HARD
10th ICSE
IMPORTANT
Earn 100

Draw a labelled diagram of a simple a.c. generator.

Important Questions on Electro-Magnetism

EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(C)>Q 21

In an a.c. generator the speed at which the coil rotates is doubled. How would this affect

(a) the frequency of output voltage

(b) the maximum output voltage.

EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(C)>Q 22
Suggest two ways in an a.c. generator to produce a higher e.m.f.
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(C)>Q 23
What energy conversion does take place in a generator when it is in use?
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(C)>Q 24
State two dis-similarities and one similarity between a d.c. motor and an a.c. generator.
MEDIUM
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(C)>Q 25
State one advantage of using a.c. over d.c.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(C)>Q 26
For what purpose are the transformers used? Can they be used with a direct current source?
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(C)>Q 27
State two factors on which the magnitude of an induced e.m.f. in the secondary coil of a transformer depends.
EASY
10th ICSE
IMPORTANT
Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(C)>Q 27
How are the e.m.f in the primary and secondary coils of a transformer related with the number of turns in these coils?