Electric Charges and Fields — Physics STD 12 Science — Question

Two circular loops are placed with their centres separated by a fixed distance. How would you orient the loops to have:

1. The largest mutual inductance.
2. The smallest mutual inductance?

What is geometrical optics?

A metal block of density 6000kg m^-3 and mass 1.2kg is suspended through a spring of spring constant 200N m^-1. The spring-block system is dipped in water kept in a vessel. The water has a mass of 260g and the block is at a height 40cm above the bottom of the vessel. If the support to the spring is broken, what will be the rise in the temperature of the water. Specific heat capacity of the block is 250Jkg^-1 K^-1 and that of water is 4200Jkg^-1 K^-1. Heat capacities of the vessel and the spring are negligible.

When the size of a soap bubble is increased by pushing more air in it, the surface area increases. Does it mean that the average separation between the surface molecules is increased?

Name the crystal structure of intrinsic semiconductor.

Under what condition the force acting on a charge moving through a uniform magnetic field is minimum?

What is the relationship between the radius R of a nucleus and the mass number (A) of an atom?

How much work will be required to bring a test charge q, one em along the equatorial axis of an electric dipole?

In what condition does a charged particle moving through a magnetic field follow a circular path?