Magnetic Effects of Electric Current
Class 10 · Science · 22 Questions
Why does a compass needle get deflected when brought near a bar magnet?
Draw magnetic field lines around a bar magnet.
List the properties of magnetic field lines.
Why don't two magnetic field lines intersect each other?
Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.
The magnetic field in a given region is uniform. Draw a diagram to represent it.
The magnetic field inside a long straight solenoid-carrying current
Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)
In Activity 12.7, how do we think the displacement of rod AB will be affected if (i) current in rod AB is increased; (ii) a stronger horse-shoe magnet is used; and (iii) length of the rod AB is increased?
A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is
Name two safety measures commonly used in electric circuits and appliances.
An electric oven of 2 kW power rating is operated in a domestic electric circuit (220 V) that has a current rating of 5 A. What result do you expect? Explain.
What precaution should be taken to avoid the overloading of domestic electric circuits?
Which of the following correctly describes the magnetic field near a long straight wire?
At the time of short circuit, the current in the circuit
State whether the following statements are true or false.
List two methods of producing magnetic fields.
When is the force experienced by a current–carrying conductor placed in a magnetic field largest?
Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?
State the rule to determine the direction of a (i) magnetic field produced around a straight conductor-carrying current, (ii) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it, and (iii) current induced in a coil due to its rotation in a magnetic field.