Force, Work, Power and Energy — Physics STD 10 — Question

What are the ultrasonic waves?

State expression for Resistance connected in parallel.

What is electromagnetic induction?

State two factors on which the strength of induced e. m.f. depends.

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

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.

Name two places in india where electricity is generated from nuclear power plants.

State the position of object, position of image, nature of image when: Convex lens is used as an erecting lens in terrestrial telescope.

How does a ray of light bend when it travels from rarer to denser medium

How does a magnetic field set up by a solenoid change when strength of current in the solenoid is decreased?