List of top Science Questions on Electromagnetism

Assertion (A): Kilowatt-hour (kWh) is the commercial unit of electrical energy.
Reason (R): \( 1\, \text{kWh} = 10^6\, \text{Joules} \)
In Fleming's left-hand rule, the index finger of the left hand indicates

As shown in the diagram, an electron enters perpendicularly into a magnetic field. Using Fleming’s Left-Hand Rule, determine the direction of the force experienced by the electron. 

With the help of a labeled diagram, show the pattern of magnetic field lines around a current-carrying straight conductor. Explain how we can use the right-hand thumb rule to find the direction of magnetic field due to current.
Differentiate between a solenoid and a circular coil.
Explain how a solenoid can be made in a school lab.
Write one use of a strong magnetic field produced inside a solenoid.
State Fleming’s Left-Hand Rule.
When we connect multiple electrical appliances to a circuit with fixed current rating using the same socket:

Draw the pattern of the magnetic field lines for the two parallel straight conductors carrying current of same magnitude 'I' in opposite directions as shown. Show the direction of magnetic field at a point O which is equidistant from the two conductors. (Consider that the conductors are inserted normal to the plane of a rectangular cardboard.)

 

State Fleming's left-hand rule.