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Though the image size is larger than the object, the angular size of the image is equivalent to the angular size of the object. A magnifying glass supports one seeing the objects closer than the least distance of dist...
As the choke coil reduces the voltage across the tube without wasting much power, it is used in the fluorescent tubes with ac mains. An ordinary resistor cannot be used instead of choke coil because it wastes power in...
When an iron core is inserted in the choke coil (which is in series with a lamp connected to an ac line), the lamp will glow dimly. This is because the choke coil and the iron core increase the impedance of the cir...
The dc signal will appear across capacitor C because for dc signals, the impedance of an inductor L is negligible while the impedance of a capacitor C is very high (almost infinite).Therefore, a dc signal appears acr...
Yes, a capacitor is used in the primary circuit of an induction coil. This is because, when the circuit is broken, a high induced voltage is used to charge the capacitor to avoid sparks.
Yes, in any ac circuit, the applied instantaneous voltage is equal to the algebraic sum of the instantaneous voltages across the series elements of the circuit. The same is not true for rms voltage because voltages ac...
Average power transferred to the inductor is zero as actual voltage leads the current by π/2
If a resistor is included in the circuit, then the total initial energy gets dissipated as heat energy in the circuit. The LC oscillation gets damped due to the resistance.
It is known that,Power = V X IPower = 220 x 2.2 Power = 484 W Therefore, the net power consumed over a full cycle is 484 W
Electric potential at a point in an electric field is the amount of work done in bringing a unit positive charge from infinity to the point. (i) Electric potential is a scalar quantity.(ii) S.I. unit: Volt(V). (ii...
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