# SSLC Physics Solution Chapter3 Electromagnetic induction

Through the Lorentz force, a current in an electromagnet causes a comparable current in a different neighbouring loop. This process is known as electromagnetic induction. Faraday, who first identified the link between electromagnetic induction and rotary motion in 1832, also came up with the name "electromagnetic rotation." The importance of doing well in SSLC Physics cannot be overstated.

A method for creating electrical currents without moving the wires. An electric field and a magnetic field combine to produce electromagnetic induction. This method can be used to build motors like the ones in a Tesla coil.

 Board SCERT, Kerala Text Book SCERT Based Class SSLC Subject Physics Solution Chapter Chapter 3 Chapter Name Electromagnetic induction Category Kerala SSLC

## Kerala Syllabus SSLC Class 10 Physics Textbook Solution Chapter 3 Electromagnetic induction

### Let us Assess

Qn 1.

Write down the names of some devices that work based on the principle of electromagnetic induction

• Electric generator,
• Transformer,
• Moving coil galvanometer,
• Induction cooker

### Qn 2.What are the components essential for proving electromagnetic induction experimentally?Answer)Magnet, soft iron core connecting wire and Galvanometer.

Qn 3.

Which are the factors that affect the induced emf in electromagnetic induction?

• Number of turns in the armature.
• Strength of magnetic field.
• Speed of armature or field magnet.

### Qn 5.Write down the names of DC sources.Answer)Cell battery, Solar cell, Generator, Thermocouple, etc.

Qn 6.

1. Write down the names of parts numbered.
2. State the working principle of this device.

a)  1) Field Magnet

2) Armature

3) Slip ring

4) Brush

b) Whenever there is a change in the magnetic flux linked with a coil, an emf is induced in the coil. This phenomenon is Electro - magnetic induction.

### Current flows in one directionDirection of current changes continuously

Qn 8.

Analyze the given graph and find out the instances at which the emf is maximum and minimum.

More         Less

T/4,3T/4    OT/2, T

### Qn 9.There is only one type of generator AC generator. Write down your responses about this statement. Answer)Generators are of two types based on the nature of the output. 1. AC Generator and 2. DC generator.In both generators AC is generated in the armature coil. But in a DC generator, AC is converted into DC in the external circuit with the help of split ring commutator.

Qn 10.

Line diagrams of a generator are given.

1. What is the specialty of the electricity reaching the galvanometer if the armatures of both the generators are made to rotate?
2. What is the speciality of the electricity reaching the galvanometer if the field magnets of both the generators are made to rotate?
3. Draw the graphical representation of electricity obtained in both.

a) In the fig 1, DC with varying intensity. Galvanometer needle deflects to one direction

only. In fig2. AC galvanometer needle deflects to both directions.

b) AC in Both

c) Image

### Qn 22.An electric heater calibrated 1.5 kW, 230 V is connected to a household branch circuit having 5 Afuse wire and is, made to work. What will happen? Answer)$Current = \frac{P}{V}= \frac{1500}{230}= 6.52 A$so fuse melts off

Qn 23.

Which are the devices connected in series in a household circuit?

Electric fan, its switch, regulator are connected in series.

Qn 24.

What can be done to save electrical energy in schools and houses?

• Turn off the switch of fan, light etc.. after use
• avoid frequent opening and closing of the refrigerator door
• Close the taps after use
• Use LED bulbs instead of filament lamps and CFl

Qn 25.

Why do some mobile phones use three-pin plugs?

In three pin plug of mobile, plastic pin is fixed in the place of earth pin. As the part of safety measures the phase nuetral holes in the sockets may be closed with caps. Only after earth pin enters the other two sockets will be opened. interesting two pin plug in such socket may be difficult . Three pin plug is used in mobile charger for solving this problem.

### SSLC Physics Textbook Solution

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