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UNIT TEST REVIEW EMR
Test Description: EMR test review
Instructions: Answer all questions to get your test result.
1) What is the unit for frequency?
A
/s
B
cm/s
C
ν (nu)
D
Y
2) What is the SI unit for frequency?
A
Joules
B
m/s
C
HZ
D
Lambda
3) Longest wavelength will have
A
no frequency
B
high frequency
C
low frequency
D
steady frequency
4) Knocking off electron from a metal is called
A
photovoltiac effect
B
photosysynthesis
C
Photoelectric Effect
D
Dual Effect
5) If electrons in an atom have the lowest possible energies, then it is in
A
Static state
B
ground state
C
Excited state
D
Semi excited state
6) What is meant by frequency?
A
Oscillation /M
B
Oscillation of waves /s
C
Stationary Waves
D
Oscillation of waves/cm
7) A line spectrum is produced when an electron moves from higher energy level to a
A
into nucleus
B
Lower one
C
into proton
D
Higher one
8) Which of the following radiations is not a part of the EM spectrum
A
Radio waves
B
Xrays
C
Gamma Rays
D
Beta rays
9) What is the equation for calculating a wavelength?
A
(λ) = c/h
B
v= mv
C
λ = c / ν (nu)
D
E = hv
10) The energy of a photon or quantum is related to its
A
none of the above
B
frequency
C
wavelength
D
speed
*select an answer for all questions
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