Advertisements
Advertisements
प्रश्न
Differentiate between watt and watt hour.
Advertisements
उत्तर
1 watt of power is used to accomplish 1 joule of work in 1 second. The power unit is S.I. Although the watt hour is a larger measure of energy, it represents the power of one watt used in an hour, or 3.6 kJ.
APPEARS IN
संबंधित प्रश्न
A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m3 in 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, how much electric power is consumed by the pump?
Rajan exerts a force of 150 N in pulling a cart at a constant speed of 10 m/s-1. Calculate the power exerted.
Define power.
Arrive at an expression for power and velocity. Give some examples for the same.
A bullet of mass 20 g strikes a pendulum of mass 5 kg. The centre of mass of the pendulum rises a vertical distance of 10 cm. If the bullet gets embedded into the pendulum, calculate its initial speed.
Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input energy. How much power is generated by the turbine? (g = 10m/s2)
A man is throwing bricks of mass 2 kg onto a floor from a height of 2 m. Bricks reach the floor at a speed `2sqrt(10)` m/s. Man throws 10 bricks in a minute. If the power of man is W watt then `3/10` W is equal to ______ W.
Unit of power used in mechanical engineering is ______.
Name the quantity which is measured in Wh.
