A moving cool milliameter having a resistance of 10 ohms gives full scale deflection when a current of 5 MA is passed through it. explain how this instrument can be used for measure (a) current uptown 1A, (b) voltage up to 5v


A moving cool milliameter having a resistance of 10 ohms gives full scale deflection when a...
A galvanometer has a coil resistance of 100 ohms and gives a full scale deflection when the potential difference across it is 0.0005 V. What size resistor (with a value measured in ohms) is required to make a 5.0 A. full scale deflection ammeter?
2) For a galvonometer, the value of the current that gives a full scale deflection is 3 mA and the internal resistance of the coil in the galvanometer is 90 2. a) Find the shunt resistance Rs which allows this galvonometer to be used as a 5 A ammeter. b) Draw the circuit of the constructed 5 A ammeter and show the corresponding currents and resistance values in the circuit. c) When the scale shows 0.75 mA, what will be...
A galvanometer of resistance 100 Ω gives full-scale deflection when its current is 1.0 mA. It is used to construct an ammeter whose full-scale reading is 100 A. If the shunt resistor consists of a piece of 10-gauge copper wire (diameter 2.59 mm), what should its length be
An analog ohmmeter based on moving coil instrument is designed using with full-scale deflection angle of 120 degrees, moving coil resistance of 50 Ω, a 9V battery and a series resistance. Calculate the value of the series resistance such that the half-scale deflection corresponds to a measured resistance of 10 kΩ.
1. (a) i. Briefly explain the three (3) main functions of instruments and give examples each. ii. Explain loading effects in a measurement system.(b) A Maxwell bridge in Fig 1 below is used to measure an inductive impedance. The bridge constants at balance are:R1 = 235 kΩ, C1 = 0.012 µF, R2 = 2.5 kΩ, R3 = 50 kΩFind the series equivalent of the unknown impedance. 2. (a) The power input to a 3-phase induction...
A moving coil instrument has a resistance of 10ΩΩ and give a full deflection of 150 divisions with a p.d of 0.15V. Calculate the extra resistance required and show how it is connected to enable the instrument to be used as a voltmeter reading upto 15 volts. If the moving coil has a negligible temperature coefficient but the addedresistance has a temperature coefifcient of 0.004Ω/°C. Determine the reading that the p.d of 10V will give at 15°C, assuming instrument reads...
A 300 V voltmeter is specified to be accurate within ± 2% at full scale deflection. Calculate the absolute error and the percentage error when the instrument is used to measure a 120 V.
Y ou have available a galvanometer that gives a full-scale deflection for a 333-μA current and has a coil resistance of 33 Ω. (a) What shunt resistance is needed to convert this galvanometer to a 5.0-A ammeter? (b) What series resistance is needed to convert this galvanometer to a 5.0-V voltmeter?
Given a moving coil type measuring unit with: Internal resistance R= 1 kq; current for end-of- scale deflection in=0.01 mA. 41 [V] -411 [V] Using this unit, design a DC V-meter to show a half-scale deflection under the periodic input voltage given in the figure and having an internal resistance of R=10 kn/v.
A galvanometer has a coil with a resistance of 24.0 ?, and a current of 180 ?A causes it to deflect full scale. If this galvanometer is to be used to construct an ammeter that can read up to 10.0 A, what shunt resistor in micro-ohms is required?