PYQs Based Test - 02 : Electrical Circuits and Machines

If each of the values of inductance, capacitance and resistance of a series LCR circuit are doubled, the Q-factor of the circuit would

In full sunlight, a solar cell has a short circuit current of 75 mA and a current of 70 mA for a terminal voltage of 0.6 V with a given load. The Thevenin resistance of solar cell is

A load resistor R${}_L$ is connected to a battery of voltage E with internal resistance Rᵢ through a resistance R${}_S$ as shown in the figure. For fixed values of R${}_L$ and Rᵢ, the value of R${}_S$ (≥ 0) for maximum power transfer to R${}_L$ is

Three currents i₁, i₂ and i₃ meet at a node as shown in the figure. If i₁ = 3 cos (ωt) ampere, i₂ = 4 sin (ωt) ampere and i₃ = I₃ cos (ωt + θ) ampere, the value of I₃ in ampere is

A coil having an impedance of (10 + j100) Ω is connected in parallel to a variable capacitor as shown in figure. Keeping the excitation frequency unchanged, the value of the capacitor is changed so that parallel resonance occurs. The impedance across terminals p-q at resonance (in Ω) is ______.