Chapter 3 : Magnetism and magnetic effects of electric current โ Important 2 Mark Questions
Most Repeated 2 Mark Questions
Curated from Previous Year Question Papers
State Fleming’s left hand rule.
Stretch the forefinger, middle finger and thumb of the left hand in mutually perpendicular directions.
Explain the concept of velocity selector.
By proper choice of electric and magnetic fields , particles with a particular speed can be selected. Such an arrangement of fields is called a velocity selector .
State Ampere’s circuital law.
The line integral of magnetic field over a closed loop is ฮผโ times the net current enclosed by the loop .
Where Ienclosed is the net current linked by the closed loop C.
Give the properties of diamagnetic materials.
The properties of diamagnetic materials are:
Is an ammeter connected in series or parallel in a circuit? Why?
An ammeter must offer low resistance so that it does not change the current passing through it.
Therefore, an ammeter is connected in series to measure the circuit current.
What are the limitations of cyclotron?
What is magnetic permeability?
Magnetic permeability is the measure of the ability of a material to allow the passage of magnetic field lines through it.
How will you increase the current sensitivity of a galvanometer?
The current sensitivity of a galvanometer can be increased by:
Appeared Once Questions
Curated from Previous Year Question Papers
State Maxwell’s right hand corkscrew rule.
If we rotate a right-handed screw using a screwdriver:
What is hysteresis?
The phenomenon of lagging of magnetic induction behind the magnetising field is called hysteresis.
