When a compass needle is held arbitrarily in any direction in earth's magnetic field, a couple acts on the needle. The force on north pole of needle is towards the north and force on south pole of the needle is towards south. These forces are equal in magnitude and opposite in direction. They from a couple, which rotates the compass needle and aligns it along north south direction. Once the alignment is complete, net force and net torque on the compass needle reduce to zero. Read the above passage and answer the following : (i) What is the origin of force and torque on the compass needle ? (ii) What values of life do you learn from this study ?

When a compass needle is held arbitrarily in any direction in earth's

1.	When a compass needle is held arbitrarily in any direction in earth's magnetic field, a couple acts on the needle. The force on north pole of needle is towards the north and force on south pole of the needle is towards south. These forces are equal in magnitude and opposite in direction. They from a couple, which rotates the compass needle and aligns it along north south direction. Once the alignment is complete, net force and net torque on the compass needle reduce to zero. Read the above passage and answer the following : (i) What is the origin of force and torque on the compass needle ? (ii) What values of life do you learn from this study ?
Answer» Solution :(i) Horizontal componentof earth's magnetic field is responsible for the force as well as torque on the compass needle. (ii) Once the compass needle alings itself ALONG the horizontal component of earth's magnetic field, the DEFLECTING forces and torque cases to act on the compass needle. In day to day life, when we GET aligned as per the wishes of four superiors (i.g., parents, teachers, bosses at work ), NOTHING is going to disturb US.