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