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WorksheetsEngineering Physics
Total questions: 15
Worksheet time: 8mins
Which is NOT a characteristic of a LASER?
High intensity
unidirectional
White light
Coherent
Which of the following equation represents Simple Harmonic motion?
y=mx+c
x= a sin wt
y = Aebt
x= a (wt)
At resonance,
the natural frequency becomes equal to applied force frequency
The amplitude becomes maximum
damping becomes minimum
all the three options
Young's modulus of the material is defined as
Longitudinal strain/Longitudinal stress
Longitudinal stress/Longitudinal strain
Volume stress/ volume strain
linear strain/lateral strain
The concept of matter wave was suggested by_________
Heisenberg
Louis de Broglie
Schrodinger
Einstein
At 0 kelvin, all the energy levels below fermi level are
Completely empty
Completely filled
Partially filled
Half filled
The p-type semiconductor is obtained by doping the intrinsic semiconductor with
pentavalent impurities
bivalent impurities
trivalent impurities
any impurity atoms
Shockwaves propogate in
subsonic speeds
ultrasonic speeds
supersonic speeds
fastsonic speeds
The principle of optical fibers is
reflection
refraction
total internal reflection
dispersion
According to Heisenbergs uncertainty principle, which of the following is correct?
Δx.Δpx ≥4πh
Δx.Δpx≤4πh
Δx.Δpx≤2πh
Δx.Δpx=4πh
The electrons obey
Bose-Einstein statistics
Fermi-Dirac statistics
Maxwell -Boltzmann statistics
none of the above
How is population inversion achieved in Carbon dioxide laser?
optical pumping
by electrical discharge
chemical pumping
none of the above
the value of Poisson's ratio lies between
0 to 0.5
-1 to 0.5
-0.5 to 1
-0.5 to 0.5
electromagnetic waves are
longitudinal waves
pressure waves
supersonic waves
transverse waves
Which of the following is NOT a polarization mechanism in dielectric materials?
Electronic polarization
Space charge polarization
Ionic Polarization
Electrical polarization
