Sound — Physics STD 10 — Question

A coil is held in a magnetic field, such that plane of the coil is at right angles to that of the plane of permanent magnet. The force experienced by the coil on the passage of electric current will be:

Velocity of light is more in __________ than __________ .

The S1 unit of specific beat capacity is:

The maximum force required to open a nut by a spanner of length 50 cm producing a torque of 50 Nm is:

When a radioactive element ejects a beta particle its :

Assertion (A): If an atom undergoes a chemical change occurring at a low energy, there is a change in the number of orbital electrons of the atom.
Reason (R): If the atom undergoes a nuclear change which occurs at a high energy, there is a change in the number of nucleons inside the nucleus of the atom.

A heart of a rabbit beats 100 times in a minute when a fox chases it during which the work performed is 1.5 J . Find the power of the heart :

A point's potential is considered 1 volt when: