Question Answers
Sahay Sir > Question Answers
An iron rod of volume 10^−4 m^3 and relative permeability 1000 is placed inside a long solenoid wound with 5 turns/cm. If a current of 0⋅5 A is passed through the solenoid, find the magnetic moment of the rod.
18
Oct
An iron rod of volume 10^−4 m^3 and relative permeability 1000 is placed inside a long solenoid wound with 5 turns/cm. If a current of 0⋅5 A is passed through the solenoid, find the magnetic moment of the rod. An iron rod of volume 10^−4 m^3 and relative permeability 1000 is placed inside a long [...]
The dipole moment of each molecule of a paramagnetic gas is 1.5 × 10^−23 amp × m^2. The temperature of gas is 27∘ and the number of molecules per unit volume in it is 2 × 10^26 m^−3. The maximum possible intensity of magnetisation in the gas will be
18
Oct
The dipole moment of each molecule of a paramagnetic gas is 1.5 × 10^−23 amp × m^2. The temperature of gas is 27∘ and the number of molecules per unit volume in it is 2 × 10^26 m^−3. The maximum possible intensity of magnetisation in the gas will be the apparent dip will be given [...]
Two trains A and B ,100km apart are travelling towards each other on different tracks with same starting speed of 50km/h. The train A accelerates at 20 km/h^2 and the train B retards at the rate 20 km/h^2. The distance covered by the train A when they cross each other is
18
Oct
Two trains A and B ,100km apart are travelling towards each other on different tracks with same starting speed of 50km/h. The train A accelerates at 20 km/h^2 and the train B retards at the rate 20 km/h^2. The distance covered by the train A when they cross each other is A particle has a [...]
Shown in the figure are the velocity time graphs of the two particle P1 and P2 moving in same straight line in same direction. Which of the following statements about their relative motion is true?
18
Oct
Shown in the figure are the velocity time graphs of the two particle P1 and P2 moving in same straight line in same direction. Which of the following statements about their relative motion is true? Shown in the figure are the velocity time graphs of the two particle P1 and P2 moving in same straight [...]
A particle is thrown upwards from ground. It experiences a constant air resistance which can produce a retardation of 2 ms^−2 opposite to the direction of velocity of particle. The ratio of time of ascent to time of descent is (g= 10 m/s^2 )
18
Oct
A particle is thrown upwards from ground. It experiences a constant air resistance which can produce a retardation of 2 ms^−2 opposite to the direction of velocity of particle. The ratio of time of ascent to time of descent is (g= 10 m/s^2 ) A particle has a velocity u towards east at t=0. Its [...]
A balloon is moving upwards with velocity 10m/s. It releases a stone which comes down to the ground in 11s. The height of the balloon from the ground at the moment when the stone was dropped is (g=10m/s^2)
18
Oct
A balloon is moving upwards with velocity 10m/s. It releases a stone which comes down to the ground in 11s. The height of the balloon from the ground at the moment when the stone was dropped is (g=10m/s^2) A particle has a velocity u towards east at t=0. Its acceleration is towards west and is [...]
A particle starts from rest with uniform acceleration a. Its velocity after n second is v. The displacement of the body in the last two second is
18
Oct
A particle starts from rest with uniform acceleration a. Its velocity after n second is v. The displacement of the body in the last two second is A particle starts from rest with uniform acceleration a. Its velocity after n second is v. The displacement of the body in the last two second is October [...]
A stone is thrown vertically upwards with an initial speed u from the top of a tower, reaches the ground with a speed 3u. The height of the tower is :
18
Oct
A stone is thrown vertically upwards with an initial speed u from the top of a tower, reaches the ground with a speed 3u. The height of the tower is : A stone is thrown vertically upwards with an initial speed u from the top of a tower reaches the ground with a speed 3u. [...]
Two balls of equal masses are thrown upwards, along the same vertical direction at an interval of 2 seconds, with the same initial velocity of 40m/s. Then these collide at a height of (Take g=10m/s^2).
18
Oct
Two balls of equal masses are thrown upwards, along the same vertical direction at an interval of 2 seconds, with the same initial velocity of 40m/s. Then these collide at a height of (Take g=10m/s^2). along the same vertical direction at an interval of 2 seconds Two balls of equal masses are thrown upwards with [...]
Each atom of an iron bar (5 cm×1 cm×1 cm) has a magnetic moment 1.8 × 10^−23 Am^2 Knowing that the density of iron is 7.78 × 10^3 kg^−3 m atomic weight is 56 and Avogadro’s number is 6.02 × 10^23 the magnetic moment of bar in the state of magnetic saturation will be
18
Oct
Each atom of an iron bar (5 cm×1 cm×1 cm) has a magnetic moment 1.8 × 10^−23 Am^2 Knowing that the density of iron is 7.78 × 10^3 kg^−3 m atomic weight is 56 and Avogadro’s number is 6.02 × 10^23 the magnetic moment of bar in the state of magnetic saturation will be A [...]