हिंदी

The device which converts mechanical energy into energy which runs our microwave oven is : - Science

Advertisements
Advertisements

प्रश्न

The device which converts mechanical energy into energy which runs our microwave oven is :

विकल्प

  • electric motor

  • alternator

  • turbine

  • electric heater

MCQ
Advertisements

उत्तर

Alternator is the device that converts mechanical energy into energy, which runs in microwave oven.
Therefore the answer is, (b) Alternator.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Work and energy - Very Short Answers 2 [पृष्ठ १६४]

APPEARS IN

लखमीर सिंग Physics (Science) [English] Class 9 ICSE
अध्याय 4 Work and energy
Very Short Answers 2 | Q 44 | पृष्ठ १६४

संबंधित प्रश्न

Does the transfer of energy take place when you push a huge rock with all your might and fail to move it? Where is the energy you spend going?


A ball is placed on a compressed spring. What form of energy does the spring possess? On releasing the spring, the ball flies away. Give a reason.


Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when

  1. The body is at the top.
  2. the body has fallen a distance x.
  3. the body has reached the ground.

Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________. 


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 :


What kind of energy transformation take place at a hydroelectric power station?


How much electrical energy in joules does a 100 watt lamp consume : in 1 second? 


Describe the energy changes which take place in a radio.


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?


A girl with having a mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s–1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×