$CATEGORY: Science - Khan Academy/13.Magnetic Effect of electric current/13.Magnetic Effect of electric current--Magnetic Field and Field Lines

//Multiple Choice

Magnetic field lines inside a bar magnet\: {
    ~Are directed from north to south
    =Are directed from south to north
    ~Are parallel and non-uniform
    ~Are circular
}

Which of the following is a property of magnetic field lines? {
    ~They intersect each other
    =They form closed loops
    ~They do not exist inside a magnet
    ~They spread apart near the poles
}

If the magnetic field lines are closer together, the magnetic field at that point is\: {
    ~Weak
    ~Zero
    =Strong
    ~Uniform
}

Magnetic field lines around a current-carrying straight conductor are\: {
    ~Straight lines
    ~Elliptical
    =Circular
    ~Parallel
}

Magnetic field lines can never\: {
    ~Form loops
    ~Start from the south pole
    =Cross each other
    ~Go outside the magnet
}

//True or False

Magnetic field lines can cross each other. {F}

Magnetic field lines always form closed loops. {T}

The magnetic field strength is weaker near the poles of a magnet. {F}

The direction of the magnetic field at a point is given by the tangent to the magnetic field line at that point. {T}

Magnetic field lines are imaginary, but they represent real effects. {T}

//Fill in the blanks



//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Magnetic field lines -> No crossing of lines
=Magnetic poles -> North and south poles
=Direction of magnetic field lines -> North to south outside magnet
=Magnetic field strength -> Stronger near poles
=Magnetic field lines do not -> form Closed loops
}


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