Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 10 English Medium Physics Electromagnetic Induction
The figure of a generator is given below
The figure shows a resister, galvanometer connected to a 6V battery.
In our country the frequency of AC produced for transmission is 50Hz.
Observe the figures a,b,c given below and answer the questions (Solenoid,Bar magnet and galvanometer)
An armature coil of an AC generator when moved in the magnetic field, induced current is produced.
Whenever change occurs to the magnetic flux connected to a closed circuit, a current is induced.
Find out the correct statement/statements from those given below.
b. when a magnet is moved close to a solenoid, the magnetic linked with the solenoid will increase
The figure given below shows an instrument that changes sound energy into electrical energy.
Some relations regarding transformers are given below. Among these select and write down the one that relates to step up transformers.
Correct error in the underlined part of the following statements if any
a. AC of frequency is 50Hz has 50 cycles per second.
b. In an AC generator, electric current flows in one direction for the first half rotation and reverses direction in the next half.
A transformer has 10000 turns and 240V , 0.2A in the primary coil. If the current through secondary coil is 0.4A.
Given below is the figure of a transformer
The figures of the two stages of an armature that rotates in a magnetic field is shown below.
Name the electronic components given below.
Given below is the picture of a transformer.
Find out the odd one and Justify your answer. Microphone, loud speaker, Transformer, Generator
Loud speaker. All other devices works based on electromagnetic induction
By increasing diameter of conductors, transmission loss could be reduced.
Identify the relation in the first pair and complete the following: Electro-magnetic induction: Moving coil microphone Mutual Induction :..............................
The number of turns in the primary of a transformer is two times greater than that in the secondary, then
Find out the relation and fill in the blanks
Moving coil microphone
Select and write down the correct statements regarding a step down transformer from those given below.
b. Power is same in primary and secondary. c. Primary current is less than secondary current.
The figure shows copper coils of same thickness and different turns arranged in four circuits. If all the bulbs are of same power answer the following questions analysing each figure.
Identify the relationship between the terms in the first pair and fill up the second pair accordingly: Generator : Armature Moving coil microphone : ..............
The figure of a DC generator is given below.
Identify the relation in the first pair and complete the second pair.
Mechanical energy is changed in to electrical energy
Moving coil microphone
sound energy changes to electrical energy
The current in the primary of a step up transformer that has no energy loss is........ (More, Less, equal)
First part of a house hold circuit is shown in the figure:
Observe the figure and answer the questions given.
Self induction is a phenomenon by which a changing electric current produces an induced emf across the coil itself.