Choose the option that is related to the third term in the same way as the second term is related to the first term:

Power : Watt :: Energy : ______

Appeared in: JSSH Staff Nurse - 2019

Explanation

The question presents an analogy based on the relationship between a physical quantity and its standard (SI) unit of measurement.
In the first pair, 'Power' is the physical quantity, and 'Watt' is its corresponding SI unit.
Following this pattern, the quantity 'Energy' must be paired with its SI unit, which is the 'Joule'.

Option A: Newton is the SI unit of force, which is defined as the force required to accelerate a mass of one kilogram at a rate of one meter per second squared.
Option C: Ampere is the SI unit of electric current, representing the flow of electric charge.
Option D: 'Tom' is a proper name and not a recognized unit of any physical quantity.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Analogy: Physical Quantities and SI Units as background academic context rather than a clinical decision trigger.
Understanding SI units is fundamental in healthcare for accurate calculations, such as determining a patient's nutritional energy requirements, which are measured in Joules (or more commonly, kilojoules and kilocalories).
Many medical devices are calibrated using SI units. For example, the energy delivered by a defibrillator is measured in Joules, and the power of diagnostic ultrasound waves can be described in Watts.
What if? - If the question were 'Mass : Kilogram :: Electric Charge : _______?', the answer would be 'Coulomb', following the same 'Quantity : SI Unit' logic.

How to Approach the Question

First, analyze the relationship between the first pair of words: 'Power' and 'Watt'.
Recognize that 'Power' is a physical concept or quantity, and 'Watt' is its standard unit of measurement.
Establish the pattern as 'Quantity : Unit'.
Apply this same pattern to the second part of the analogy, which begins with the quantity 'Energy'.
Search for the option that represents the standard unit of 'Energy'.
Evaluate the options provided: Newton is the unit of force, Joule is the unit of energy, and Ampere is the unit of current. 'Tom' is not a unit. Therefore, Joule is the correct answer.

Concept Tested & Keywords

QnRAwTmwQFQMV5B7j65880

E6 Nutrition Monika Sharma 3e p. 71-73

E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) p. 167-169

E6 Nutrition Kumud Khanna 2e p. 61-63

Practise the full JSSH Staff Nurse - 2019

Attempt every question from this paper in a timed mock, then review the full solution for each one.