# Which of these is used to measure current in series circuit?

Ammeter

### What is the difference between an ammeter and voltmeter with regard to its external connection?

An Ammeter connects a low impedance on the test points, so the equivalent of that is a "short circuit" between the test points. This is done to avoid a drop of current on the tested circuit. A Voltmeter connects a high impedance on the test points, so the equivalent of that is a "open circuit" between the test points. This is done to avoid a drop of voltage on the tested circuit. --------- In terms…

### How do you connect a shunt resistor to a DC circuit to measure current?

To measure the current in a DC circuit an ammeter may be used. This ammeter may consist of a sensitive meter with a shunt in parallel with it to divert part of the current. In case even more current is expected than the full scale reading of the meter an additional shunt may be connected in parallel with that arrangement.

### What is a fuse used for?

A fuse is a safety device that lies in series in a circuit between an electrical source and its associated load(s). When the current, or flow of electricity, exceeds its designed threshold, the fuse is calibrated to permanently open the series circuit, thereby disconnecting the load(s) from the power source. Unlike circuit breakers, which can be reset to allow current to flow again, once a fuse disconnects, it must be discarded and replaced with a…

### A fuse in a circuit is meant to burn out first if there is a short circuit. Should a fuse have a higher or lower resistance than the wire in the rest of the circuit?

The way current (series) fuses are designed and used, they are meant to overheat and blow and cause an open circuit if the current flow through these goes above the rated value. The resistance value typically is slightly higher than the wiring and adds marginal value of series resistance to the overall circuitry. The material characteristics of fuse ensure that at regular nominal current flow the fuse does not overheat, but when larger than expected…

### Difference between watt and volt-amperes?

Although we can't necessarily see electricity, we can measure it by its effects. An ampere, or amp, represents the amount of current in a circuit. Voltage is defined scientifically as the circuit's "potential difference," and can be seen as the amount of "pressure" that drives electricity in a circuit. Watts are a measure of the use of electrical power, and one watt is equal to one volt multiplied by one amp. Additional Answer The watt…

### What is an electronic device that limits the amount of current that can flow through it?

A current limiter. Commonly used in well designed power supplies to make the power supply "Fold over" if output current exceeds a safe value. Commonly use a low value resistor in series with the output, and a circuit that senses the voltage across it. Although the above answer describes a circuit to limit current, the device that limits the amount of current flowing through it is a resistor.

### What is the difference between circuit breaker and contactor?

A circuit breaker is designed to break a circuit which is carrying current at the time. Where large currents and/or voltages are present, the opening of the circuit may induce dangerous arcing, so means such as air blast must be used to "blow out" the arc. Air breakers are being phased out and replaced with vacuum or SF6 breakers. An isolator is only designed to isolate a circuit or other component after the current has…

### What is a resistor used for?

A Resistor Is Used To Limit The Current In A Circuit Further Answer A resistor is sometimes used to modify the natural resistance of a circuit -e.g. by adding a resistor in series, you can increase the natural resistance; by adding a resistor in parallel, you can decrease the natural resistance. Two or more resistors can be used to create a voltage divider -a method of obtaining a voltage lower than the supply voltage in…

### Will the voltmeter work when ammeter is connected wrongly in a circuit?

The volt meter should work. The meter is connected across the supply where as the amp meter is connected in series with any load that it is metering. On larger installations to measure the amperage, a current transformer is connected around the conductor to be monitored. If a CT is used then the polarity has to be observed when connecting to an amp meter.

### Why is the series resonant circuit called an acceptor circuit?

Because the series resonant circuit has the lowest possible impedance at resonance frequency, thus allowing the AC current to circulate through it. At resonance frequency, XC=XL and XL-XC = 0. Therefore, the only electrical characteristic left in the circuit to oppose current is the internal resistance of the two components. Hence, at resonance frequency, Z = R. Note: This effect is probably better seen with vectors. Clarification: Resonant circuits come in two flavors, series and…

### If I need x Watts of Power what capacity battery in AH should i use?

There is no direct answer for this question, as voltage and wattage measure different quantities. It's kind of like asking "how many gallons are in a foot?" Volts are a unit used to measure the electric potential between points, while watts are a measure of power consumed by a circuit. They are related, though, as expressed by the power equation: P = V x I where: * P is power in watts * V is…

### What is leakage voltage?

There is no such thing. What there is is leakage current, which is the amount of undesired current flow in a branch of an actual circuit when that branch of the equivalent ideal circuit would have no current flow. Leakage current can also be used to refer to current that occurs on a path where there is no intentional circuit branch (e.g. corona discharge current to the air in a high voltage system).

