4. What are the roles of speakers and amplifiers in the cellphones?

Q: A- An ideal class-B power amplifier uses single transistor with 1kQ load; the d.c collector current…

A: Given For a Class B Power amplifier, RL = 1kilo ohms =1000 ohms  Idc = 10mA =0.01A Pac = ?

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Q: Example23/ Two transformers (4) are designed to match a line having a Z, = 3002 , Zr = 752 find…

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Q: is the half step angle of the output shaft on the 28BYJ-48-5V stepper motor

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Q: Example23/ Two transformers (4) are designed to match a line having a Z. 3002 , Zr = 75N find Stable…

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Q: UT +1. Vr 25 ΚΩ + 100 ΚΩ ww VC 20 μF ic = [10 ult-t₁) - 5. u(t – t₂)] V (+1

A:

Q: c. Current transformers, of turns ratio 1200:1, are used as supply to a differential relay of…

A: Given: Turns ratio=1200:1RL=1.8+2.5RL=4.3ΩSetting current, Is=1.5 AI=80 kARelay resistance,…

Q: 3. Charging a capacitor through a resistor. The capacitor initially starts with no charge. Refer to…

A: The solution is given below

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Q: Example25/ T-L with Zo=6000,ZR = 100 Q. Find the length and location of the %3D single stub…

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Q: 12. An FM signal is expressed as: s(t) = 2000 cos(2710’t+0.5cos 2710*t). The peak frequency…

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Q: Given the information appearing in Fig. 119, determine: a. lc. b. Rc. Rp. d. VCE- C.

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Q: Calculate the shaft torque for an 8 pole, three-phase AC induction motor with 20 hp, 220 V, if, at a…

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Q: A transmission line of characteristic impedance of Zo=50 ohm with length of A/4 loaded by a load…

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Q: T-L with Zo=600 0,ZR = 100 O. Find the length and location of the single stub terminated by short…

A: Given,Zo = 600 ΩZR = 100 Ωf=100 MHz

Q: Summarize the topic AC Common Base Amplifier.

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Q: a) Refer to the circuit diagram below; R = 1K, Vcc = 20V, D1 = D2. A follow; (i) Determine the class…

A: Given: Consider the following circuit diagram: Here, R=1 kΩVCC=20 VD1=D2 To find: (i) Determine the…

Q: Vs E

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Q: Example25/ T-L with Zo=600 0,ZR = 100 Q. Find the length and location of the single stub terminated…

A:

Q: provide the diagram of the h-parameter model of the given ce amplifier configuration

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Q: Electrical Engineering In the circuit shown, the voltage source has the form V. (t)=9 cos(400t)…

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Q: -5. Design a logic circuit whose output is HIGH only when a majority inputs A, B, and C are LOW.

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Q: T-L with Zo=6000,ZR = 100 0. Find the length and location of the single stub terminated by short…

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Q: bne $t0, overflow ---) Consider the multiplexer shown in Fig. 1, where the four data lines (10, 11,…

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Q: Example25/ T-L with Zo=600 Q,ZR = 100 Q. Find the length and location of the %3D single stub…

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Q: 22 RV IS used f Vary the gain. Show that vo is given by: RI Rz RI Yo =

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Q: Vcc 2.2 k2 Rs VCE = 7.2 Ig = 20 HA IE = 4 ma FIG. 120

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Q: There are two loads connected in parallel and powered from a 7200-V source. The first load is 50-kVA…

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Q: 3. The input frequency to a mod 10 counter is 1000HZ. What is the output frequency of the last flip…

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Q: Determine the DC currents (B. Ic and le) and de juncion voltages (VBE, VCE and Vca) mA. Ic ma, E mA…

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Q: Problem 4: Current Mirror Two BJT transistors, both are operating in the forward active region, are…

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A: We have to type the image in the computer.

Q: Example23/ Two transformers (4) are designed to match a line having a Z. 3002, ZR : 750 find Stable…

A: Given: Zo= 300 ohms  ZR= 75 ohms  Formula: Zo2/ ZR

Q: 1. What is the average of A. a sine function over one cycle? Justify this mathematically. B. the…

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Thermistors

A thermistor is a special type of resistor whose resistance is more temperature-dependent than standard resistors.  The resistance of the thermistor decreases with increasing temperature. This is the basic principle of thermistors. This allows the thermistor circuit to detect very small temperature changes that cannot be observed with the Resistance temperature detectors (RTDs) or the thermocouples. Since the resistance of a thermistor is temperature dependent, it can be connected to an electrical circuit to measure body temperature. This high sensitivity to temperature changes makes thermistors very useful for accurately controlling and calibrating temperature measurements. In general, resistance increases with increasing temperature in most metals, but thermistors react negatively.