Understanding the Galvanometer Graphometer Analogy

The question asks us to find the word that has the same relationship with 'Graphometer' as 'Electric current' has with 'Galvanometer'. This is a classic analogy question testing our knowledge of instruments and what they measure.

Analyzing the First Pair: Galvanometer and Electric Current

A Galvanometer is a type of sensitive ammeter that is used for detecting and measuring small amounts of Electric current. So, the relationship here is: Instrument : Measured Quantity.

Applying the Relationship to the Second Pair: Graphometer and ?

Following the pattern from the first pair, the Graphometer must be an instrument used to measure the quantity represented by the missing word. We need to identify what a Graphometer measures.

• A Graphometer is a historical surveying instrument used for measuring Angles. It typically consists of a semicircle with a pivoted arm.

Let's examine the given options:

• Oscillations: Oscillations are typically measured or visualized by instruments like oscilloscopes, especially in the context of electrical signals. A Graphometer is not used for measuring oscillations.
• Altitudes: Altitudes (heights) are measured using instruments like altimeters, often based on atmospheric pressure or GPS. A Graphometer is not used for measuring altitudes.
• Angles: As discussed, a Graphometer is specifically designed and used for measuring angles, particularly in surveying and geometry. This fits the 'Instrument : Measured Quantity' relationship.
• Humidity: Humidity (the amount of water vapor in the air) is measured using a hygrometer. A Graphometer is not used for measuring humidity.

Based on the function of the Graphometer, the quantity it measures is Angles.

Conclusion of the Analogy

The analogy follows the pattern: Instrument : Measured Quantity.

• Galvanometer : Electric current (Galvanometer measures Electric current)
• Graphometer : Angles (Graphometer measures Angles)

Therefore, the word that completes the analogy is 'Angles'.

Revision Table: Key Instruments and Measurements

Additional Information on Measuring Instruments and Analogies

Understanding the function of various measuring instruments is crucial for solving analogies like this. Analogies help develop reasoning skills by identifying relationships between pairs of words or concepts. Common relationships include part-to-whole, cause-and-effect, synonym/antonym, and instrument-to-measurement, as seen in this question.

The Graphometer is an example of a historical scientific instrument. While modern surveying often uses theodolites or total stations, understanding the purpose of older instruments like the Graphometer for measuring angles helps solve such verbal reasoning problems.

Practicing identifying these relationships with different types of words can improve performance on analogy questions.