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1MW power is to be delivered from a power station to a town 10 km away. One uses a pair of Cu wires of radius 0.5 cm for this purpose. Calculate the fraction of ohmic losses to power transmitted if power is transmitted at 220V. Comment on the feasibility

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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1MW power is to be delivered from a power station to a town 10 km away. One uses a pair of Cu wires of radius 0.5 cm for this purpose. Calculate the fraction of ohmic losses to power transmitted if a step-up transformer is used to boost the voltage

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Consider the LCR circuit shown in Fig . Find the net current i and the phase of i. Show that ` I=Z/V` . Find the impedence Z for this

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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For an LCR circuit driven at frequency ω, the equation reads`L (dl)/(dt)+Ri+q/c= V_i= V_m sinωt` Multiply the equation by i and simplify where

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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For an LCR circuit driven at frequency ω, the equation reads`L (dl)/(dt)+Ri+q/c= V_i= V_m sinωt` Interpret each term

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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For an LCR circuit driven at frequency ω, the equation reads`L (dl)/(dt)+Ri+q/c= V_i= V_m sinωt` Cast the equation in the form of a conservation of energy

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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For an LCR circuit driven at frequency ω, the equation reads`L (dl)/(dt)+Ri+q/c= V_i= V_m sinωt` Intergrate the equation over one cycle to find that the phase difference between V and i must be

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In the LCR circuit shown in Fig , the ac driving voltage is `v = V_m sin ωt`. Write down the equation of motion for q

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In the LCR circuit shown in Fig , the ac driving voltage is `v = V_m sin ωt`. At t = t0, the voltage source stops and R is short circuited. Now write down how much energy is stored in each of L and

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In the LCR circuit shown in Fig , the ac driving voltage is `v = V_m sin ωt`. Describe subsequent motion of

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If `I=2sqrtt` ampere then calculate average and rms values over `t = 2 to 4

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Find the time required for 50Hz alternating current to change its value from zero to rms

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If `E=20 sin (100pit)` volt then calculate value of E at `t=1/600

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A periodic voltage wave form has been shown in fig. Determine. (a) Frequency of the wave form. (b) Average

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Explain why A.C. is more dangerous than D.C.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If a direct current of value a ampere is superimposed on an alternating current `I = b sinomegat` flowing through a wire, what is the effective value of the resulting current in the circuit

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The Equation of current in AC circuit is `I=4sin[100pi+pi/3] A` . Calculate. (i) RMS Value (ii) Peak Value (iii) Frequency (iv) Initial phase (v) Current at `t =

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If `I=I_0sin omegat, E = E_0 cos [omegat+pi/3]`. Calculate phase difference between `E and

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If `E=500 sin (100 pit)` volt then calculate time taken to reach from zero to

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If Phase Difference between `E and I` is `pi/4 and f = 50 Hz` then calculate time

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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