1.
Answer: (b) Valence band
2.
Answer: (d) Greater than 3 eV
3.
Answer: (b) $1.1$ eV
4.
Answer: (Image Solution - Energy Bands Diagram)
AI Image Prompt: A clean, high-quality, mathematically correct landscape diagram showing the energy band classification of Insulators, Semiconductors, and Conductors side-by-side. The Conduction Band (CB), Valence Band (VB), and Energy Gap (Eg) should be clearly labeled with representative Eg values. The background of the whole image should be fully white.
Filename: Level0_Q4_Energy_Bands_Classification.png
5.
Answer: Overlap
6.
Answer: Insulator
7.
Answer: True (Because more thermal energy excites electrons to the conduction band, increasing conductivity and decreasing resistivity).
8.
Answer: True
9.
Answer: Bandgap (or Energy Gap $E_g$)
10.
Answer: $\sigma = \frac{1}{\rho}$
11.
Answer: (c) $n_e = n_h$
12.
Answer: (a) n-type semiconductor
13.
Answer: (Image Solution - n-type Lattice)
AI Image Prompt: A clean, high-quality, mathematically correct landscape diagram showing the 2D crystal lattice of Silicon doped with a Pentavalent impurity atom (e.g., Phosphorus). Show the four covalent bonds and the fifth loosely bound "free electron". The background of the whole image should be fully white.
Filename: Level0_Q13_N_Type_Doping_Lattice.png
14.
Answer: Doping
15.
Answer: Holes, Electrons
16.
Answer: False (It is electrically neutral because the entire crystal assembly contains equal numbers of protons and electrons).
17.
Answer: True (They accept electrons from the lattice, creating holes).
18.
Answer: A -> 3; B -> 4; C -> 1; D -> 2
19.
Answer: Conduction (Conduction band)
20.
Answer: $n_e \cdot n_h = n_i^2$
21.
Answer: (c) Depletion region
22.
Answer: (b) Diffusion
23.
Answer: (Image Solution - p-n Junction)
AI Image Prompt: A clean, high-quality, mathematically correct landscape diagram of a p-n junction diode. It must clearly label the p-side, n-side, the central Depletion Layer containing immobile positive and negative ions, and the built-in electric field (E) pointing from n to p. The background of the whole image should be fully white.
Filename: Level0_Q23_PN_Junction_Depletion.png
24.
Answer: Barrier (or Built-in)
25.
Answer: $0.7$
26.
Answer: True (Mobile carriers have diffused and recombined, leaving only immobile fixed ions).
27.
Answer: True
28.
Answer: p (p-region)
29.
Answer: Drift
30.
Answer: $I_{net} = I_{diffusion} - I_{drift} = 0$
31.
Answer: (c) p-side is connected to positive terminal
32.
Answer: (d) Become wider
33.
Answer: (Image Solution - V-I Graph)
AI Image Prompt: A clean, high-quality, mathematically correct landscape graph showing the Forward and Reverse V-I characteristics of a typical p-n junction diode. Label the Forward Current (mA), Reverse Current (uA), Knee Voltage, and Breakdown Voltage clearly. The background of the whole image should be fully white.
Filename: Level0_Q33_Diode_VI_Characteristics.png
34.
Answer: Rectification
35.
Answer: Half
36.
Answer: True
37.
Answer: False (It is exactly twice the input frequency, $2f_{in}$).
38.
Answer: (Image Solution - FWR Circuit)
AI Image Prompt: A clean, high-quality, mathematically correct landscape circuit diagram of a Full-Wave Rectifier using a center-tapped transformer and two diodes (D1, D2). Show the load resistor (Rl) and the AC input/DC output waveforms adjacent to it. The background of the whole image should be fully white.
Filename: Level0_Q38_Full_Wave_Rectifier_Circuit.png
39.
Answer: Saturation (Reverse saturation current)
40.
Answer: Filter
41.
Answer: (b) $Y = A \cdot B$
42.
Answer: (d) NAND gate (NOR is also universal, but NAND is the standard option here)
43.
Answer: (Image Solution - Logic Symbols)
AI Image Prompt: A clean, high-quality, mathematically correct landscape diagram showing the standard logic symbols for the five basic gates: AND, OR, NOT, NAND, NOR. Label them clearly. The background of the whole image should be fully white.
Filename: Level0_Q43_Logic_Gate_Symbols.png
44.
Answer: Inverter (or NOT gate)
45.
Answer: NOT
46.
Answer: False (OR is $Y = A + B$; AND is $Y = A \cdot B$)
47.
Answer: True (Because NAND is NOT-AND. $1 \cdot 1 = 1$, inverted to $0$)
48.
Answer: A -> 3 or 4; B -> 4 or 3; C -> 1 or 2; D -> 2 or 1. Specifically: AND gives 0, OR gives 0, NAND gives 1, NOR gives 1 for input (0,0).
49.
Answer: OR
50.
Answer: $\overline{A} \cdot \overline{B}$
