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Two identical trains take 3 sec to pass one another when going in the opposite direction but only 2.5 sec if the speed of one is increased by 50%. The time one would take to pass the other when going in the same direction at their original speed is
18
Oct
Two identical trains take 3 sec to pass one another when going in the opposite direction but only 2.5 sec if the speed of one is increased by 50%. The time one would take to pass the other when going in the same direction at their original speed is A particle starts from rest with [...]
A small rod of bismuth is suspended freely between the poles of a strong electromagnet. It is found to arrange itself at right angles to the magnetic field . This observation established that bismuth is
18
Oct
A small rod of bismuth is suspended freely between the poles of a strong electromagnet. It is found to arrange itself at right angles to the magnetic field . This observation established that bismuth is The magnet of a vibration magnetometer is heated so as to reduce its magnetic moment by 36 %. By doing [...]
A current carryingcoil is placed with its axis perpendicular to N-S direction. Let horizontal component of earth’s magnetic field be H0 and magnetic field inside the loop is H. If a magnet is suspended inside the loop, it makes angle θ with H. Then θ=
18
Oct
A current carryingcoil is placed with its axis perpendicular to N-S direction. Let horizontal component of earth’s magnetic field be H0 and magnetic field inside the loop is H. If a magnet is suspended inside the loop, it makes angle θ with H. Then θ= The magnet of a vibration magnetometer is heated so as [...]
A bar magnet is held perpendicular to a uniform magnetic field. If the couple acting on the magnet is to be havled by rotating it , then the angle by which itis to be rotated is
18
Oct
A bar magnet is held perpendicular to a uniform magnetic field. If the couple acting on the magnet is to be havled by rotating it , then the angle by which itis to be rotated is A bar magnet is held perpendicular to a uniform magnetic field. If the couple acting on the magnet is [...]
Two similar bar magnets P and Q , each of magnetic moment M are taken . If P is cut along its axial line and Q is cut along its equatorial line, all the four pieces obtained have
18
Oct
Two similar bar magnets P and Q , each of magnetic moment M are taken . If P is cut along its axial line and Q is cut along its equatorial line, all the four pieces obtained have all the four pieces obtained have each of magnetic moment M are taken . If P is [...]
To cross the river in shortest distance, a swimmer should swimming an angle `theta with the upsteram. What is the ratio of the time taken to swim across in the shortest time to that in swimming across over shortest distance. [Assume that the speed of swimmer in still water is greater than the speed of river flow]
18
Oct
To cross the river in shortest distance, a swimmer should swimming an angle `theta with the upsteram. What is the ratio of the time taken to swim across in the shortest time to that in swimming across over shortest distance. [Assume that the speed of swimmer in still water is greater than the speed of [...]
A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60 degree. THe torque required to maintain the needle in its position will be
18
Oct
A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60 degree. THe torque required to maintain the needle in its position will be A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60 degree. THe torque required [...]
The magnet of a vibration magnetometer is heated so as to reduce its magnetic moment by 36 %. By doing this the period time of the magnetometer will
18
Oct
The magnet of a vibration magnetometer is heated so as to reduce its magnetic moment by 36 %. By doing this the period time of the magnetometer will The magnet of a vibration magnetometer is heated so as to reduce its magnetic moment by 36 %. By doing this the period time of the magnetometer [...]
A bar magnet has coercivity 4 × 10^3 A/m. It is desired to demagnetise it by inserting it inside a solenoid 12cm long and having 60 turns. The current that should be sent through the solenoid is
18
Oct
A bar magnet has coercivity 4 × 10^3 A/m. It is desired to demagnetise it by inserting it inside a solenoid 12cm long and having 60 turns. The current that should be sent through the solenoid is A bar magnet has coercivity 4 × 10^3 A/m. It is desired to demagnetise it by inserting it [...]
The area of hysteresis loop of a material is equinalent to 250 joule. When 10 kg material is magnetised by an alternating field of 50 Hz then energy lost in one hour will be if the density of material is 7.5 gm/cm^2
18
Oct
The area of hysteresis loop of a material is equinalent to 250 joule. When 10 kg material is magnetised by an alternating field of 50 Hz then energy lost in one hour will be if the density of material is 7.5 gm/cm^2 the apparent dip will be given tanδ1 which is equal to: the axis [...]