1. Can resistor values be determined from the color codes? How? Are these values exact? Explain.
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- An AC ammeter is connected in series with the primary winding of T1. What is the expected current reading? An AC ammeter is connected in series with the secondary winding of T1. What is the expected current reading? An AC ammeter is connected in series with R1. What is the expected current reading? NOTE: Idc for HW rectifier = 0.318 * Ipeak = 0.45 * Irms Describe/Explain briefly the purpose/use of the array (series-parallel) connection of the rectifier diodes in the given circuit.A DC voltmeter has a sensitivity of 1000 ohm/volt. When it measures half of full scale what is the current through voltmeter? A.100 mA B.1 mA C.0.5 mA D. 50 mAAnswer the following questions: A 0 -150 volt DC voltmeter has a resistance of 100 ohms per volt. What is the instrument resistance? What is the instrument full-scale current? Extend the range of the voltmeter to 750 volts by adding an external multiplier. What is the resistance value, in ohms, of this external multiplier? What is the power dissipation of the external multiplier when the voltmeter is used to measure 750 volts?
- A DC voltmeter has a sensitivity of 1000 ohm/volt. When it measures half of full scale in 100 V range, the current through the voltmeter is ??A galvenometer has full scale current of 20 (mA) and has a meter resistance of 2000 (ohm). To increase the range of galvanometer we add a shunt resistance of 200(ohm). What is value of multiplying factor?A 50 μA basic D'Arsonval movement with an internal resistance of 500 is to be used as a voltmeter. The value of the multiplier resistance required to measure a full-scale voltage range of 0-5 volts is?
- C) The figure4 shows the relation between resistance and temperature for the thermistor. What is the value of resistance approximately at 70°C? What happens to the resistance value as the temperature increases? 3. Is it PTC or NTC thermistor? Justify your answer.What is the difference between an ammeter and a voltmeter? How they are connected in a circuit (draw circuit diagram)?1. What is the relation between the voltage and current in the load resistor?2. Why the polarity of dc instruments is important?3. Comment on the internal resistances of the ammeter and voltmeter?4. What is the effect of increasing the supply voltage when the load resistor is in a fixed position?5. Discuss the effect of changing the load resistance with fixed supply voltage?
- In the figure the ideal batteries have emfs ɛ1 = 20.4 V, ɛ2 = 9.05 V, and ɛ3 = 5.40 V, and the resistances are each 2.40 Q. What are the (a) size and (b) direction (left or right) of current i,? (c) Does battery 1 supply or absorb energy, and (d) what is its power? (e) Does battery 2 supply or absorb energy, and (f) what is its power? (g) Does battery 3 supply or absorb energy, and (h) what is its power? (a) Number i Units (b) (c) (d) Number i Units (e) (f) Number i Units (g) (h) Number i UnitsQ1.) a) PMMC meter has (10mA) half scale current deflection and (1500) internal resistance. Use this meter to design a dc multimeter of indirect ammeter and direct voltmeter methods to measure the following ranges of current and voltage: 50mA, 100mA, 1A, 5V, 50V, and 150V. Draw the circuit diagram of this multimeter with a control switch that can be used to measure either current or voltage.a) Explain how you make a change in the circuit to determine the operating point of the circuit shown in the figure.