An ideal ammeter has

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Hence, An ideal voltmeter have infinite resistance, and an ideal ammeter has no resistance for accurate measurement of potential difference and current. Byju's Answer. Why should an ideal voltmeter have infinite resistance, and an ideal ammeter has no resistance? Open in App. Step 1: Voltmeter Voltmeter is a device used to measure potential difference across two points and is connected in parallel. An ideal voltmeter should have infinite resistance because to measure the potential difference all the current should pass through the resistor and no current should pass through voltmeter for precise readings. Because for infinite resistance the flow of current is zero.

An ideal ammeter has

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However, unlike the ideal voltmeter, the ideal ammeter has zero internal resistance, so as to drop as little voltage as possible as electrons flow through it. Note that this ideal resistance value is exactly opposite as that of a voltmeter. With voltmeters, we want as little current to be drawn as possible from the circuit under test. With ammeters, we want as little voltage to be dropped as possible while conducting current. Placing the same ammeter in the right branch would affect the current to an even greater extent:.

An ideal ammeter has

In the physics lab, we use many measuring devices to measure various specifications. Some devices used in the lab are voltameter, ammeter, vernier calliper, screw gauge, telescopes and many more. Electricity is measured using devices like ammeter and voltameter. In this article, let us understand and learn about the ammeter and its specification. In the 19th century, the ammeter with the ability of accurate measurements, which could be mounted in any position was invented. Ammeter is a device used to measure either alternating or direct current. We know that ampere is the unit of current.

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An instrument used to measure currents is called an ammeter.

FCI Assistant Grade 3. DMRC Maintainer. Bihar Senior Secondary Teacher. An ideal ammeter has zero resistance, practically it has low resistance. Which rule is used to find direction of magnetic field produced by a current carrying conductor? CWC Assistant Engineer. AP TET. Assertion :The resistance of an ideal voltmeter should be infinite. More General Science Questions Q1. Punjab Police Head Constable. NHB Assistant Manager.