Advertisements
Advertisements
प्रश्न
How much electrical energy in joules does a 100 watt lamp consume : in 1 minute?
Advertisements
उत्तर
Time (t) = 60 s
Now, we can calculate the electrical energy consumed as,
Energy consumed = Power × Time
So,
Energy consumed = 100 × 60 J
= 6000 J
So, the energy consumed is 6000 J.
APPEARS IN
संबंधित प्रश्न
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. Taking g = 10 m s−2, calculate:
- the potential energy possessed by the ball when it is initially at rest.
- the kinetic energy of the ball just before it hits the ground?
Is energy a vector quantity?
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
What type of energy is possessed : by the stretched rubber strings of a catapult?
An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass 3.5 kg. Both the spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same :
A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value of the stone?
Name the device or machine which convert :
Electrical energy into light energy.
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
The hanging bob of a simple pendulum is displaced to one extreme position B and then released. It swings towards centre position A and then to the other extreme position C. In which position does the bob have :
(i) maximum potential energy?
(ii) maximum kinetic energy?
