Question Answers
Sahay Sir > Question Answers
An elevator starts going up with an acceleration 2 m/s^2. If radius of the wheel attached to the elevator is 0.1 m, then find out number of revolutions in 10 s.
18
Oct
An elevator starts going up with an acceleration 2 m/s^2. If radius of the wheel attached to the elevator is 0.1 m, then find out number of revolutions in 10 s. An elevator starts going up with an acceleration 2 m/s^2. If radius of the wheel attached to the elevator is 0.1 m then find [...]
A communication satellite of 500 kg revolves around the earth in a circular orbit of radius 4.0×10^7 m in the equatorial plane of the earth from west to east. The magnitude of angular momentum of the satellite is
18
Oct
A communication satellite of 500 kg revolves around the earth in a circular orbit of radius 4.0×10^7 m in the equatorial plane of the earth from west to east. The magnitude of angular momentum of the satellite is A sphere of mass 10 kg and radius 0.5 m rotates about a tangent. The moment of [...]
A cylindrical cavity of diameter a exists inside a cylinder of diameter 2a as shown in the figure. Both the cylinder and the cavity are infinitity long. A uniform current density j flows along the length . If the magnitude of the magnetic field at the point P is given by N/12μ0aJ , then the value of N is
18
Oct
A cylindrical cavity of diameter a exists inside a cylinder of diameter 2a as shown in the figure. Both the cylinder and the cavity are infinitity long. A uniform current density j flows along the length . If the magnitude of the magnetic field at the point P is given by N/12μ0aJ , then the [...]
Six point charges , each of the same magnitude q, are arranged in different manners as shown in Column II . In each case, a point M and a line PQ passing through M are shown . Let E be the electric field and V be the electric potential at M (potential at infinity is zero ) due to the given charge distribution when it is at rest . Now, the whole system is set into rotation with a constant angular velocity about the line PQ . Let B be the magnetic field at M and μ be the magnetic moment of the system in this condition . Assume each rotating charge to be equivalent to a steady current .
18
Oct
Six point charges , each of the same magnitude q, are arranged in different manners as shown in Column II . In each case, a point M and a line PQ passing through M are shown . Let E be the electric field and V be the electric potential at M (potential at infinity is [...]
Two infinitely long straight wires lie in the xy plane along the lines x = +- R . THe wire located at x = +R carries a constant current I1 and the wire located at x = -R carries a constant current I2. A circular loop of radius R is suspended with its centre at ( 0, 0, root 3 R ) and in plane parallel to the xy plane. THis loop carries a constant current I in the clockwise direction as seen from above the loop.
18
Oct
Two infinitely long straight wires lie in the xy plane along the lines x = +- R . THe wire located at x = +R carries a constant current I1 and the wire located at x = -R carries a constant current I2. A circular loop of radius R is suspended with its centre at [...]
A wheel starts rotating from rest at time t=0 with a angular acceleration of 50 radians/s^2. The angular acceleration (α) decreases to zero value after 5 seconds. During this interval, α varies according to the question α = α0 (1− 5t) The angular velocity at T = 5s will be
18
Oct
A wheel starts rotating from rest at time t=0 with a angular acceleration of 50 radians/s^2. The angular acceleration (α) decreases to zero value after 5 seconds. During this interval, α varies according to the question α = α0 (1− 5t) The angular velocity at T = 5s will be A wheel starts rotating from [...]
A sphere of mass 10 kg and radius 0.5 m rotates about a tangent. The moment of inertia of the sphere is
18
Oct
A sphere of mass 10 kg and radius 0.5 m rotates about a tangent. The moment of inertia of the sphere is A sphere of mass 10 kg and radius 0.5 m rotates about a tangent. The moment of inertia of the sphere is October 18, 2020 Category: AIIMS Last 24 Years Solved 1996 - [...]
Three bodies, a ring, a solid cylinder and a solid sphere roll down the same inclined plane without slipping. They start from rest. The radii of the bodies are identical. Which of the bodies reaches the ground with maximum velocity?
18
Oct
Three bodies, a ring, a solid cylinder and a solid sphere roll down the same inclined plane without slipping. They start from rest. The radii of the bodies are identical. Which of the bodies reaches the ground with maximum velocity? A ring Given V CM = 2 m/s m = 2 kg R = 4 [...]
A child is standing with folded hands at the center of a platform rotating about its central axis. The kinetic energy of the system is K. The child now stretches his arms so that moment of inertia of the system doubles. The kinetic energy of the system now is:
18
Oct
A child is standing with folded hands at the center of a platform rotating about its central axis. The kinetic energy of the system is K. The child now stretches his arms so that moment of inertia of the system doubles. The kinetic energy of the system now is: Given V CM = 2 m/s [...]
Given that force (5i + 7j – 3k) N acts on a particle at position (i + j – k) m. Find torque of this force on the particle about origin.
18
Oct
Given that force (5i + 7j – 3k) N acts on a particle at position (i + j – k) m. Find torque of this force on the particle about origin. Given that force (5i + 7j - 3k) N acts on a particle at position (i + j - k) m. Find torque of [...]