Lakhmir Singh and Manjit Kaur Solutions for Chapter: Magnetic Effect of Electric Current, Exercise 10: Questions Based on High Order Thinking Skills (HOTS)

In the straight wire $A$, a current is flowing in the vertically downward direction whereas in wire $B$, the current is flowing in the vertically upward direction. What is the direction of the magnetic field in wire $A$?

(Choose from the following: Clockwise/ Anti-clockwise)

The figure shows a solenoid wound on a core of soft iron. Will the end A be a N pole or S pole when the current flows in the direction shown? 

For the coil in the diagram below, when the switch is pressed, what is the polarity of end A? (North Pole, South Pole)

A current flows downwards in a wire that passes vertically through a table top. Will the magnetic field lines around it go clockwise or anticlockwise when viewed from above the table?

The directions of current flowing in the coil of an electromagnet at its two ends $X$ and $Y$ are as shown below:

What is the polarity of end $X$? (South pole / North pole)

The magnetic field associated with a current-carrying straight conductor is in anticlockwise direction. If the conductor was held along the east-west direction, what will be the direction of current through it? Name and state the rule applied to determine the direction of current?

A current-carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor:

A thick wire is hanging from a wooden table. An anticlockwise magnetic field is to be produced around the wire by passing current through this wire by using a battery. Which terminal of the battery should be connected to the:

(a) top end of wire?

(b) bottom end of wire?

Give reason for your choice.