Advertisements
Advertisements
Question
Name the energy transfers which occur when : a torch is on
Advertisements
Solution
A torch converts electrical energy of the battery into light and heat energy.
APPEARS IN
RELATED QUESTIONS
A stone of mass 500 g is thrown vertically upwards with a velocity of 15 m/s. Calculate:
- the potential energy at the greatest height,
- the kinetic energy on reaching the ground, and
- the total energy at its half-way point.
State whether the object possess kinetic energy, potential energy, or both :
A man climbing a hill _____________.
State whether the object possess kinetic energy, potential energy, or both :
A flying aeroplane _______________.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his kinetic energy at the highest point?
Give two examples where a body possesses both, kinetic energy as well as potential energy.
Name the device or machine which convert :
Electrical energy into light energy.
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.
A bulb lights up when connected to a battery. State the energy change which takes place :
An object is falling freely from a height x. After it has fallen a height `pi/2` , it will possess :
