22 solutions available
Question 1Which of the following correctly describes the magnetic field near a long straight wire?The field consists of straight lines perpendicular...
Question 2At the time of short circuit, the current in the circuitreduces substantially.does not change.increases heavily.vary continuously.
Question 3State whether the following statements are true or false.(a) The field at the center of a long circular coil carrying current will be...
Question 4List two methods of producing magnetic fields.
Question 5When is the force experienced by a current–carrying conductor placed in a magnetic field largest?
Question 6Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the...
Question 7State the rule to determine the direction of a(i) magnetic field produced around a straight conductor carrying current,(ii) force...
Question 8When does an electric short circuit occur?
Question 9What is the function of an earth wire? Why is it necessary to earth metallic appliances?
Question 1Why does a compass needle get deflected when brought near a bar magnet?
Question 1Draw magnetic field lines around a bar magnet.
Question 2List the properties of magnetic field lines.
Question 3Why don't two magnetic field lines intersect each other?
Question 1Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand...
Question 2The magnetic field in a given region is uniform. Draw a diagram to represent it.
Question 3Choose the correct option.The magnetic field inside a long straight solenoid-carrying currentis zero.decreases as we move towards its...
Question 1Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct...
Question 2In 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...
Question 3A positively-charged particle (alpha-particle) projected towards the west is deflected towards north by a magnetic field. The direction of...
Question 1Name two safety measures commonly used in electric circuits and appliances.
Question 2An 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...
Question 3What precaution should be taken to avoid the overloading of domestic electric circuits?