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Basic Electrical Engineering

Derive an expression for the resonant frequency of a parallel circuit, one branch consisting of a coil of inductance L and resistance R and the other branch of capacitance C.

22 June, 2022
The series RL circuit with parallel C is given in Fig. 19. The designed circuit consists of resistance R, inductance L are in series with parallel configuration of capacitance C. Let us consider the current I flowing through the RLC circuit by the a.c. voltage source with constant value of V.
Basic Electrical Engineering

The galvanometer shown in the circuit has a resistance of 5 Ω. Find the current through the galvanometer using Thevenin’s theorem.

Fig.22(a)

22 June, 2022
Equivalent resistance of the circuit \(R_{th}=\frac{10\times15}{10+15}+\frac{12\times16}{12+16}=6+6.86=12.86\ \mathrm{\Omega}\)
Basic Electrical Engineering

Derive the expression of quality factor of series R-L-C circuit at resonance.

22 June, 2022
The quality factor is , in general, defined as the ratio of resonant frequency to bandwidth. It is given by
Basic Electrical Engineering

Prove that current is purely resistive circuit is in phase with applied A.C. voltage and current purely capacitive circuit leads applied voltage by 900 and draw their waveform.

22 June, 2022
A pure resistive circuit is shown in Fig. 12(a) contain a pure resistance R connected across an AC sinusoidal voltage source. The instantaneous value of an alternating source voltage is given by
Basic Electrical Engineering

State and explain Biot – Savart law.

22 June, 2022
This law was deduced from a number of experiments on the effect of current carrying conductor on permanent magnets such as the compass needle experiment of oersted.
Basic Electrical Engineering

State Ampere’s Circular law.

22 June, 2022
Ampere’s circular law states that the line integral of the tangential component of the magnetic field around a closed path is equal to the current enclosed by the path.
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