power

An electrical component has voltage drop $v = V_m \sin (\omega t)$, when the current through it is $i = I_m \sin (\omega t-\theta)$. What is the average power dissipated over a hal...

A continuous time periodic signal x(t) is $x(t) = 1 + 2 \cos 2\pi t + 2 \cos 4\pi t + 2 \cos 6\pi t$ If T is the period of x(t), then $\frac{1}{T} \int_{0}^{T} |x(t)|^2 dt = $ ____...

All the elements in the circuit are ideal. The power delivered by the 10 V source in watts is

The power supplied by the 25 V source in the figure shown below is ________ W.

A 220 V, 10 kW, 900 rpm separately excited DC motor has an armature resistance Rₐ = 0.02 Ω. When the motor operates at rated speed and with rated terminal voltage, the electromagne...

The voltage across the circuit in the figure, and the current through it, are given by the following expressions: v(t) = 5 - 10 cos(wt + 60°) V i(t) = 5 + X cos(wt) A where w = 100...

An incandescent lamp is marked 40W, 240V. If resistance at room temperature $$\left(26^\circ\mathrm C\right)\;\mathrm{is}\;120\mathrm\Omega$$ and temperature coefficient of resista...

How many 200 W/200 V incandescent lamps connected in series would consume the same total power as a single 100 W/200 V incandescent lamp?

A passive 2-port network is in a steady state.Compare to its input, the steady state output can never offer

Two incandescent light bulbs of $$40$$ $$W$$ and $$60$$ $$W$$ rating are connected in series across the mains. Then

When a resistor $$R$$ is connected to a current source, it consumes a power of $$18$$ $$W.$$ when the same $$R$$ is connected to a voltage source having the same magnitude as the c...

Neglecting all losses, the developed torque $$(T)$$ of $$d.c.$$ separately excited motor, operating under constant terminal voltage, is related to its output power $$(P)$$ as under