Heat — Physics STD 10 — Question

Give one example where high specific heat capacity of water is used as heat reservoir ?

State the position of armature coil relative to the direction of magnetic field, in a D. C. motor when the deflecting couple acting an the coil is maximum.

State the energy changes which take place when:
Electricity obtained from nuclear energy.

Name the physical quantity which is measured in calorie. How is it related to the S.I. unit of the quality?

What is meant by internal resistance of a cell?

Write a relation between the angle of incidence (i), angle of emergence (e), angle of the prism (A), and angle of deviation (d) for a ray of light passing through an equilateral prism.

A ray of light is incident as a normal ray on the surface of separation of two different mediums. What is the value of the angle of incidence in this case?

What is meant by sound ranging?

A wave has wavelength 50Å of State its one use.

What is dynomo (a.c. generator)? State the principle on which it works.