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MCQ Questions for CBSE Class 12 with Answers
MCQ Questions for CBSE Class 11 with Answers
MCQ Questions for CBSE Class 10 with Answers
MCQ Questions for CBSE Class 9 with Answers
MCQ Questions for CBSE Class 8 with Answers
MCQ Questions for CBSE Class 7 with Answers
MCQ Questions for CBSE Class 6 with Answers
MCQ Questions for CBSE Class 5 with Answers
MCQ Questions for CBSE Class 4 with Answers
MCQ Questions for CBSE Class 3 with Answers
MCQ Questions for CBSE Class 2 with Answers
MCQ Questions for CBSE Class 1 with Answers
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Oscillations and Waves Gate & PSU MCQ Questions With Answers
1.
1 db is equal to
Factor of 1000 in intensity
Factor of 1.26 in intensity
Factor of 102.610^{2.6}102.6 in intensity
Factor of 10 in intensity
2.
A wave traveling at 340. m/s with a wavelength of 7.65 m will have a frequency of _____.
44.4 Hz
0.0225 Hz
2,601 Hz
none of these
3.
A solid sphere of mass 4kg and radius 0.05 m is suspended from a wire. What is the period of oscillation, if the torque required to twist the wire is 4×10−34\times10^{-3}4×10−3 N-m/rad
6.28 sec
3.14 sec
9.8 sec
1.57 sec
4.
In simple harmonic motion (SHM), the displacement x(t) of a particle from its equilibrium position is described by the equation of?
x = xm cos(ωt - ϕ)
x = xm cos(ωt - 2ϕ)
x = xm cos(ωt + 2ϕ)
x = xm cos(ωt + ϕ)
x = xm cos(2ωt + ϕ)
5.
ω=kmω=\sqrt{\frac{k}{m}}ω=mk the aim of the above formula is to find?
distance
displacement
velocity
acceleration
angular frequency
6.
The period T is the time required for one complete oscillation or cycle, It is related to the frequency by?
T=2/F
T=1/F
T=3/F
T=4/F
T=2F
7.
F=−kxF=−kxF=−kx for the force acting on the block, the formula can now relate the spring constant k (a measure of the stiffness of the spring) to the mass of the block and the resulting angular frequency of what formula?
k=mω2k=mω^2k=mω2
k=mvk=\frac{m}{v}k=vm
k=ωmk=\frac{ω}{m}k=mω
m=kωm=kωm=kω
m=kω2m=kω^2m=kω2
8.
Time duration of a pulse is given by
Δν Δt≈1\Delta\nu\ \Delta t\approx1Δν Δt≈1
Δω Δt≈1\Delta\omega\ \Delta t\approx1Δω Δt≈1
Δν Δt≈2π\Delta\nu\ \Delta t\approx2\piΔν Δt≈2π
Δν Δt ≈h2π\Delta\nu\ \Delta t\ \approx\frac{h}{2\pi}Δν Δt ≈2πh
9.
Characteristic impedence is given by
T0ρ0T_0\rho_0T0ρ0
T0ρ0\frac{T_0}{\rho_0}ρ0T0
T0ρ0\sqrt{\frac{T_0}{\rho_0}}ρ0T0
ρ0T0\sqrt{\rho_0T_0}ρ0T0
10.
x=xmcos(ωt+ϕ)x=xm\cos(ωt+ϕ)x=xmcos(ωt+ϕ) What is xmxmxm in above equation stand for?
amplitude of the velocity
amplitude of the distance
amplitude of the displacement
distance of the amplitude
velocity of the amplitude
11.
The value of xmxmxm determines how far the particle moves in its oscillations and is called the amplitude of what?
oscillations
simple harmonic motion
freeze-frames
velocity
distance
12.
v=−ωxmsin(ωt+ϕ)v=−ωxm\sin(ωt+ϕ)v=−ωxmsin(ωt+ϕ) the aim of the above formula is to find?
distance
displacement
velocity
acceleration
angular velocity
13.
Group velocity is given by
dωdk\frac{\text{d}\omega}{\text{d}k}dkdω
ωk\frac{\omega}{k}kω
v0kv_0kv0k
T0ρ0\sqrt{\frac{T_0}{\rho_0}}ρ0T0
14.
The acceleration of a particle in SHM is:
always zero
always constant
maximum at amplitude
maximum at the equilibrium position
15.
Given equation of SHM, x=0.34 cos 3000t where x in mm and t in second. The frequency is:
3000 Hz
3000/2π Hz
0.74/2π Hz
3000/π Hz
16.
If the length of a simple pendulum is doubled, its period will:
halve
increase by a factor of sqrt(2)
decrease by a factor of sqrt(2)
double
17.
Refractive index is
sin isin r\frac{\sin\ i}{\sin\ r}sin rsin i
cμϵ\frac{c}{\sqrt{\mu\epsilon}}μϵc
μϵ\sqrt{\mu\epsilon}μϵ
vϕc\frac{v_{\phi}}{c}cvϕ
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