Mass = 10kg hanging, area of cross section `100 cm^2`, length 20cm, `y = 2 x 10^11`. Find total elongation.

A solenoid of length 20cm, area of cross- section 4.0 cm^2 and having 4000 turns is placed inside another solenoid of 2000 turns having a cross - sectional area 8.0cm ^2 and length 10 cm. Find the mutual inductance between the solenoids.

A unifrom steel rod of length 1m and area of cross-section 20 cm^(2) is hanging from a fixed support. Find the increases in the length of the rod.

Calculate the work done in stretching a steel wire of Young's modulus of 2 xx 10^(11) Nm^(-2) , mass of 40 kg, length of 200 cm and area of cross-section is 0.06 cm^(2)~ slowly applied without the elastic limit being reached.

A steel rod (Y = 2.0 xx 10^(11) N//m^(2) " and "alpha = 10^(-50).^(@)C^(-1)) of length 1 m and area of cross-section 1 cm^(2) is heated from 0.^(@)C to 200^(@)C , without being allowed to extend or bend. What is the tension produced in the rod?

A uniform heavy rod of weight 10 kg ms^(-2,) cross-sectional area 100 cm^(2) and length 20 cm is hanging from a fixed support. Young modulus of the material of the rod is 2 xx 10^(11) Nm^(-2) Neglecting the lateral contraction, find the elongation of rod due to its own weight:

For a toroid N = 500, radius = 40 cm, and area of cross section =10cm^(2) . Find inductance

A coil having 800 turns, area of cross section 12 cm^(2) and 15 cm long is connected in series with another coil having 500 turns, area of cross section 10 cm^(2) and 10 cm long. Calculate the net inductance of the system.

Three rods of same material, same area of cross section but different lengths 10 cm, 20 cm and 30 cm are connected at a point as shown. What is temperature of junction O?

What is the self - inductance of a solenoid of length 40 cm , area of cross - section 20 cm ^(2) and total number of turns 800 .