Physics Quiz on “ELECTRONIC DEVICE” Based on NCERT for SSC 2016

Q1. A diode can be used for-
(a) Amplification 
(b) Modulation 
(c) Detection 
(d) Rectification 

Q2. Which of the foolowing statement is/are correct for Antenna?
(a) It converts electric power into radio waves
(b) It is a transducer
(c) It converts radio waves into electric power
(d) All of the above

Q3. A diode as a rectifier converts-
(a) AC(alternate current) to DC(direct current)
(b) DC(direct current) to AC(alternate current)
(c) Varying dc into constant dc
(d) High voltage into low voltage and vice-versa 

Q4. In a transistor, the base is-
(a) An insulator 
(b) A conductor of low resistance 
(c) A conductor of high resistance 
(d) An extrinsic semiconductor 

Q5. In a transistor-
(a) Both the emitted and the collector are equally doped 
(b) Emitter is more heavily doped than the collector 
(c) The base is made very thin and is lightly doped
(d) (b) and (c)

Q6. Radio waves of constant amplitude can be generated with—
(a) Rectifier
(b) Filter
(c) Oscillator
(d) FET

Q7. In the use of transistor as an amplifier-
(a) The emitter-base junction is forward biased and the collector-base junction is reverse biased 
(b) Both the junctions are forward biased 
(c) Any of the two junctions may be forward biased 
(d) None of these 
Q8. Which of the following is/are transducer?
(a) Loudspeaker 
(b) Antenna
(c) Microphone 
(d) All of these 
Q9. In black and white televisions, pictures on the screen are produced due to bombardment of:
(a) X-ray photons on a white screen 
(b) X-ray photons on a white fluorescent screen 
(c) Electrons on a white screen 
(d) Electrons on a fluorescent white screen 

Q10. What is the difference between Bluetooth and Wi-Fi devices?
(a) Bluetooth used 2.4 GHz radio frequency band whereas Wi-Fi can use 2.4 GHz or 5 GHz frequency band
(b) Maximum range for Bluetooth based wireless connections is 30m while for Wi-Fi, it can extend well upto 100m. 
(c) Connecting two devices over Bluetooth is fairly simple as there is just a simple key matching process. On the other hand, connections concerning Wi-Fi need an expertise in configuration and security pass code matching process.
(d) All of the above

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