### When would you use a series and when would you use a parallel circuit?

* The most common applications for series circuits is in Christmas tree lights and putting a fuse in series with delicate electronic equipment. * Each component in a circuit causes a voltage drop. Therefore, the series circuit should only be used where the voltage drop does not interfere with the proper functioning of the components in the circuit. * On the other hand, where all of the compenents in a circuit require the same supply…

### What is the main shortcoming of a series circuit?

In something like a lighting circuit, there are a couple of disadvantages to a series circuit. The first and most important is that all of the devices in the circuit must work. If you've ever dealt with Christmas tree lights you've seen the ones where one burned-out bulb kills the whole string. Second, the more bulbs in the circuit, the dimmer each one gets. But I think the worst one would be: you can't turn…

### What type of accessory device can be used to measure AC with a VOM without opening the circuit?

Electricians use a clamp or clamp-on ammeter to measure current. The handles are squeezed together and the "jaws" open up. The clamp is then slipped over the conductor and the handles are released. The "jaws" close around the conductor and the meter is then in a position to measure current in that conductor. When current flows in a conductor, the current generates a magnetic field around the conductor. And the clamp-on ammeter can "feel" the…

### What is an ohmmeter?

An Ohmmeter is a device that is used for the measurement of Electrical Resistance. An ideal Ohmmeter consists of an electronic circuit having a constant current [I] passing through a resistance [R] & another circuit that measures the voltage[V]. Thus from Ohm's Law R= V/I. Micrommeter(or) Microohmmeter : To measure Smaller Resistances. Megohmeters (or) Megaohmeter (or) Megger : To measure Larger Resistances. e.g. Insulation Resistance of Electrical Cables.

### What is a current transformer?

A current transformer (CT) is used for measurement of alternating electric currents. Current transformers, together with voltage (or potential) transformers (VT or PT), are known as instrument transformers. When current in a circuit is too high to apply directly to measuring instruments, a current transformer produces a reduced current accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments. A current transformer isolates the measuring instruments from…

### Why in no load test transformer is connected on low voltage side?

A no-load test is done with the normal supply connected in the way the transformer is intended to be used. It is also known as an open-circuit test to distinguish it from a short-circuit test, and its purpose is to measure the power loss in the iron core of the transformer and the no-load current drawn from the supply.

### Would you use Series or parallel circuit for Christmas lights?

Yes you would use a serial circuit You would use parallel circuit lights for a Christmas tree because if you used series circuit lights, and one of the bulb blows, the rest of the bulbs will go out. But with parallel circuit lights, if one bulb blows the rest of the bulbs will remain their brightness.

### How current transformer works explain with circuit diagram?

Current transformers are used to transform high currents to standardized values for control equipment as relays and meters. The primary winding in a current transformer is incorporated in the line and carries the current flowing in the network. The magnitude of the secondary current is dependent of the ratio of the transformer. A current transformer (CT) is a type of instrument transformer designed to provide a current in its secondary winding proportional to the alternating…

### What is a surge resistor?

A surge resistor is a resistor installed in a circuit to prevent a "surge" when conditions arise where a surge might occur. That might be a bit wordy, but that's the answer. Let's look at an instance where a surge resistor is used and see how it works. There are a number instances where energizing a circuit is followed by a surge of current. Like almost all the time. When that circuit "comes on" after…

### For voltage drop calculation you must use the current of the circuit breaker or the normal currents?

### What does a panel meter measure?

A panel meter can be used to measure multiple different currents and channels. A panel meter can measure temperature, speed, pressure and even electric current. There are both electric and analog panel meters that are used for many different trades, jobs and common skills. It is a very useful and frankly necessary tool that should be in each household across the world. It is useful in many different situations, from fixing the air conditioning, locating…