Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

Can a hot-wire ammeter be used to measure a direct current having a constant value? Do we have to change the graduations?

Electric potential V in any field is constant. What can you say about the electric field E there?

A copper cube of mass 200g slides down on a rough inclined plane of inclination 37° at a constant speed. Assume that any loss in mechanical energy goes into the copper block as thermal energy. Find the increase in the temperature of the block as it slides down through 60cm. Specific heat capacity of copper = 420Jkg^-1 K^-1.

Answer the following questions:
Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher fields?

When the frequency of the AC source in an LCR circuit equals the resonant frequency, the reactance of the circuit is zero. Does it mean that there is no current through the inductor or the capacitor?

A variable frequency a.c source is connected to a capacitor. How will the displacement current change with decrease in frequency?

Name the characteristics of electromagnetic waves that:

1. Increases.
2. Remains constant.

In the electromagnetic spectrum as one moves from radio wave region towards ultraviolet region.

Can the peak voltage across the inductor be greater than the peak voltage of the source in an LCR circuit?

What is the effect on specific conductance of any electrolyte with increase in temperature?