Electro Woves - DANYAL`S NOTES AND RESOURCES

Danyal Education
Electromagnetic Spectrum Assignment 4 (Pure)
Unil
l4 I Electrcmagn*trc Woves 127
tic
Electro
Woves
For each of the questions, there are four possible choices.
Ghoose the one you consider corect and record your choice.
g\V 9.
Which electromagnetic wave comes after violet colour in
ascending sequence of frequency?
d 2.
d 3.
d 4.
Which of the following has the shortest wavelength?
A
waves
B visible light
C microwaves D X-rays
A
waves
C ultravrolet rays
radio
(
A
B
D X-rays
A
(
waves
infra-red
B visible light
radiation D X-rays
ya
B
g .
7
B Transmitting communication signals
C Heating food
D Killing cancerous cells
(
U
(
B
green
D violet
,
r.
*n,rn
1.
2.
3.
A
C
)
()
of the following uses microwaves?
oven
mobile phone
metal detector
land2only
2and3only
B l and3only
D 1,2and3
()
)
U 13. Which of the following uses infra-red radiation?
(
)
Which colour comes immediately after green in the ascending
order of frequency?
A red
C blue
U B.
green
D violet
(
0 11. Which of the following uses radio waves?
A Detecting fake notes
Which colour comes after blue in the descending order of
A red
C yellow
radiation B visible light
ray
D X-ray
infrared
ultraviolet
)
Which of the following waves come after white light in the
descending order of wavelengths?
wavelengths?
)
t\/
infra-red radiation B ultraviolet rays
C microwaves D radio waves (
M
C
Which of the following has the lowest frequency?
radio
(
ascending sequence of wavelength?
gamma rays
ultraviolet rays
B visible light
C microwaves D X-rays
A
radiation B visible light
ray
D X-ray
infrared
ultraviolet
g\, 10. Which electromagnetic wave comes after red colour in
Which of the following has the highest frequency?
A
U 6.
C
Which of the following has the longest wavelength?
C
g\\, 5.
radio
Da
n
I
A
l E
du
ca
tio
n
d,
(
)
2.
3.
Transferring thermal energy from a high temperature
region to a low temperature region.
Remote control.
Killing cancerous cells.
A land2only
C 2and3only
B land3only
D 1,2and3 (
)
g\\, 14. Which of the following uses visible light?
1. Seeing objects with the naked eye.
2. Transferring thermal energy from a high temperature
region to a low temperature region.
Which of the following comes after green in the ascending
order of wavelength?
yellow 2. blue
3. red
A 'l and 2 only
B 2 and 3 only
C land3only
D 1,2and3 (
1.
3. Transmitting signals through optical fibres.
A land2only
C 2and3only
1.
)
B land3only
D 1,2and3 (
)
Theme4lwsves
2.
3.
Sun tanning
A
l and2only
2and3only
C
U
rays?
1. Radio waves
2. Visible light
3. Gamma ray
Sterilising
B l and3only
D 1,2and3
A
()
C
U 16. Which of the following uses X-rays?
1. Detecting flaws in metals
2. Detecting restricted objects in the luggage
3. Detecting bone fracture in human body
A land2only
C 2and3only
,
r.
*n,rn
1.
2.
3.
B land3only
D 1,2and3
'1
and 2 only
(
)
U 23. What is the speed of X-ray in a vacuum?
A
B
C
D
()
300 m s-l
3x108ms-t
Slightly greater than 3 x 108 m sr
Slightly less than 3 x 108 m s-l
()
U 24. What is the speed of X-ray in air?
of the following uses gamma rays?
A
B
Sterilising
Killing cancerous cells
Detecting flaws in metals
A land2only
C 2and3only
B3 on ly
D1 2and3
1 only
C
D
B
1 and 3 only
D
1,2 and
3
300 m/s
3 x 108 m/s
Slightly greater than 3 x 108 m/s
Slightly lesser than 3 x 108 m/s
uc
U
rr. *n,rn of the following waves can burn living cells?
n
U , u. *n'rtr of the following uses ultraviolet
1. Detecting fake notes
at
io
128
()
()
M
0 25. Which of thefollowing
is/arethe properties of electromagnetic
waves?
U 18. Which of the following
is true about the beach volleyball
1
2.
3.
1. He feels hot because of infrared radiation from the sun.
2. He gets tanned because of the ultraviolet rays from the
SUN.
3.
eye.
B land3only
D 1,2and3 (
)
U 26. Which of the following
0
ny
M
B 3only
D 2and3only
(
Da
A lonly
C land3only
)
1 only
v
27
.
v 28.
