Question Answers

A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is [Latent heat of ice is 3.4 × 10^5J/kg and g = 10N/kg]: A [...]

An insect of mass m moves up along a hanging stationary thread, with acceleration a. Find the power delivered by the gravity after a time t. An insect of mass m moves up along a hanging stationary thread with acceleration a. Find the power delivered by the gravity after a time t. August 31, 2020 [...]

a charge particle q = -10 mu is carried along op pq and then back to o along qo as shown in figure in an electric field E = ( x +2y )i +2xj . find the work done by an external agent in (a) each path and (b) the round trip. 2) to Q(3 [...]

When a string is divided into three segments of lengths l1​, l2​, and l3​, the fundamental frequencies of these three segments are v1​,v2 ​and v3​, respectively. The original fundamental frequency (v) of the string is and l3​ l2 respectively. The original fundamental frequency (v) of the string is the fundamental frequencies of these three segments [...]

If n1​,n2​ and n3​ are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency n of the string is given by If n1​ n2​ and n3​ are the fundamental frequencies of three segments into which a string is divided then the original fundamental frequency n of the [...]

A block is tied to one end of a light string of length 1 whose other end is fixed to a rigid support. The block is given a speed of sqrt(7gl/2) from the lowermost position. Find the height and speed at which the block leaves the circle. Also find the maximum height to which it [...]

Find the work done by an external agent in slowly shifting a charge q=1μC in the electric field → E =103 ˆ i V m^-1 from the point P(1,2) to Q(3,4). 2) to Q(3 4 Find the work done by an external agent in slowly shifting a charge q=1μC in the electric field → E [...]

A string is stretched between fixed points separated by 75.0cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is A string is stretched between fixed points separated by 75.0cm. It is observed to [...]

A point mass m starts from rest and slides down the surface of a frictionless hemisphere of radius r as shown figure. Measure angle from the vertical and potential energy from the top. Find a. Find the changes in potential energy of the mass with angle b. Find the kinetic energy as a function of [...]

Surface tension of a soap solution is T. There is a soap bubble of radius r. Calculate the amount of charge that must be spread uniformly on its surface so that its radius becomes 2r. Atmospheric pressure is P0. Assume that air temperature inside the bubble remains constant. ……….. Qn respectively. i. Find the charge [...]