A threaded rod with `12 turns//cm` and diameter `1.18 cm` is mounted horizontally. A bar with a threaded hole to match the rod is screwed onto the rod. The bar spins at `216 rev//min`. How long will it take for the bar to move `1.50 cm` along the rod ?

A threaded rod with 12 turns//cm and diameter 1.18 cm is mounted horizontal. A bar with a threaded hole to match the rod is screwed onto the rod. The bar spins at 216 rev//min . How long will it take for the bar to move 1.50 cm along the rod ?

An iron rod of length 20 cm and diameter 1 cm is placed inside a solenoid on which the number of turns is 600.The relative permeability of the rod is 1000.If a current of 0.5 A ios placed in the solenoid,then magnetisation of the rod will be

A brass rod of length 50 cm and diameter 3.0 mm is joined to a steel rod of the same length and diameter. What is the change in length of the combined rod at 250^(@)C , if the original lengths are at 40.0^(@)C ? Is there a 'thermal stress' developed at the junction ? The ends of the rod are free to expand. Coefficient of linear expansion of brass = 2.0 xx 10^(-5).^(@)C^(-1) and that of steel =1.2 xx 10^(-5).^(@)C^(-1) .

An insulated container is filled with a mixture of water and ice at t_c = 0^@C . Another container is filled with water that is continuously boiling at t_h = 100^@C . In a series of experiments, the containers are connected by various thick rods that pass through the walls of the containers (see the diagram). The rod is insulated in such a way that there is no heat loss to surroundings. In experiment 1, a copper rod is used, and the ice melts in T_1 = 2 min. In experiment 2, a steel rod of the same cross section is used, and the ice melts in T_2 = 6 min. How long ( in min) would it take to melt the ice if the two rods are used "in series"?

A uniform bar of length 12 L and mass 48 m is supported horizontally on two smooth tables as shown in the figure. A small moth (an insect) of mass 8m is sitting on end A of the rod and a spider (an insect) of mass 16 m is sitting on the other end B . Both the insects start moving towards each other along the rod with moth moving at speed 2v and the spider at half of this speed. They meet at a point P on the rod and the spider eats the moth. After this the spider moves with a velocity v//2 relative to the rod towards the end A . The spider takes negligible time in eating the insect. Also, let v = L//T , where T is a constant having value 4 sec . The speed of the bar after the spider eats up the moth and moves towards A is

A copper rod of 1 cm diameter and 8 cm length is drawn into a wire of uniform diameter and 18 m length. The raidus (in cm) of the wire is

A copper rod of diameter 1 cm and length 8 cm is drawn in to a wire of length 18 m of uniform thickness. Find the thickness of wire.

A copper rod of diameter 1cm and length 8cm is drawn into a wire of length 18m of uniform thickness.Find the thickness of the wire.