![]() ![]() But why is this? Why Do We Connect The Voltmeter In Parallel?Īny measuring instrument must not interfere with the operation of the circuit or device that we are testing. Remember that we always connect the leads of the voltmeter in parallel to the device or component. Similarly, you can use the voltmeter to measure the voltage across any two points in a circuit just by connecting the leads across those two terminals. In this way, you can use a simple voltmeter to determine whether your car’s battery is in good condition or not. But if the voltage is less than 12.4V, then the battery is low on charge and you need to recharge it immediately. If the voltage of the battery is more than 12.7V, then you can say that the battery is in a good condition. Just take the two leads of the voltmeter and place them across the terminal you want to measure.įor example, if you want to measure the voltage of a car battery, then take the red and black wires (positive and negative) of the voltmeter and place them at the positive (red) and negative (black) terminals of the battery. ![]() We will see more about Different Types of Voltmeters in the next section. As a result, the instruments got smaller, more accurate, and affordable.ĭepending on the type of input signal processing involved, Electronic Voltmeters are further divided into Analog Voltmeters and Digital Voltmeters. The torque then causes a pointer on a scale to displace indicating a voltage.īut recent voltmeters are Electronic Voltmeters that use semiconductor devices instead of mechanical devices. These mechanical interactions produced a torque that is proportional to the voltage that we are measuring. In the past, most volt meters are “mechanical” devices as they require different mechanical interactions between currents, current and magnetic fields, or between conductors. often use voltmeters to get accurate voltage readings. Electricians, Electronic Repair Personnel, Engineering people, etc. We can use a Voltmeter to measure the voltage of batteries, different electrical and electronic components in a circuit, electrical appliances, electronic devices, etc. There are different operating principles to measure the voltage.
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