दुनिया गलतियां पहले देखती है! Another Choti Motivation by Magnet Brains #Shorts #Magnetbrains

A short bar magnet having magnetic moment 4 Am^2 , placed in a vibrating magnetometer, vibrates with a time period of 8 s. Another short bar magnet having a magnetic moment 8Am^2 vibrates with a time period of 6 s. If the moment of inertia of the second magnet is 9 xx 10^(-2) kgm^2 , the moment of inertia of the first magnet is (assuming that both magnets are kept in the same uniform magnetic induction field):

A short bar magnet X of magnetic moment M is placed horizontally with its magnetic moment directed from west to east. Another short magnet Y of magnetic moment (2)/(sqrt3) M is placed with its magnetic axis perpendicular to X and magnetic moment directed from north to south. Calculate the inclination of resultant magnetic field with the axis of X at a distance r from its prolonged axis.

A train travels the distance between stations P and Q at a speed of 126 km/h, while in the opposite direction it comes back at 90 km/h. Another train travels the same distance at the average speed of the first train. The time taken by the second train to travel 525 km is: एक ट्रेन 126 किमी/घंटा की चाल से स्टेशनों P और Q के बीच की दूरी तय करती है, जबकि विपरीत दिशा में यह 90 किमी/घंटा की चाल से वापस आती है। दूसरी ट्रेन पहले ट्रेन की औसत चाल से समान दूरी तय करती है। 525 किमी की यात्रा के लिए दूसरी ट्रेन द्वारा लिया गया समय है: