NEET Physics MCQs

Two coherent point sources S1 and S2, emitting light of wavelength λ, are placed a distance 'd' apart. A screen is placed at a distance 'D' from the sources (D >> d). If the path difference at a point P on the screen is given by $d sinθ = nλ + λ/4$, where $θ$ is the angle between the line connecting the sources and the line from the midpoint between the sources to P, and 'n' is an integer, what is the intensity at P relative to the maximum intensity $I_0$?

Which of the following represents the phase difference between two points on a wave separated by a distance of one wavelength?

In YDSE, the phase difference corresponding to the central bright fringe is:

A wave has a frequency of 500 Hz and a wavelength of 0.66 m. What is the phase difference between two points separated by 0.22 m?

An AC circuit with a non-ohmic resistive element has a current described by $i(t) = 5\sin(\omega t + \pi/3)$. If the voltage across the element is $v(t) = 10\sin(\omega t)$, which statement BEST describes the relationship between instantaneous power, average power, and RMS power?

An AC circuit has a voltage $v(t) = 100\sin(100\pi t)$ and current $i(t) = 5\sin(100\pi t - \pi/3)$. What is the average power dissipated in the circuit?

Two waves traveling in the same direction are described by $y_1 = A\sin(kx - \omega t)$ and $y_2 = A\sin(kx - \omega t + \frac{\pi}{3})$. What is the amplitude of the resultant wave?

A sound wave of frequency 500 Hz travels in air with a speed of 340 m/s. What is the phase difference between two points on the wave that are 0.2 m apart?

In a series R-C circuit, the voltage across the capacitor lags the current by $\frac{\pi}{2}$. If the frequency of the source is doubled, the phase difference between the voltage across the capacitor and the current will:

In a series R-L circuit, the voltage across the inductor leads the current by $\frac{\pi}{2}$. If a capacitor is added in series such that the circuit resonates, the phase difference between the source voltage and the current will be: