Q1
A moving charge produces:
📝 SolutionA moving charge produces both an electric field (due to charge) and a magnetic field (due to motion).
Q2
The force on a charge moving parallel to a magnetic field is:
📝 SolutionThe magnetic force $F = qvB\sin\theta$. When motion is parallel to the field, $\theta = 0$, so $F = 0$.
Q3
The magnetic force on a current-carrying conductor is given by:
📝 SolutionThe force on a current-carrying wire is $F = BIL\sin\theta$, where $\theta$ is the angle between current and field.
Q4
The device based on the magnetic effect of current that measures small currents is the:
📝 SolutionA galvanometer detects and measures small currents using the torque on a coil in a magnetic field.
Q5
The magnetic field at the centre of a circular current loop is directed:
📝 SolutionThe magnetic field at the centre of a circular loop is perpendicular to the plane of the loop (along its axis).
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Class 12 · Physics
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