For the following circuit assume IBq=0.99 µA, B=100, V=25 mV, RE = 9 kO, RL=8 kQ and VBE(on)=0.7 V. The calculated 3-dB cutoff frequency due to the capacitor CL= 3.4 uF is: Vee 500 CB B-100 Vs CL Vo 100k RE RL -Vec
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- A coil of resistance 20 ohms and inductance 200 microHenry is in parallel with a variable capacitor. This combination is in series with a resistor of 8000 ohms. The voltagge of the supply is 200V at a frequency of 1000000 Hertz. Calculate: a. The value of C to give resonance b. The Q of the coilSince Ic = Icsat / 2 = 4mA, Vc = 18V, ßdc = 110 and VBE = 0.7V in the circuit in the figure; RC, RE and RB resistorscalculateCritically analyse the principles of circuit theory to explain series resonant circuit. Deriveexpression for resonant frequency and evaluate the resonant frequency and current flowing atresonance in a series a.c circuit consisting of a coil of resistance 4 ohm , inductance 70mH and capacitance0.06 uF if the supply voltage is 100V
- A 15.9 microfarad capacitor and a 15.1 mh inductor are connected in parallel. In series with these units are a variable resistor R and an adjustable device X, joined in series. (a) Determine the kind and size of device X (inductance in henrys or capacitance in microfarad) when the circuit is connected to a 50-volt 400-cycle source and is adjusted to resonance. (b) For the resonant condition calculate the value of R if the voltage drop across the paralleled units is to be 100 volts.Q2. A series circuit consists of a 0.5 uF capacitor, a coil of inductance 0.32 H and resistance 40 Q and a 20 Q non-inductive resistor. Calculate the value of the resonant frequency of the circuit. When the circuit is connected to a 30 V a.c. supply at this resonant frequency, determine: (a) the p.d. across each of the three components; (b) the current flowing in the circuit; (c) the active power absorbed by the circuit.Since Vi = 20 mV, Vcc = 25 V, RB = 470 kΩ, RC = 3.2 kΩ, RE1 = 470 Ω, RE2 = 1.2 kΩ, RL = 42 kΩ and β = 110 in the circuit in the figure, the value of the output voltage (Vo) find it. NOTE-1: Capacitors are negligible at mid-band frequency. NOTE-2: The output impedance of the transistor (r0) will be neglected. a. -197,96 mV b. -222,71 mV c. -98,98 mV d. -148,47 mV e. -123,73 mV f. -173,22 mV g. -247,45 mV h. -74,24 mV
- Please answer this 6 similar amplifiers are cascaded, with lower cut-off frequency 100Hz. Bandwidth is B1=10 kHz. What is the higher cut-off frequency of the cascaded network?A 15.9-uF capacitor and a 15.1-mH inductor are connected in parallel. In series with these units are a variable resistor R and an adjustable reactive device X. joined inseries. (a) Determine the kind and size of device X inductance in henrys orcapacitance in μF) when the circuit is connected to a 50-volf 400-cycle source and is adjusted to resonance. (b) For the resonant condition calculate the value of R if the voltage drop across the paralleled units is to be 100 V.Series and parallel circuits are made from the same components as follows. A coil of resistance 300 ohm and inductance 100mH and a 4000pF capacitor are connected (i) in series and (ii) in parallel. (A) Find for each connection: (i) the resonant frequency, (ii) the Q-factor (iii) the impedance at resonance and (iv) draw the respective circuits and response curves.
- A tuned amplifier has parallel LC circuit. One branch of this parallel circuit has a capacitor of 100pFand the other branch has an inductance of 1mH plus a resistance of 25ohms. Determine,i. The resonant frequencyii. The Q of the tank circuitQuestion 02: A) How do you use Kirchhoff's law? What are the limitations of Kirchhoff's law? B) What is resonance in RLC circuit? Define the Q-factor in RLC series circuit.A tank circuit contains a capacitor and an inductor that produce 30 Ω of reactance at the resonant frequency. The inductor has a Q of 15. The voltage of 277 V is connected to the circuit. What is the total circuit current at the resonant frequency?