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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
Y
C
ν (nu)
D
cm/s
2) What is the SI unit for frequency?
A
HZ
B
Lambda
C
m/s
D
Joules
3) Longest wavelength will have
A
high frequency
B
no frequency
C
low frequency
D
steady frequency
4) Knocking off electron from a metal is called
A
Photoelectric Effect
B
photosysynthesis
C
photovoltiac effect
D
Dual Effect
5) If electrons in an atom have the lowest possible energies, then it is in
A
Excited state
B
Static state
C
ground 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 proton
B
Higher one
C
Lower one
D
into nucleus
8) Which of the following radiations is not a part of the EM spectrum
A
Xrays
B
Radio waves
C
Beta rays
D
Gamma Rays
9) What is the equation for calculating a wavelength?
A
λ = c / ν (nu)
B
v= mv
C
E = hv
D
(λ) = c/h
10) The energy of a photon or quantum is related to its
A
frequency
B
speed
C
wavelength
D
none of the above
*select an answer for all questions
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