List of top Physics Questions on Waves asked in MET

Standing waves are formed on a string when interference occurs between two waves having
An open tank filled with water (density $\rho$) has a narrow hole at a depth of $h$ below the water surface. The velocity of water flowing out is
A stationary police car sounds a siren with a frequency of 990 Hz. If the speed of sound is 330 m/s, an observer, driving towards the car with a speed of 33 m/s, will hear a frequency of
The apparent frequency of the whistle of an engine changes in the ratio 9:8 as the engine passes a stationary observer. If the velocity of the sound is 340 m s\(^{-1}\), then the velocity of the engine is
In a gas, two waves of wavelengths 1 m and 1.01 m are superposed and produce 10 beats in 3 s. The velocity of sound in the medium is
A string of density \(7.5\) g cm\(^{-3}\) and area of cross-section \(0.2\) mm\(^2\) is stretched under a tension of 20 N. When it is plucked at the mid-point, the speed of the transverse wave on the wire is
Two springs are connected to a block of mass M placed on a frictionless surface. If both the springs have a spring constant k, then the frequency of oscillation of the block is:
If a wave travelling in positive x-direction with $A=0.2$ m, velocity $=360$ m/s and $λ=60$ m, then correct expression for the wave is:
Two junction diodes one of germanium (Ge) and other of silicon (Si) are connected as shown in figure to a battery of emf 12 V and a load resistance 10 k$Ω$. The germanium diode conducts at 0.3 V and silicon diode at 0.7 V. When a current flows in the circuit, then the potential of terminal Y will be
In photoelectric effect, the photo current
A block of wood of side 40 cm floats in water in such a way that its lower face is 5 cm below the free surface of water. What is the weight of the block?
An iron cube floats in a vessel containing mercury at $20^\circ C$. If the temperature is increased by $100^\circ C$, then the cube will float
If two waves represented by $y₁=4 \sin ω t$ and $y₂=3 \sin(ω t+\frac\pi3)$ interfere at a point. The amplitude of the resulting wave will be about
A string fixed at both ends oscillates in 5 segments, length 10 m and velocity of wave is 20 m/s. What is the frequency?