List of top Physics Questions on Electromagnetic Oscillations and Alternating Current

Current through ABC and A′B′C′ is I as shown in the given figure. If PB=PB′=r and C′B′PBC are collinear, the magnetic field at P is:

Match List-I with List-II.

List-I: Rule	List-II: Statement
(A) Ampere Swimming Rule	(I) Direction of induced current
(B) Fleming’s Left Hand Rule	(II) Direction of magnetic field lines due to current
(C) Fleming’s Right Hand Rule in straight conductor	(III) Direction of deflection of magnetic needle
(D) Right Hand Thumb Rule	(IV) Direction of force on a current-carrying conductor

Two identical coaxial coils P and Q carrying equal current in the same direction are brought nearer. The current in:

In the electromagnetic spectrum, ν1​, ν2​, and ν3​ respectively denote the frequencies of microwaves, ultraviolet waves, and gamma-rays. We can conclude that: