Answer :
Final answer:
Most analog multimeters feature calibrated scales to facilitate accurate measurements across different settings such as AC, DC, and resistance, using a key component called a galvanometer to visually represent measurements. Therefore the correct answer is: b)
Explanation:
Most analog multimeters have several calibrated scales that correspond to the different selector switch settings (AC, DC, and R) and placement of the test leads (mA jack and 10 A jack). Analog meters utilize a device known as a galvanometer to measure electrical parameters like voltage and current.
The galvanometer, marked with the letter G, allows for the deflection of a needle in proportion to the current flow (IG), effectively pointing out measurements on these calibrated scales. This mechanism is crucial for engaging in precise electrical measurements, as it offers a visual representation of the electrical parameter being measured.
For instance, when measuring currents, the meter might be set up to handle large currents up to 10 A by using the 10 A plug, while smaller currents are better measured with a more sensitive setting. Similarly, the choice between AC and DC measurements is facilitated by selecting the appropriate setting on the multimeter.
This caters to accurate readings across various electrical scenarios, ensuring that users can adapt the multimeter to specific measurement needs without overloading the device.
