Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
Object A, B and C, are three identical, insulated, spherical conductors. Originally, A and B have charges of +3 mC, whereas C has a charge of -6mC. Objects A and C are touched and moved apart, Objects B and C are touched before they moved apart. (i) If pbjects A and B are now held near each other they will (a) attract (b) repel (c ) have no effect on each other. (ii) If instead object A and C held near each other, they will (a) attract (b) repel (c ) have no effect on each other.
30
Aug
Object A, B and C, are three identical, insulated, spherical conductors. Originally, A and B have charges of +3 mC, whereas C has a charge of -6mC. Objects A and C are touched and moved apart, Objects B and C are touched before they moved apart. (i) If pbjects A and B are now held [...]
Let as consider the next case in the previous illustration when there is no friction between ground and M . The coefficient of static and kinetic friction are mu(2) and mu(1), respectively, and force F acts upper block as shown in figure a. What is the maximum possible value of F so that the system moves together ? b . If there is releative sliding between M and m then calculate acceleration of M and m
30
Aug
Let as consider the next case in the previous illustration when there is no friction between ground and M . The coefficient of static and kinetic friction are mu(2) and mu(1), respectively, and force F acts upper block as shown in figure a. What is the maximum possible value of F so that the system [...]
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find the static friction between the blocks. Make the necessary assumptions and discuss different cases. ,
Let as consider the next case in the previous illustration when there is no friction between ground and M . The coefficient of static and kinetic friction are mu(2) and mu(1) ,
respectively ,
Two blocks m 1 and m 2 are acted upon by the forces F 1 and f2 as shown in Fig. If there is no relative sliding between the blocks and the ground is smooth ,
If an object made of substance A is rubbed with an object made of substance B, then A becomes positively charged and B becomes negatively charged. If however, an object made of substance C, then A becomes negatively charged, What will happen if an object made of substance B is rubbed against an object made of substance C?
30
Aug
If an object made of substance A is rubbed with an object made of substance B, then A becomes positively charged and B becomes negatively charged. If however, an object made of substance C, then A becomes negatively charged, What will happen if an object made of substance B is rubbed against an object made [...]
A glass rod is rubbed with a silk cloth. The glass rod acquires a charge of +19.2×10−19C . (i) find the number of electrons lost by glass rod. (ii) Find the negative charge acquired by silk. (iii) Is there transfer of mass from glass to silk?
30
Aug
A glass rod is rubbed with a silk cloth. The glass rod acquires a charge of +19.2×10−19C . (i) find the number of electrons lost by glass rod. (ii) Find the negative charge acquired by silk. (iii) Is there transfer of mass from glass to silk? A sphere is dropped under gravity through a fluid [...]
Two blocks of masses M and m are arranged as shown in Fig. There is no friction between ground and block M. The coefficient of static and Kinetic friction between M and m are μs and μk respectively. a. Calculate the maximum possible value of F so that both the bodies move together. b. Find the accelerations of the blocks if F is greater than that found in part (a).
30
Aug
Two blocks of masses M and m are arranged as shown in Fig. There is no friction between ground and block M. The coefficient of static and Kinetic friction between M and m are μs and μk respectively. a. Calculate the maximum possible value of F so that both the bodies move together. [...]
viscous liquid of viscosity n is filled between an outer fixed cylinder as shown in the figure. the central sollid cylinder starts with angular velocity v0. find out the time after which the angular velocity becomes half.
30
Aug
viscous liquid of viscosity n is filled between an outer fixed cylinder as shown in the figure. the central sollid cylinder starts with angular velocity v0. find out the time after which the angular velocity becomes half. A sphere is dropped under gravity through a fluid of viscosity η . Taking the average ac celeration [...]
A sphere is dropped under gravity through a fluid of viscosity η . Taking the average ac celeration as half of the initial ac celeration, show that the time to attain the terminal velocity is independent of the fluid density.
30
Aug
A sphere is dropped under gravity through a fluid of viscosity η . Taking the average ac celeration as half of the initial ac celeration, show that the time to attain the terminal velocity is independent of the fluid density. A sphere is dropped under gravity through a fluid of viscosity η . Taking the [...]
A metallic sphere of radius 1.0 × 10^−3 m and density 1.0×104 kg/m^3 enters a tank of water, after a free fall through a distance of h in the earth’s gravitational field. If its velocity remains unchanged after entering water, determine the value of h . Given: coefficient of viscosity of water = 1.0 × 10^−3 Ns/m^2 , g = 10 ms^−12 and density of water = 1.0×103 kg/m^3 .
30
Aug
A metallic sphere of radius 1.0 × 10^−3 m and density 1.0×104 kg/m^3 enters a tank of water, after a free fall through a distance of h in the earth’s gravitational field. If its velocity remains unchanged after entering water, determine the value of h . Given: coefficient of viscosity of water = 1.0 × [...]
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A metallic sphere of radius 1.0 × 10^−3 m and density 1.0×104 kg/m^3 enters a tank of water ,
after a free fall through a distance of h in the earth's gravitational field. If its velocity remains unchanged after entering water ,
determine the value of h . Given: coefficient of viscosity of water = 1.0 × 10^−3 Ns/m^2 ,
g = 10 ms^−12 and density of water = 1.0×103 kg/m^3 . ,
A liquid having surface tension T and density ρ is in contact with a vertical solid wall. The liquid surface gets curved as shown in the figure. At the bottom the liquid surface is flat. The atmospheric pressure is Po . (i) Find the pressure in the liquid at the top of the meniscus (i.e. at A) (ii) Calculate the difference in height (h) between the bottom and top of the meniscus.
30
Aug
A liquid having surface tension T and density ρ is in contact with a vertical solid wall. The liquid surface gets curved as shown in the figure. At the bottom the liquid surface is flat. The atmospheric pressure is Po . (i) Find the pressure in the liquid at the top of the meniscus (i.e. [...]
A glass prism has its principal section in form of an equilateral triangle of side length l . The length of the prism is L (see fig.). The prism, with its base horizontal, is supported by a vertical spring of force constant k. Half the slant surface of the prism is submerged in water. Surface tension of water is T and contact angle between water and glass is 0∘ . Density of glass is d and that of water is ρ(<d) . Calculate the extension in the spring in this position of equilibrium.
30
Aug
A glass prism has its principal section in form of an equilateral triangle of side length l . The length of the prism is L (see fig.). The prism, with its base horizontal, is supported by a vertical spring of force constant k. Half the slant surface of the prism is submerged in water. Surface [...]