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Recent questions tagged electro magnetism
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1
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How are the e.m.f in the primary and secondary coils of a transformer related with the number of turns
asked
Apr 2, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
magnetic effect of current
electromagnetism
+1
vote
1
answer
The adjacent diagram shows a small magnet placed near a solenoid AB. Current is switched on
asked
Apr 1, 2019
in
Class 10
by
kratos
electro magnetism
class-10
magnetic effect of current
icse
electromagnetism
+1
vote
1
answer
Complete the following diagram in Fig. 10.45 of a transformer and name the parts labelled A and B.
asked
Mar 30, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
+3
votes
1
answer
Draw a labelled diagram of a d.c. motor.
asked
Mar 29, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
+1
vote
1
answer
The following diagram in Fig. 10.44 shows a coil X connected to a sensitive centre –zero galvanometer
asked
Mar 26, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
+3
votes
1
answer
What is an electric motor? State its principle.
asked
Mar 25, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
+3
votes
1
answer
Why is it more difficult to move a magnet towards a coil which has large number of turns?
asked
Mar 24, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
+2
votes
1
answer
What is an electric motor? State its principle.
asked
Mar 17, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
+1
vote
1
answer
A device is used to transform 12V a.c. to 200V a.c. (1) What is the name of this device?
asked
Mar 16, 2019
in
JEE
by
kratos
jee
electric power
electro magnetism
class-10
icse
electromagnetism
house hold circuits
magnetostatics
magnetism
jee mains
+1
vote
1
answer
A wire bent into a circle carries current in an anticlockwise direction. What polarity does this face of the coil exhibit?
asked
Mar 15, 2019
in
JEE
by
kratos
magnetic effects of electric current
jee
electro magnetism
class-10
icse
magnetic effect of current
electromagnetism
jee mains
magnetism
+3
votes
1
answer
A straight wire lying in a horizontal plane carries a current from north to south. (a) What will be the direction
asked
Mar 13, 2019
in
Class 12
by
kratos
electro magnetism
moving charges
class-10
icse
electromagnetism
magnetism
class-12
+1
vote
1
answer
Draw the pattern of magnetic field lines through and around a current carrying loop of wire. Mark the directions of
asked
Mar 11, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
cbse
+2
votes
1
answer
Electric supply in house is of—
asked
Mar 7, 2019
in
Class 12
by
kratos
alternating current
class-12
class-10
icse
electro magnetism
cbse
+3
votes
1
answer
What is an electromagnet? List any two uses.
asked
Mar 1, 2019
in
Class 10
by
kratos
cbse
magnetic effects of electric current
electro magnetism
class-10
icse
magnetic effect of current
+1
vote
1
answer
Suggest two ways in an a.c. generator to produce higher e.m.f.
asked
Feb 26, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
magnetic effect of current
+1
vote
1
answer
Draw a diagram to represent the magnetic field lines along the axis of a current carrying solenoid
asked
Feb 21, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
+2
votes
1
answer
fill in the blanks on reversing the direction of the current in a wire the magnetic field produced by its gets……..
asked
Feb 19, 2019
in
JEE
by
kratos
jee
electro magnetism
class-10
icse
electromagnetism
jee mains
magnetostatics
magnetism
+2
votes
1
answer
State two ways by which the magnetic field of a solenoid can be made stronger.
asked
Feb 15, 2019
in
Class 10
by
kratos
cbse
magnetic effects of electric current
magnetic field
electro magnetism
class-10
magnetic effect of current
icse
electromagnetism
+2
votes
1
answer
Draw labelled diagram to show various components of a (1) Step up transformer
asked
Feb 15, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse
electromagnetism
+1
vote
1
answer
Complete the following sentences: (i)In a step-up transformer, the number of turns in the primary
asked
Feb 13, 2019
in
Class 10
by
kratos
electro magnetism
class-10
icse 10
icse
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