Power Unit Calculation
Power is defined as the rate at which energy is transferred or used.
The formula for power is:
$P = \frac{E}{t}$
Where:
- \( P \) represents Power
- \( E \) represents Energy consumed
- \( t \) represents time taken
Given in the question:
- Energy \( E = 1 \) Joule
- Time \( t = 1 \) second
Substituting these values into the formula:
$P = \frac{1 \text{ Joule}}{1 \text{ second}}$
The unit derived from Joules per second is defined as the Watt.
$P = 1 \text{ Watt}$
Thus, when one joule of energy is consumed in one second, the power used is one watt.
Similar Questions
- ______ is defined as the time rate at which work is done or energy is transferred.
A girl of mass 40 kg climbs up a rope through a height of 6 m in 16 s. The power expended by her is ______. (Take \(g = -10\text{ m/s}^2\))
Which of the following is an INCORRECT formula for power?
The Work done by the motor per unit time is called _________________.
Important Questions from Power
Express the power dissipated in a 100 Ω resistor in dB relative to 1 mW, when the voltage across the resistor is 1.0 Vrms
An elevator weighing 500 kg is to be lifted up at a constant velocity of 0.25 m/s. What would be the minimum horsepower of the motor to be used? G = 9.8 m/s2 and there is no frictional loss.
How many units of electric power will be consumed by 4 motors of 0.5 HP each in 8 hours?
Which of the following is not equivalent of Watts?
- ______ is defined as the time rate at which work is done or energy is transferred.
