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Two identical balls each having a density ρ are suspended from as common point by two insulating strings of equal length. Both the balls have equal mass and charge. In equilibrium each string makes an angle θ with vertical. Now, both the balls are immersed in a liquid. As a result the angle θ does not change. The density of the liquid is σ . Find the dielectric constant of the liquid.
30
Aug
Two identical balls each having a density ρ are suspended from as common point by two insulating strings of equal length. Both the balls have equal mass and charge. In equilibrium each string makes an angle θ with vertical. Now, both the balls are immersed in a liquid. As a result the angle θ does [...]
A car of mass m moving over a convex bridge of radius r. Find the normal reaction acting on car when it is at the highest point of the bridge.
30
Aug
A car of mass m moving over a convex bridge of radius r. Find the normal reaction acting on car when it is at the highest point of the bridge. A car of mass m moving over a convex bridge of radius r. Find the normal reaction acting on car when it is at the [...]
Two identical small charged spheres, each having a mass m, hang in equilibrium as shown in fig. the ligth of each string is l, and the angle made by any string with the vertical is θ . Find the magnitude of the charge on each sphere.
30
Aug
Two identical small charged spheres, each having a mass m, hang in equilibrium as shown in fig. the ligth of each string is l, and the angle made by any string with the vertical is θ . Find the magnitude of the charge on each sphere. and the angle made by any string with the [...]
A block of mass m is kept on the edge of a horizontal turn table of radius R, which is rotating with constant angular velocity ω (along with the block) about its axis. If coefficient of friction is μ, find the friction force between block and table.
30
Aug
A block of mass m is kept on the edge of a horizontal turn table of radius R, which is rotating with constant angular velocity ω (along with the block) about its axis. If coefficient of friction is μ, find the friction force between block and table. A block of mass m is kept on [...]
Two identical He-filled spherical balloons each carrying a charge q are tied to a weight W with strings and float in equlibrium, as shown in figure. (i) Find the magnitude of q, assuming that the charge on each balloon acts as if it were concentrated at the center. (ii) Find the volume of each balloon. Take the density of He as ρHe and the density of air as ρa . Ignore the weight of the unfilled balloons .
30
Aug
Two identical He-filled spherical balloons each carrying a charge q are tied to a weight W with strings and float in equlibrium, as shown in figure. (i) Find the magnitude of q, assuming that the charge on each balloon acts as if it were concentrated at the center. (ii) Find the volume of each balloon. [...]
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and q3 ,
as shown in figure. (i) Find the magnitude of q ,
at the vertices of n equilateral triangle of side l. what is the force on a charge Q placed at the centroid of the triangle? ,
Consider three charges q1 ,
each equal to q ,
q2 ,
Two identical He-filled spherical balloons each carrying a charge q are tied to a weight W with strings and float in equlibrium ,
The ball of mass m moves with speed v against a smooth , fixed vertical circular groove of radius R kept on smooth horizontal surface find the a. normal reaction of the floor or the ball. b. normal reaction of the vertical wall on the ball.
30
Aug
The ball of mass m moves with speed v against a smooth , fixed vertical circular groove of radius R kept on smooth horizontal surface find the a. normal reaction of the floor or the ball. b. normal reaction of the vertical wall on the ball. fixed vertical circular groove of radius R kept on [...]
Point charge are placed at the verticas of a squre of side a as shown in fig. What should be the sign of charge q and magnitude of the ratio |q/Q| so that (i) net force on each Q is zero? (ii) net force on each q is zero? Is it possible that the entire system could be in electrostatic equilibrium?
30
Aug
Point charge are placed at the verticas of a squre of side a as shown in fig. What should be the sign of charge q and magnitude of the ratio |q/Q| so that (i) net force on each Q is zero? (ii) net force on each q is zero? Is it possible that the entire [...]
A block of mass 1 kg is tied to a string length 1m, the other end which is fixed. The block is moved on a smooth horizontal table with constant speed 10m/s . Find the tension in the string.
30
Aug
A block of mass 1 kg is tied to a string length 1m, the other end which is fixed. The block is moved on a smooth horizontal table with constant speed 10m/s . Find the tension in the string. A block of mass 1 kg is tied to a string length 1m the other end [...]
Consider three charges q1,q2, and q3, each equal to q, at the vertices of n equilateral triangle of side l. what is the force on a charge Q placed at the centroid of the triangle?
30
Aug
Consider three charges q1,q2, and q3, each equal to q, at the vertices of n equilateral triangle of side l. what is the force on a charge Q placed at the centroid of the triangle? and q3 at the vertices of n equilateral triangle of side l. what is the force on a charge Q [...]
A bar of mass m is placed on a triangular block of mass M as shown in Fig. The friction coefficient between the two surfaces is μ and ground is smooth. Find the minimum and maximum horizontal force F required to be applied on a block so that the bar will not slip on the inclined surface of block.
30
Aug
A bar of mass m is placed on a triangular block of mass M as shown in Fig. The friction coefficient between the two surfaces is μ and ground is smooth. Find the minimum and maximum horizontal force F required to be applied on a block so that the bar will not slip on the [...]
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and the pulleys frictionless .There is no friction between block B and the support table ,
B and C have masses m(A)= M and m(B) =m(C) = m. The strings are assumed maseless and unstreichable ,
but there is friction between blocks B and C ,
denoted by a given coefficient mu ,
Given the setup shown in Fig Block A ,