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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An instrument used to measure currents is called an ammeter. To measure the current in a wire, you usually have to break or cut the wire and insert the ammeter so that the current to be measured passes through the meter. An ammeter always measures the current passing through it. An ideal ammeter would have zero resistance, so including it in a branch of a circuit would not affect the current in that branch. Real ammeters always have some finite resistance, but it is always desirable for an ammeter to have as little resistance as possible. The principle of operation of ammeters is based on the interaction between an electric current and a magnetic field.

An ideal ammeter has

Electrical currents are then measured in the form of amperes, hence the name, "ammeter". The term "ammeter" is sometimes used incorrectly as "ampmeter". Ammeters are designed, as well as ohmmeters and voltmeters , to be used with the use of a sensitive current detector such as a moving coil in a galvanometer. In order to measure the electric current flow through it, an ammeter is placed in series with a circuit element. The ammeter is designed to offer very low resistance to the current, so that it does not appreciably change the circuit it is measuring.

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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.

UP Police Assistant Operator. Subject wise question Paper. Assam Police Constable. Bombay High Court Junior Clerk. Voltmeter A voltmeter is an instrument that is used to measure the voltage across two terminals in a circuit. They all are connected in the circuit in a series connection. KVS Librarian. JEE students also check. Bank Note Press Dewas. We are expecting same number of vacancies this year too. DRDO Fireman. Mazagon Dock Shipbuilders Non Executive. Ammeter Ammeter is an instrument that is used to measure the current flowing through the circuit. A voltmeter is an instrument used for measuring the electric potential difference between two points in an electric circuit.