Advertisements
Advertisements
Question
A magnet kept at the centre of two coils A and B is moved to and fro as shown in the diagram. The two galvanometers show deflection. State with a reason whether : x > y or x< y [x and y are magnitudes of deflection.]
Advertisements
Solution
∴ The number of turns in B is greater than in A.
∴ Deflection in B will be greater than deflection in A i.e. y > x.
APPEARS IN
RELATED QUESTIONS
The back face of a circular loop of wire is found to be south magnetic pole. The direction of current in this face of the circular loop of wire will be:
(a) towards south
(b) clockwise
(c) anticlockwise
(d) towards north
Draw a labelled diagram showing the three magnetic field lines of a loop carrying current. Mark the direction of current and the direction of magnetic field by arrows in your diagram.
What is the direction of magnetic field at the centre of a coil carrying current in the anticlockwise direction?
Explain with the help of the pattern of magnetic field lines the distribution of the magnetic field due to a current-carrying a circular loop.
Why is it that the magnetic field of a current-carrying coil having n turns, is ‘n’ times as large as that produced by a single turn (loop)?
State and illustrate the rule used for finding the polarity of the faces of a circular coil.
The nature of magnetic field line passing through the centre of current carrying circular loop is ____________.
Meena draws magnetic field lines of field close to the axis of a current carrying circular loop. As she moves away from the centre of the circular loop she observes that the lines keep on diverging.
How will you explain her observation.
Explain with the help of a labelled diagram the distribution of magnetic field due to a current through a circular loop. Why is it that if a current carrying coil has n turns the field produced at any point is n times as large as that produced by a single turn?
Explain the phenomenon of electromagnetic induction. Describe an experiment to show that a current is set up in a closed loop when an external magnetic field passing through the loop increases or decreases.
