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

What is the value of electrical conductivity of a semiconductor at absolute zero?

On what factors is induced current in a coil depends?

Are electromagnetic waves transverse?

If the intensity of radiation in a photocell is increased how does the stopping potential vary?

Why should an ammeter have a low resistance?

A rectangular brick is kept on a table with a part of its length projecting out. It remains at rest if the length projected is slightly less than half the total length but it falls down if the length projected is slightly more than half the total length. Give reason.

Answer the following questions, which help you understand the difference between Thomson’s model and Rutherford’s model better.
Is the probability of backward scattering (i.e., scattering of α-particles at angles greater than 90°) predicted by Thomson’s model much less, about the same, or much greater than that predicted by Rutherford’s model?

The instantaneous current and voltage of an a.c. circuit are given by
i = 10 sin 300t A and v = 200 sin 300t V
What is the power dissipation in the circuit?