Power, Energy, and Efficiency

The 11th Five Year Plan (2007-12) targeted a power capacity addition of 66,463 MW. This ambitious target aimed to address India's growing power demand and infrastructure needs. The actual achievement fell slightly short of this target but still represented significant capacity expansion.

The Hirakud Dam, located in Odisha, India, has an installed power capacity of 270 MW generated by its powerhouse. This is a factual specification of the dam's hydroelectric power generation capability. The other options represent either different capacity values or incorrect figures.

The power is simply the rate at which energy is supplied to a circuit or transformed by a circuit. In this case, the power is the energy consumed per time. P = (200 J) / (4 seconds) = 50 Watts

Energy consumed = Voltage × Current × Time = 250V × 4A × 2 hours = 2000 Wh = 2 kWh. Using the formula E = VIT, we calculate the energy in watt-hours and convert to kilowatt-hours by dividing by 1000. Option D (2 kWh) is the correct answer. The other options (1, 1.5, and 4 kWh) don't match this calculation.

Power is defined as the rate of energy transfer or work done per unit time. The formula is P = E/t. Here, Energy = 20 joules, Time = 5 seconds. Therefore, Power = 20/5 = 4 watts. Option D is correct.

The relationship is physical quantity:its SI unit. Energy is measured in joules. Similarly, volume is measured in litres (liters). The other options (capacity, kilograms, solid) are not units of volume - kilograms measure mass, not volume.

KWH (kilowatt-hour) measures energy consumption over time, which is how utilities bill residential customers. Joules are too small for practical billing, watts measure instantaneous power (not energy), and MPH measures speed.

One mechanical horsepower is defined as approximately 745.7 watts, which is commonly rounded to 746 watts in physics problems. It is a unit used to measure the rate at which work is done.

The 11th Five Year Plan (2007-2012) set an ambitious target for power capacity addition, which was officially recorded as 66,463 MW.

1 HP is approximately 0.746 kW. A 20 HP motor is 20 * 0.746 = 14.92 kW. For 100 hours, energy consumed is 1492 kWh. At 1 rupee per unit, the cost is 1492, which is closest to 1500.

In agricultural engineering and human power studies, the average sustained power output of a healthy human is often estimated to be around 0.1 horsepower.

Agricultural tractors are designed for various field operations, and their power output typically ranges from 20 to 50 horsepower for general-purpose farming tasks. This range covers most small to medium-sized tractors used by farmers.

One kilowatt (kW) is a unit of power equal to 1000 watts. Since 1 horsepower (hp) is approximately 746 watts, 1 kW = 1000 / 746, which is approximately 1.34 hp.

1. 95% to 100%