Transformer PYQs: JEE Mains Physics

Showing 1–9 of 9 questions

1. 1. \(A\) power transmission line feeds input power at \(2\).\(3\) \(\mathrm{kV}\) to a step down transformer with its primary winding having \(3000\) turns. The output power is delivered at \(230 \mathrm{~V}\) by the transformer. The current in the primary of the transformer is \(5 \mathrm{~A}\) and its efficiency is \(90 \%\). The winding of transformer is made of copper. The output current of transformer is _______ \(A.\) 2024 Hard
2. 2. A transformer has an efficiency of \(80 \%\) and works at \(10 \mathrm{~V}\) and \(4 \mathrm{~kW}\). If the secondary voltage is \(240 \mathrm{~V}\), then the current in the secondary coil is _______. 2024 Hard
3. 3. Primary coil of a transformer is connected to \(220 \mathrm{~V}\) ac. Primary and secondary turns of the transforms are \(100\) and \(10\) respectively. Secondary coil of transformer is connected to two series resistance shown in shown in figure. The output voltage \(\left(\mathrm{V}_0\right)\) is _______.
   2024 Hard
4. 4. Primary side of a transformer is connected to \(230 \mathrm{~V}, 50 \mathrm{~Hz}\) supply. Turns ratio of primary to secondary winding is \(10: 1\). Load resistance connected to secondary side is \(46\  \Omega\). The power consumed in it is : 2024 Hard
5. 5. An ideal transformer with purely resistive load operates at \(12\,kV\) on the primary side. It supplies electrical energy to a number of nearby houses at \(120\,V\). The average rate of energy consumption in the houses served by the transformer is \(60\,kW\). The value of resistive load (Rs) required in the secondary circuit will be \(.........\,m \Omega\). 2023 Medium
6. 6. 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 purely resistive load and working on unity power factor, the loads in the primary and secondary circuit would be. 2022 Medium
7. 7. For the given circuit, comment on the type of transformer used:
   2021 Medium
8. 8. A power transmission line feeds input power at \(2300\,V\) to a step down transfonner with its primary windings having  \(4000\) turns, giving the output power at \(230\,V.\)  If the current in the primary of the transformer is  \(5\,A,\) and its efficiency is \(90\%,\)  the output current would be......\(A\) 2019 Medium
9. 9. A transformer consisting of \(300\) turns in the primary and \(150\) turns in the secondary gives output power of \(2.2\, kW\). If the current in the secondary coils is \(10\, A\), then the input voltage and current in the primary coil are 2019 Medium

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