## CORE INFORMATION\n✓ **Answer**: B\n## CONCEPT FRAMEWORK\n\t**Primary Concept**: Conversion of energy units.\n\t**Related Topics**: Power, Work, Joules, Watt, Hour.\n\t**Prerequisites**: Understanding of the definition of kilowatt-hour (kWh) and its relationship to joules (J).\n## SOLUTION PATHWAY\n**Given Information**:\n\t1 kWh is the energy consumed by a 1 kW device operating for 1 hour.\n**Method & Steps**:\n\t1. Convert kilowatts (kW) to watts (W).\n\t\tReasoning: To express power in base units.\n\t\tFormula/Rule: $1 kW = 1000 W$\n\t2. Convert hours (h) to seconds (s).\n\t\tReasoning: To express time in base units.\n\t\tFormula/Rule: $1 h = 3600 s$\n\t3. Calculate the energy in joules.\n\t\tWorking: $1 kWh = (1000 W) * (3600 s) = 3600000 J = 36 \times 10^5 J$\n\t\tKey Point: Energy = Power * Time\n\t4. Final step\n\t\tResult: $1 kWh = 36 \times 10^5 J$\n\t\tVerification: The result matches the correct answer.\n ## OPTION ANALYSIS\n[A] :x: 1000 W is a unit of power, not energy. It represents the rate of energy consumption or production.\n[B] ✓: $36 \times 10^5 J$ is the correct conversion of 1 kWh into joules.\n[C] :x: 1000 J is a small amount of energy and not equivalent to 1 kWh.\n[D] :x: 3600 J is the amount of energy equivalent to 1 watt for one hour, which is not one kWh.\n ## LEARNING AIDS\n\t**Common Mistakes**:\n\t\t1. Confusing power and energy: Power is the rate of energy usage, while energy is the total amount used.\n\t\t2. Incorrect unit conversion: Not converting kW to W or hours to seconds can lead to errors.\n\t**Quick Tips**:\n\t\t1. Remember that $1 kWh = 3.6 \times 10^6 J$\n\t\t2. Focus on the base units of power (watt) and time (second) for calculations.

The correct Option is "$36 \times {10^5}J$"

## CORE INFORMATION\n✓ **Answer**: A\n## CONCEPT FRAMEWORK\n\t**Primary Concept**: Energy Conversion\n\t**Related Topics**: Units of Energy, Power\n\t**Prerequisites**: Understanding of energy units and conversions\n## SOLUTION PATHWAY\n**Given Information**:\n\t\t- 1 kilowatt-hour (kWh) is a unit of energy.\n\t\t- Conversion to joules is required.\n**Method & Steps**:\n\t1. Understand the definition of kilowatt-hour:\n\t\tReasoning: 1 kWh is the energy consumed when 1 kilowatt of power is used for 1 hour.\n\t\tFormula/Rule: $1 \text{kWh} = 1 \text{kW} \times 3600 \text{s}$ (since 1 hour = 3600 seconds)\n\t2. Convert kilowatts to watts:\n\t\tWorking: $1 \text{kW} = 1000 \text{W}$\n\t\tKey Point: Use watts for conversion to joules.\n\t3. Calculate energy in joules:\n\t\tResult: $1 \text{kWh} = 1000 \text{W} \times 3600 \text{s} = 3,600,000 \text{J}$\n\t\tVerification: Ensure unit consistency and correct multiplication.\n ## OPTION ANALYSIS\n[A] ✓: 3,600,000 joules - Correct conversion of 1 kWh to joules.\n[B] :x: 3,600 joules - Incorrect, does not account for full conversion from kWh to joules.\n[C] :x: 36,000 joules - Incorrect, miscalculation of the energy conversion.\n[D] :x: 360,000 joules - Incorrect, another miscalculation of the conversion.\n ## LEARNING AIDS\n\t**Common Mistakes**:\n\t\t1. Misunderstanding the conversion between kilowatts and watts: Always remember 1 kW = 1000 W.\n\t\t2. Forgetting the time conversion: 1 hour = 3600 seconds is crucial.\n\t**Quick Tips**:\n\t\t1. Remember the shortcut for this common conversion: 1 kWh = 3,600,000 J.\n\t\t2. Use the memory aid 'kilo means thousand' to convert kW to W quickly.

The correct Option is "3,600,000 joules"

NEET Physics Units And Measurement Priniciple Of Homoginity MCQs

Prepare for NEET Physics Units And Measurement (Principle Of Homogeneity) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert solutions to ensure dimensional consistency in physical equations.

NEET Questions / Physics / Units And Measurement / Priniciple Of Homoginity