Define the transformation ratio of a transformer.

Important Questions on Electromagnetism

EASY

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 10 - Electromagnetism>QUESTIONS>Q 14

For a transformer

r = 12

, Is it a step-up or step-down transformer?

MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 10 - Electromagnetism>QUESTIONS>Q 15

A transformer (efficiency

100 %

) is connected to

220 V

,

1.1 kW

a.c. supply. Its transformation ratio is

0.05

. What is the primary to secondary turn ratio? What are output potential and output current?

MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 10 - Electromagnetism>QUESTIONS>Q 16

The figure given below shows a transformer. Name the type of this transformer. What is its transformation ratio? What is the output potential obtained from this transformer?

Question Image

MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 10 - Electromagnetism>QUESTIONS>Q 17

What type of energy losses are there in a transformer? How you can minimise these losses?

EASY

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 10 - Electromagnetism>QUESTIONS>Q 18

The figure shows two coils $P$ and $Q$ placed very close to each other. Coil $P$ is connected to a battery $B$ and a key $K$ while coil $Q$ is connected to a galvanometer $G$ . What changes if any do you expect in coil $Q$ when key $K$ is just pressed, after some time, just released?