 single-phase transformers are preferred over one 3-phase transformers in hilly areas and underground mines.
i.Cost of 3 single-phase transformers is less.
ii.Transportation is easy
iii.Maintenance is easy.
The necessary conditions for parallel operation of transformers are:
i.Same phase sequence
ii.Same voltage ratio and voltage rating.
iii.Relative phase difference should be same.
Load encroachment in case of impedance relay is a _________Phenomenon.
A potential difference of 200 mV across the terminals of a moving coil instrument gives a deflection of 10 mA. The shunt resistance required for a full scale deflection corresponding to 40 A is