A transformer having efficiency 90 % is worki | vedclass

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

Question

(B) Given: Efficiency $\eta = 90 \% = 0.9$, Input Voltage $V_p = 200 \ V$, Input Power $P_{in} = 3 \ kW = 3000 \ W$, Secondary Current $I_s = 6 \ A$.F

Vedclass · Accepted Answer

$450 \ V, 15 \ A$

Vedclass · Answer

(B) Given: Efficiency $\eta = 90 \% = 0.9$, Input Voltage $V_p = 200 \ V$, Input Power $P_{in} = 3 \ kW = 3000 \ W$, Secondary Current $I_s = 6 \ A$.First, calculate the primary current $I_p$ using the input power formula: $P_{in} = V_p 	imes I_p$.$3000 \ W = 200 \ V 	imes I_p \implies I_p = \frac{3000}{200} = 15 \ A$.Next, calculate the output power $P_{out}$ using efficiency: $P_{out} = \eta 	imes P_{in}$.$P_{out} = 0.9 	imes 3000 \ W = 2700 \ W$.Finally, calculate the secondary voltage $V_s$ using the output power formula: $P_{out} = V_s 	imes I_s$.$2700 \ W = V_s 	imes 6 \ A \implies V_s = \frac{2700}{6} = 450 \ V$.Thus, the secondary voltage is $450 \ V$ and the primary current is $15 \ A$.

$A$ transformer having efficiency $90 \%$ is working on $200 \ V$ and $3 \ kW$ power supply. If the current in the secondary coil is $6 \ A$, the voltage across the secondary coil and the current in the primary coil are respectively:

Similar Questions

In a step-up transformer,which one of the following statements is correct?

In an ideal step-down transformer, out of the following quantities, which quantity increases in the secondary coil?

$A$ step-down transformer reduces the voltage of a transmission line from $2200 \,V$ to $220 \,V$. The power delivered by it is $880 \,W$ and its efficiency is $88 \%$. The input current is

$A$ current of $5 \text{ A}$ is flowing at $220 \text{ V}$ in a primary coil of a transformer. If the voltage produced in the secondary coil is $2200 \text{ V}$ and $50 \%$ of power is lost, then the current in the secondary coil will be (in $\text{ A}$)

For an ideal transformer, if $N_S > N_P$, then . . . . . . .

Vedclass Test Series

Exam Paper Generator

Online Exam Module