Table of Contents
Can a voltmeter be connected in series?
The voltmeter has a high resistance. When a high resistance voltmeter is connected in series it will not have any current to flow through the circuit. Therefore, a voltmeter connected in series acts more like a resistor and not as a voltmeter.
How can the range of a voltmeter be increased?
The range of voltmeter can be increased by connecting a suitable high resistors in series with it. The range of a voltmeter can decreased by reducing its resistace. This can be done by putting a suitable resistance in parallel with the voltmeter.
What if voltmeter is connected in parallel?
When the voltmeter is connected in parallel with a circuit component, the amount of current passing through the voltmeter is very less. Therefore, the current through the circuit is unaltered. In order to measure a device’s voltage, a voltmeter is connected in parallel to a device.
What happens when voltmeter is connected in parallel?
Key Points A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.
Why voltmeter should be connected in parallel to the load and not in series?
A voltmeter is an instrument that measures the difference in electrical potential between two points in an electric circuit. In order for a voltmeter to measure a device’s voltage, it must be connected in parallel to that device. This is necessary because objects in parallel experience the same potential difference.
Why do we need to extend the range of a voltmeter What is the relation between the resistance to be connected to extend the range of meter and its internal resistance?
Multipliers: The range of voltmeter can be extended by connecting a high resistance, called multiplier in series with the voltmeter (Figure 2(b)). The multiplier limits the voltage drop so that it does not exceed the value of full scale and thus prevents from being damaged.
Why do we need to extend the range of voltmeter?
Now let us learn about the extension of the measuring range of voltmeters. Due to difficulty in measuring high voltages with normal voltmeters, it is, therefore, necessary to bring those high values to normal values that can be measurable by voltmeters. This process is called the extension of range of voltmeter.
Why voltmeter is always connected in parallel and ammeter is always connected in series?
Ammeter is always connected in series because it has low internal resistance. The current to be measured in the circuit should not be practically affected by the Ammeter, hence the need to have a low internal resistance. Voltmeter is always connected in parallel because it has high internal resistance.