Difference between Ammeter and Galvanometer: In the realm of electrical instruments, the measurement of parameters such as current flow holds great significance. Two common devices employed for current measurement are the ammeter and the galvanometer, each possessing distinct characteristics.
The main difference between these two is in their capabilities: the galvanometer indicates both the direction and magnitude of the current, whilst the ammeter just indicates the magnitude of the current. This discussion will go into both instruments' properties, giving light on the distinctions between the ammeter and galvanometer.NEET Physics Syllabus | NEET Physics Important Questions with Answers |
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Difference between Ammeter and Galvanometer |
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Sr. No. | Feature | Ammeter | Galvanometer |
1 | Basic Function | Measures electric current flowing in a circuit. | Detects and indicates the presence of electric current. |
2 | Scale Type | Linear scale for direct current (DC) measurements. May have both linear and circular scales for AC and DC. | Typically has a circular scale for detecting current direction and magnitude. |
3 | Connection | Connected in series with the circuit where current is to be measured. | Initially connected in parallel with a high resistance, often used as a sensitive switch. |
4 | Resistance | Low resistance to minimize voltage drop. | High resistance to ensure minimal current flows through the device. |
5 | Range | Multiple switchable ranges for different current magnitudes. | Limited range, often requires a shunt or multiplier for extending the range. |
6 | Purpose | Precisely measures current for various applications. | Primarily used for qualitative detection of current presence and direction. |
7 | Use Cases | Commonly used in electronic circuits and power systems. | Historically used in laboratories and early electrical instruments. |
8 | Construction | Typically consists of a coil, shunt, and a calibrated scale. | Comprises a coil suspended in a magnetic field with a pointer attached to indicate current flow. |
9 | Reading Interpretation | Direct numerical values on the scale indicate the current. | Requires calibration and may involve interpreting both the angle and deflection direction. |
10 | Application | Integral part of circuit analysis and troubleshooting. | Often replaced by digital instruments for precise measurements. |