Magnetism and Matter — Physics STD 12 Science — Question

An object is placed far away from all the objects that can exert force on it. A frame of reference is constructed by taking the origin and axes fixed in this object. Will the frame be necessarily inertial?

Who first of all gave experimental evidence of existence of electromagnetic waves?

In a P-N junction, what is the potential in the P-part near the junction plane?

Tell the value and nature of charge on the hole.

Is current density a scalar or a vector quantity?

When an AC source is connected to a capacitor there is a steady-state current in the circuit. Does it mean thatthe charges jump from one plate to the other to complete the circuit?

How does the junction plane behave in the case of reverse bias?

Write the relation between threshold frequency and work function.

What is the phase difference between voltage and current in a LCR series circuit at resonance?

If primary coil of a transformer is joined with a battery, then what will happen?