EXERCISE - 4A
V.K. Sally Physics Solutions for EXERCISE - 4A
Simple step-by-step solutions to EXERCISE - 4A questions of Magnetic Effects of Electric Current from Core Science Physics. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from EXERCISE - 4A with Hints & Solutions
Why is pure iron not used for making permanent magnets? Name one material used for making permanent magnets. Describe how permanent magnets are made electrically. State two examples of electrical instruments made by using permanent magnets.
What is a magnetic field? How can the direction of magnetic field lines at a place be determined?
State the rule for the direction of magnetic field produced around a current carrying conductor. Draw a sketch of pattern of field lines due to the current flowing through a straight conductor.
What is a solenoid? Draw a sketch of the pattern of field lines of magnetic field inside and outside the loop.
Consider a circular loop of wire. Let the current pass through the loop clockwise. Apply the right hand rule to find the direction of magnetic field inside and outside the loop.
Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it. Describe some salient features of magnetic lines of field concept.
With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current-carrying straight long conducting wire. How is the right-hand thumb rule useful to find the direction of the magnetic field associated with a current-carrying conductor?
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?
