Radiation and Dual Nature of Matter — Physics STD 12 Science — Question

Two charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field.

Which of the following quantities do not depend on the choice of zero potential or zero potential energy?

In a room containing air, heat can go from one place to another:

1. By conduction only.
2. By convection only.
3. By radiation only.
4. By all the three modes.

An AC voltmeter in an L - C - R circuit reads 30volt across resistance, 80 volt across inductance and 40 volt across capacitance. The value of applied voltage will be.

Select the correct statements. Coulomb’s law correctly describes the electric force that:
i. binds the electrons of an atom to its nucleus.
ii. binds the protons and neutrons in the nucleus of an atom.
iii. binds atoms together to form molecules.

Which of the following is true for number of spectral lines in going form Layman series to Pfund series(a) Increases(b) Decreases(c) Unchanged(d) May decreases or increases

The figure here gives the electric field of an EM wave at a certain poiunt and a certain instrant. the wave is transporting energy in the negative z direction. what is tha direction of the magnetic field of the wave at that point and instant.

An object approaches a convergent lens from the left of the lens with a uniform speed 5 m/s and stops at the focus. The image