List of top Science Questions on Magnetic Effects Of Electric Current

State Fleming’s Left-Hand Rule and explain the principle of an electric motor.
State Fleming’s Left-Hand Rule and explain its application in an electric motor.
Assertion : The needle of a magnetic compass kept in strong external magnetic field, always aligns itself in north-south direction on the earth. Reason (R): Behaviour of the needle of a compass is same as that of a freely suspended bar magnet.
List any two features of the electric current used in the houses of India.
Draw the pattern of magnetic field lines due to a current carrying straight conductor. Mark on it the direction of current in the conductor and the direction of the magnetic field developed. Name the rule that helps us to determine the direction of magnetic field lines in this case.
Why can't two magnetic field lines cross each other? Draw magnetic field lines showing the direction of the magnetic field due to a current-carrying long straight solenoid. State the conclusion which can be drawn from the pattern of magnetic field lines inside the solenoid. Name any two factors on which the magnitude of the magnetic field due to this solenoid depends.
What are magnetic field lines? How is the direction of magnetic field at a point determined? Draw the pattern of magnetic field lines of the magnetic field produced by a current-carrying circular loop. Mark on it the direction of (i) current and (ii) magnetic field lines. Name the two factors on which the magnitude of the magnetic field due to a current-carrying coil depends.
Show by making a diagram for the magnetic lines of force around a bar magnet.

The direction of the force acting on the electron entering perpendicular to the magnetic field as shown in the figure, will be:

Draw the pattern of the magnetic lines of force produced due to a current-carrying circular loop.
State the following laws with the help of labelled diagram. With the help of the following, the direction of which physical quantity can be known?
(i) Fleming’s Left Hand Rule
(ii) Right Hand Thumb Rule
On which factors does the force acting on a current-carrying conductor placed in a magnetic field depend?
On which factors does the magnetic field due to a current-carrying solenoid depend?
What is Fleming's Left Hand Rule?
What are the factors on which the force acting on a current-carrying conductor depends when placed in a uniform magnetic field? Write the rule to find the direction of this force.
State the right-hand thumb rule for finding the direction of magnetic field associated with a current carrying conductor. Show the magnetic field lines due to a straight current carrying conductor.
On which factors does the force acting on a current carrying conductor placed in a magnetic field depend?
A freely suspended current carrying solenoid always rests in:
What is the Fleming's left-hand rule? On which factors does the force acting on a current-carrying conductor depend when placed in a magnetic field?
On which factors does the magnetic field due to a current-carrying conductor depend? Write and explain the name of the law used to find the direction of the magnetic field.
A split ring is used in:
The frequency of alternating current in household electric circuits is:
A rectangular coil of a copper wire is rotated in a magnetic field. The direction of the induced current in the coil changes after:
Write any two properties of magnetic field lines.
In which device does the split ring act as a commutator?