A current flowing in a wire always give rise to a ____________round it.
Hence, a current flowing in a wire always gives rise to a magnetic field around it.
Complete the following sentences : (a) When current flows in a wire, it creates ..... (b) On reversing the direction of current in a wire, the magnetic field produced by it gets ..... (c) A current carrying solenoid behaves like a ...... (d) A current carrying solenoid when freely suspended, it always rests in ....... direction.
What will happen to a compass needle when the compass is placed below a wire with needle parallel to it and a current is made to flow through the wire ? Give a reason to justify your answer.
we know current always flow from a body at high potential to a body to a low potential ,then why does AC current changes its direction?
In a electric circuit with a resistance wire and a cell, the current flowing is I. What would happen to this current if the wire is replaced by another thicker wire of the same material and same length? Give reason.