D2 and 3 only
U 2'1. Which of the following waves can ionise living cells?
(
)
B 3.0x108m
D 7.8x108m (
)
[Vicrowave is used in speed camera to help traffic police
detect the speed of a car. The speed camera is placed behind
the car and takes two shots at the car at an interval of 0.7
second.
Given that the trme for the first shot to reflect back is 3.3 x
10{ s and the second took 3.5 x'10i s, calculate the speed
of the car in km/h.
1. Ultraviolet ray
2. X-ray
3. Gamma ray
A 2only
C 2and3only
B 2and3only
D 1,2and3
Aradar station sends out a pulse oJ microwave to the moon
and the signal returns in 2.6 seconds. Calculate the distance
between the Earth and the moon.
A 1.9x108m
C 3.9x'108m
B3 only
)
are the properties of electromagnetic
A land2only
C land3only
1. Heating
2. Cooling
3. lonising
C l and3only
(
2.
3.
ZO. Wf,at is the possible effect of X-ray on human cell?
A
2only
D 1,2and3
.
0 t g. Wtrat is the possible effect of radio waves on human cell?
1. Heating
2. Cooling
3. lonising
B
waves?
'1
All electromagnetic waves can be reflected and refracted.
Allelectromagnetic waves carry energy.
All electromagnetic waves carry charges.
al
\\,
All electromagnetic waves have a speed of 3 x 1 08 m s 1.
All electromagnetic waves are transverse waves.
All electromagnetic waves can be seen with the naked
A lonly
C land2only
He can see because of the visible light from the sun.
A land2only
C 2and3only
.
Ed
player?
B 3only
D 1,2and3
A
(
C
108
216
km/h
km/h
B
D
154 km/h
308
km/h
(
)
Unit 14
gM 29. Given that the wavelength of infrared radiation is 2 x 10{ m
U 36. Which of the following shows the relationship between the
in vacuum, calculate the frequency of this infrared radiation.
A 6.7x10iaHz
C 3x10BHz
U 30.
B 2x105Hz
D 1.5x10r3H2 (
speed and the wavelength of the electromagnetic waves in
vacuum?
A speed
)
B
3x10{m
D 3x108m
(
B 6.17 x 1012 Hz
D 1.62 x Hz (
'1013
f
)
2.31x 10r
m
B 2.46 x 10 m
D 3.51 x107m (
(
)
requency and the wavelength of the electromagnetic waves?
A frequency
The refractive indexof thecoreandthecladding of an optical
fibre is '1.62 and 1.52 respectively. Violet light of frequency
8 x 'l0ra Hz travels from the core to the cladding. Calculate
the wavelength of violet light in the cladding.
A
wavelength
U 37. Which of the following shows the relationship between the
l E
du
v 33.
B 4.62x10'm
D B.23x10sm (
ca
A 2.85x107m
C 1.49x10rm
D
wavelength
)
Red light travels in optical fibre with a refractive index of
1 .62. Given that the frequency of a light source is 4 x 1 0ra Hz,
calculate the wavelength of this light ray.
speed
wavelength
tio
n
A light ray has a frequency of 1 x 1013 Hz in vacuum. Calculate
the frequency of the light ray travelling in a piece of optical
fibre with a refractive index of 1.62.
A 3.00 x 10{ Hz
C 1.00 x 1013 Hz
/
speed
wavelength
)
f,
v 32.
$
Given that the frequency of radio wave is 1 Hz in vacuum,
calculate the wavelength of this radio wave.
A 3x10am
C 1x10om
W 31 .
I Electronrcgnelic Wcves 129
$
frequency
wavelength
wavelength
7
C 2.62x10rm
f,
)
I
frequency
frequency
EXTENSION QUESTIONS
ya
IM 34. Which of the following statements is true about all
wavelength
wavelength
(
electromagnetic waves?
A They can be detected by a radio aerlal.
B They travel at 3 x 108 m s-1.
Da
n
C 0nly sound wave requires a medium to travel.
D They obey the law of reflection and refraction. (
U 35. Which of the following
W 38.
)
)
Which of the following shows the relationship between the
energy and the wavelength of the electromagnetic waves?
A
$
energy
energy
statements is true about all
electromagnetic waves?
A They can be blocked by solid objects.
B They cannot be blocked by solid objects.
C
D
They carry charges.
The wave equation v
electromagnetic
wavelensth
= fly can be applied to any of the
waves.
(
)
f,
wavelength
!
energy
wavelength
energy
wavelength
(
)