A transformer operating at primary voltage 8, | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) For an ideal transformer,the power delivered to the load is the same as the power drawn from the source.Given: Primary voltage $V_p = 8\,kV = 8000

Vedclass · Accepted Answer

$800\,\Omega$ and $0.32\,\Omega$

Vedclass · Answer

(C) For an ideal transformer,the power delivered to the load is the same as the power drawn from the source.Given: Primary voltage $V_p = 8\,kV = 8000\,V$,Secondary voltage $V_s = 160\,V$,Power $P = 80\,kW = 80000\,W$.The resistance in the primary circuit $R_p$ is given by $P = \frac{V_p^2}{R_p}$.$R_p = \frac{V_p^2}{P} = \frac{(8000)^2}{80000} = \frac{64 	imes 10^6}{8 	imes 10^4} = 8 	imes 10^2 = 800\,\Omega$.The resistance in the secondary circuit $R_s$ is given by $P = \frac{V_s^2}{R_s}$.$R_s = \frac{V_s^2}{P} = \frac{(160)^2}{80000} = \frac{25600}{80000} = 0.32\,\Omega$.Thus,the resistances are $800\,\Omega$ and $0.32\,\Omega$.

$A$ transformer operating at primary voltage $8\,kV$ and secondary voltage $160\,V$ serves a load of $80\,kW$. Assuming the transformer to be ideal with a purely resistive load and working on unity power factor,the resistances in the primary and secondary circuits would be:

Similar Questions

How does a transformer affect the voltage and current?

Which of the following is correct for a real transformer?

If the primary coil of a transformer has $100$ turns and the secondary has $200$ turns,then for an input of $220 \ V$ at $10 \ A$,the output current in the step-up transformer will be . . . . . . . (in $A$)

$A$ transformer has $100$ turns in the primary coil and carries $8$ $A$ current. If input power is $1$ $kW$, the number of turns in the secondary coil to have $500$ $V$ output will be

$A$ step-up transformer operates on a $230 \ V$ line and a load current of $2 \ A$. The ratio of primary and secondary windings is $1:25$. Then the current in the primary is (in $A$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module