Atoms — Physics STD 12 Science — Question

What is the frequency of output signal of (i) Half wave rectifier (ii) Full wave rectifier, if the frequency of input signal is 50Hz?

When the skeleton of an elephant and the skeleton of a mouse are prepared in the same size, the bones of the elephant are shown thicker than those of the mouse. Explain why the bones of an elephant are thicker than proportionate. The bones are expected to withstand the stress due to the weight of the animal.

When a p-type impurity is doped in a semiconductor, a large number of holes are created. This does not make the semiconductor charged. But when holes diffluse from the p-side to the n-side in a p-n junction, the n-side gets positively charged. Explain.

A box is pushed through 4.0m across a floor offering 100N resistance. How much work is done by the resisting force?

A steady current is flowing in a cylindrical conductor. Does electric field exist within the conductor?

Whose wavelength is minimum among the following:Micro waves, Ultraviolet radiation and X-rays.

What effect does the dielectric medium have on the capacitance of a capacitor?

Can alternating galvanometer measure both alternating and direct currents?

If in a single slit diffraction experiment the width of the slit is doubled, what will be the effect on the central maximum?