## Electronics Quiz-1

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background.

Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced.

Q1. In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table

•

•

•

•

Solution

Q2.Which is the correct diagram of a half-wave rectifier?
•

•

•

•

Solution
(b)

Q3.  The following figure shows a logic gate circuit with two inputs A and B and the output C. The voltage waveforms of A, B and C are as shown below The logic circuit gate is

•  AND gate
•  NAND gate
•  NOR gate
•  OR gate
Solution
(a) From truth table it is clear that output is high if at least one input is low. The Boolean expression which satisfies the output of this logic gate is C=A∙B, which is for AND gate.

Q4. When the forward bias voltage of a diode is changed from 0.6 V to 0.7 V, the current changes from 5 mA to 15 mA. Then its forward bias resistance is
Solution
(c) Forward biased resistance = ∆V/∆I=(0.7-0.6)/((15-5)×〖10〗-3 ) =0.1/〖10×10〗-3 =10 Î©

Q5.In extrinsic P and N-type semiconductor materials, the ratio of the impurity atoms to the pure semiconductor atoms is about
•  1
•  10-1
•  10-4
•  10-7
Solution
(D)

Q6. In the following, which one of the diodes is reverse biased?
•

•

•

•

Solution
(d) For reverse biasing of an ideal diode, the potential of n-side should be higher than potential of p-side. Only option (d) is satisfying the criterion for reverse biasing.

Q7.In a triode, cathode, grid and plate are at 0,-2 and 80 V respectively. The electrons are emitted from the cathode with energy 3 eV. The energy of the electron reaching the plate is
•  77eV
•  85eV
•  81eV
•  83eV
Solution

Q8.The current gain Î±of a transistor is 0.9. The transistor is connected to common base configuration. What would be the change in collector current when base current changes by 4 mA?
•  1.2 mA
•  12 mA
•  24 mA
•  36 mA
Solution

Q9.

•  A
•  B
•  C
•  D
Solution

Q10. In n-p-n transistor, in CE configuration (1) The emitter is heavily doped than the collector. (2) Emitter and collector can be interchanged. (3) The base region is very thin but is heavily doped. (4) The conventional current flows from base to emitter. which of them are correct
•  1 and 2
•  1 and 3
•  1 and 4
• 2 and 3
Solution
(C)

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