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Q1:Who invented the Radio ?
A) Mahlon Loomis. B) Marconi Guglielmo . C) Lee De Forest D) Edwin Armstrong
Q2: The AM waves crated by?
A) Mahlon Loomis. B) Marconi Guglielmo . C) Lee De Forest D) Edwin Armstrong
Q3: Edwin Armstrong invented the …… .
A) AM waves B) FM waves C) Wireless Telegraphy D) Radio
Q4: …………. Was in 1906 .
A)Radio invention . B) The Invention of the FM Waves . C) The First Radio Broadcast.
D) The Invention of the AM Waves
Q1: what is the modulation?
A) The act of modifying the carrier frequency according to the information being sent.
B) The act of transmitting the wave through the antenna.
C) The act of modifying the information being sent according to the carrier frequency.
D) A special way to receive the signal through the antenna.
Answer: A
Q2: Why do we need the envelope detector?
A) To choose between different radio stations.
B) To separate the original wave from the modulated wave.
C) To control the volume of the speaker.
D) To strength the weak wave frequency.
Answer: B
Q3: What does AM stand for?
A) Amplitude Modulation.
B) Amplifying Mixers.
C) Anti Modulation.
D) Amplitude Mixers.
Answer: A
Q4: which type of modulation has better sound quality?
a) FM
b) AM
c) FM/AM
d) Both don not have a good sound quality
Answer: A
1)We can measure the resolution of a camera by
pixels
2)one of the main component of the camera is:
Sensor
3)the concept about the camera depend on :
Light
4)what type of information does the camera read?
Digital
1) CMOS (complementary metal-oxide semiconductor ) image sensor has :
Low image quality ,long battery life .
2) in CCD (charge-coupled device) :
the charge transported across the chip.
3) The mirrorless interchangeable-lens camera (MILC) gives us:
smaller size and lighter cameras
4) Compact cameras has :
small sensors and a fixed lens
Q 1- Each photosite is colorblind. In order to get a full color image, most sensors use …………. to look at the light in its three primary colors.
1-filtering
Q 2- The …………. focuses the image onto the digital sensor, where it is captured for storage.
1-lens
Q 3- Instead of film, a digital camera has a ……… that converts light into electrical charges.
1-sensor
Q 4- The sensor transforms light from the lens to the form of …………… information
1- digital
All answers are a)
1) The man who invented the AM signal is:
a) Lee De Frost
b) Mahlon Loomis
c) Marconi Guglielmo
d) Edwin Armstrong
2) In the radio, the mixer’s purpose is to:
a) Combine two signals together
b) Amplify the signal
c) Produce the carrier signal
d) Separate two signals
3) In the radio, the detector’s purpose is to:
a) Separate two signals
b) Amplify the signal
c) Produce the carrier signal
d) Combine two signals together
4) Which one of these is a characteristic of FM singal:
a) Can NOT be transmitted over long distances
b) It is affected by electrical storms
c) Can travel long distances
d) Is acquired by changing the amplitude
Each GPS satellite transmits signal that indicates its
A, location and time c, direction and acceleration
B, mass , size and time d, velocity and acceleration
Speed of the transmitted signal is equal to
A, speed of sound c, speed of light
B, 10000 m\s d, 90 km\s
How many imaginary spheres are required to locate the GPS user
A, 5 c, 1
B, 2 d, 3
The 4th satellite in determining the position is needed to correct
A, signal c, frequency
B, time d, altitude
When comparing Resistive touchscreen to capacitive touchscreen we can say that the resistive is :
a) Cheaper
b) Clearer
c) Highly sensitive
d) None of the above
On multi touch support:
a) Only resistive
b) Only capacitive
c) None of them
d) Both of them
The touch calculation in capacitive screens is done by
a) One sensor
b) Two sensors
c) Three sensors
d) Four sensors
Indium tin oxide (ITO) used in touchscreens is :
a) Flexible
b) Cheap
c) Insulator
d) Transparent
1-Factor that held the Analog Electronic Camera?
(a)[cost].(b)good image quality.(c)hard to use.(d)B and C
2-what is the colors that the sensor get from filtering?
(a)black and white. (b)red,blue and yellow.(c)red,blue and green] . (d)red,yellow and green.
3-who invent first digital camera?
(a)Steven William. (b)steven sasson]. (c)Vidal Sasson. (d)Vidal Hazelton.
4-What part of Camera that transforms light to digital information?
(a)Shutter. (b)Aperture. (c)View Finder. (d)[sensor].
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