📘 electronics

1. **Problem Statement:** A transistor in common emitter configuration has collector supply voltage $V_{CC} = 8$ V, voltage drop across collector resistor $V_{RC} = 0.5$ V, and res

1. **Problem Statement:** Determine the voltage $V_{CB}$ in the given silicon transistor circuit with $\beta = 150$. The circuit has $V_{BB} = 5V$, $V_{CC} = 10V$, $R_B = 10k\Omega

1. **Problem Statement:** Calculate the AC voltage required for a half-wave rectifier supplying 50 V DC to a resistive load of 800 Ω, with a diode resistance of 25 Ω.

1. **Problem statement:** Given a transistor circuit with parameters \( \beta = 140 \), \( r_o = 100\text{k}\Omega \) (and later \( 20\text{k}\Omega \)), and resistors \( R_B = 390

1. **Problem Statement:** Determine the emitter resistance $R_e$, input impedance $Z_i$, output impedance $Z_o$, voltage gain $A_v$, and current gain $A_i$ for the given transistor

1. **Problem Statement:** Given an operational amplifier (op amp) circuit with resistors $R_1 = 2\,K\Omega$ and $R_2 = 4\,K\Omega$, and an input voltage $V_1 = 2\,V$. The op amp is

1. **Problem Statement:** Given resistors $R_2 = 50\,000\ \Omega$ and $R_3 = 3R_4 = 600\ \Omega$, find the value of $R_4$ and analyze the circuit behavior for the sinusoidal signal

1. The problem is to compute the resistance value of a resistor with color bands Green, Black, Yellow, and Silver using the resistor color code formula. 2. The resistor color code

1. **Stating the problem:** (a)(i) Define switching and remote control system.

1. **Problem Statement:** (a)(i) Distinguish between modulation and demodulation in electronics and instrumentation.

1. The question asks for the working principle of a mobile charger with a proper circuit diagram and waveshape. 2. A mobile charger converts AC mains voltage to a lower DC voltage

1. Let's start by stating the problem: We want to understand the equation for the base current, usually in the context of a Bipolar Junction Transistor (BJT). 2. The base current $

1. **Working principle of BJT:** A Bipolar Junction Transistor (BJT) works by using two junctions: emitter-base and base-collector. When the base-emitter junction is forward biased

1. **Problem statement:** Given a transistor amplifier circuit and parameters $V_{CC} = 20$, $R_1 = 100000$, $R_2 = 50000$, $R_E = 1000$, $r_s = 2000$, $R_L = 1000$, $h_{fe} = -100

1. **State the problem:** We want to limit the current through a 50 ohm resistor to 10 A when connected to a 600 V power source by adding an auxiliary resistor.

1. Let's start by defining **series circuits**. In a series circuit, components are connected end-to-end, so the same current flows through each component. 2. The total resistance

1. **State the problem:** We need to find the current across the 150 Ω resistor using the superposition theorem in the given circuit with two voltage sources: 30 V on the left and