Mutual Induction and Transformer

Both Westinghouse and Edison proposed methods for supplying electricity to homes. What advantage did Westinghouse's method have over Edison's$?$

Explain the construction of a voltage transformer.

What is mutual induction that acts as the basic principle of transformers?

What is a potential transformer? Write down its working principle.

Describe the working of a transformer.

On what principle transformer works?

The transformation ratio in the step-up transformer is 

The output voltage of an ideal transformer, connected to a $240 \mathrm{V}$ AC mains, is $24 \mathrm{V}$. This transformer is used to light a bulb with rating $24 \mathrm{V}, 24 \mathrm{W}$. Calculate the current in the primary coil of the circuit. 

What is step up and step down transformer?

The ratio of number of turns in primary and secondary coil of a transformer is $1 : 4$. What type of transformer it is?

__________ increases in a step down transformer.

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 resistances as shown in figure. The output voltage $\left(V_{\mathit{0}}\right)$ is :

The output of a step down transformers is measured to be 48 V when connected to a 12 W bulb. The value of peak current is

The ratio of secondary of primary turns of step up transformer is 4 : 1. If a current of 4A is applied to the primary, the induced current in secondary will be

A step down transformer has 50 turns on secondary and 1000 turns on primary winding. If a transformer is connected to 220 V, 1A AC source, what is output current of the transformer?

For long distance transmission, the ac is stepped up because of high voltage, the transmission is

A step-up transformer is used on $120\mathrm{ }\mathrm{V}$ line to provide a P.D of $2400\mathrm{ }\mathrm{V}$. If the number of turns in the primary is $75$, then the number of turns in the secondary shall be, 

A transformer is used to light a $100\mathrm{ }\mathrm{W}$ and $110\mathrm{ }\mathrm{V}$ lamp from a $220\mathrm{ }\mathrm{V}$ mains. If the main current is $0.5\mathrm{ }\mathrm{A}$. The efficiency of the transformer is approximately -

In a transformer, $N_p=500,\mathrm{ }{N}_s=5000$. Input voltage is $20\mathrm{V}$ and frequency is $50\mathrm{H}\mathrm{z}$. What are the output voltage and frequency? 

A step-down transformer reduces $220\mathrm{ }\mathrm{V}$ to $110\mathrm{ }\mathrm{V}$. The primary draws $5\mathrm{ }\mathrm{A}$ of current and secondary supplies $9\mathrm{ }\mathrm{A}$. The efficiency of the transformer is