Why audio signals cannot be transmitted directly?
1. The signal has more noise
2. The transmitting antenna length is very small to design
3. The signal cannot be amplified for distance communication
4. The transmitting antenna length is very large and impracticable
Radio waves travel through ________.
1. Electromagnetic waves
2. Water
3. Wires
4. Fiber optic cable
What is the full form of RADAR?
1. Radio and ranging
2. Radio range
3. Range detection radio
4. Radio Detection and Ranging
The functions of a radio receiver are _______.
1. Receive the incoming modulated carrier by antenna
2. Select the wanted signal and reject the unwanted signals and noise
3. Detection and amplification of the information signal from the carrier
4. All of the above
Suggest a possible communication channel for the transmission of a message signal that has a
bandwidth of 200kHz.
1. TV transmission
2. Optical fiber
3. AM radio
4. FM radio
What happens in a frequency modulated wave?
1. Frequency varies with time
2. Amplitude varies with time
3. Both frequency and amplitude vary with time
4. Both frequency and amplitude are constant
Which of the following is true about carrier signal?
1. Carrier signals have low frequency
2. Carrier signals have high frequency
3. Carrier signals are used to increase the wavelength of the signal
4. Carrier signals and message signals are the same
Which is the true statement about frequency deviation in frequency modulation?
1. Frequency deviation is proportional to carrier signal frequency
2. Frequency deviation is proportional to amplitude of carrier signal
3. Frequency deviation is proportional to modulating frequency
4. Frequency deviation is proportional to amplitude of modulating signal
A ________ determines the target range by measuring the round-trip time of a pulsed microwave
signal.
1. Pulse radar
2. Doppler radar
3. Cross section radar
4. None of the mentioned
The radiation emission process (emission of a proton at frequency) can occur in __________ ways.
1. Two
2. Three
3. Four
4. One
Which process gives the laser its special properties as an optical source?
1. Dispersion
2. Stimulated absorption
3. Spontaneous emission
4. Stimulated emission
An electronic device that converts energy from one form to another.
1. Capacitor
2. Transducer
3. Resistor
4. Potentiometer
Audio frequency range lies between ________.
1. 2 MHz to 20 MHz
2. 20 Hz to 20 KHz
3. 20 KHz to 200 KHz
4. 20 MHz to 200 MHz
The amount of frequency deviation in FM signal depends on ________.
1. Modulating frequency
2. Modulation Index
3. Amplitude of the modulating signal
4. Carrier frequency
Radar uses ____________ principle?
1. Echo
2. Refraction
3. Diversion
4. Intensification
What is the primary function of a robot?
1. To entertain people
2. To assist humans by performing tasks
3. To communicate with aliens
4. To control the weather
Which of the following components is essential for a robot to move?
1. Processor
2. Actuator
3. Sensor
4. Camera
What is the main role of sensors in a robot?
1. To process information
2. To gather data from the environment
3. To perform computations
4. To store energy
Which programming language is commonly used in robotics?
1. HTML
2. JavaScript
3. Python
4. CSS
What is the term for a robot's ability to make decisions and adapt to its environment?
1. Autonomy
2. Dexterity
3. Sturdiness
4. Simplicity