A bucket full of hot water is kept in a room. It cools from 75°C to 70°C in t1 minutes, from 70°C to 65°C in t2 minutes and from 65°C to 60°C in t3 minutes. Then
t1 < t2 < t3
t1 = t2 = t3
t1 < t2 > t3
t1 > t2 > t3
The equation of a transverse wave travelling along positive X-axis with amplitude 0.2 m, velocity 360 m/sec and wavelength 60 m can be written as
C.
Given, a = 0.2 metre
v = 360 m/s, λ = 60 metre
Equations of transverse wave travelling along positive x-axis.
If vm is the velocity of sound in moist air, vd is the velocity of sound in dry air, under identical conditions of pressure and temperature.
vm < vd
vm > vd
vmvd = 1
vm = vd
Two wires are fixed in a sonometer. Their tensions are in the ratio 8 : 1. The lengths are in the ratio 36 :35. The diameters are in the ratio 4 : 1. Densities of the materials are in the ratio 1 :2. If the higher frequency in the setting is 360 Hz, the beat frequency when the two wires are sounded together, is
8
5
10
6
A sound source is moving towards stationary listener with th of the speed of sound. The ratio of apparent to real frequency is
If v is the speed of sound in air, then the shortest length of the closed pipe which resonates to a frequency n, is
Cavitation is a special application property exhibited only by
ultrasonics
electromagnetic waves
audible sound
infrasonics
Waves that cannot be polarised are
electromagnetic waves
light waves
longitudinal waves
transverse waves
A charge q is placed at the centre of the line joining two equal point charges each equal to Q. The system of 3 charges will be in equilibrium if q is equal to