$CATEGORY: Science - Khan Academy/13.Magnetic Effect of electric current/13.Magnetic Effect of electric current--Force on a current carrying conductor in a magnetic field

//Multiple Choice

The force experienced by a current-carrying conductor placed in a magnetic field is maximum when the angle between the magnetic field and the current is\: {
    ~0°
    ~45°
    =90°
    ~180°
}

The direction of force on a current-carrying conductor placed in a magnetic field is given by\: {
    ~Fleming's right-hand rule
    =Fleming's left-hand rule
    ~Ampere's law
    ~Ohm’s law
}

The force on a current-carrying conductor in a magnetic field is proportional to the\: {
    ~Magnitude of the current
    ~Magnitude of the magnetic field
    ~Length of the conductor in the field
    =All of the above
}

What happens to the force on a conductor if the magnetic field is doubled while the current remains the same? {
    ~The force is halved
    ~The force remains the same
    =The force doubles
    ~The force becomes zero
}

If the current through a conductor is reversed, the direction of the force acting on the conductor will\: {
    ~Remain the same
    =Reverse
    ~Become zero
    ~Increase
}

//True or False

A current-carrying conductor experiences maximum force when it is parallel to the magnetic field. {F}

The force on a current-carrying conductor is directly proportional to the length of the conductor in the magnetic field. {T}

The force on a conductor in a magnetic field is independent of the direction of current. {F}

Fleming’s left-hand rule can be used to determine the direction of the force on a current-carrying conductor in a magnetic field. {T}

The direction of force acting on a current-carrying conductor in a magnetic field is along the magnetic field lines. {F}


//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Direction of force -> Perpendicular to magnetic field and current
=Fleming’s left-hand rule -> Determines force direction
=Magnetic field strength -> Proportional to magnetic field
=Length of conductor in magnetic field -> Increases the force
=Current direction reversed -> Reverses the force direction
}


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