Energy Transformation
Trending Questions
An electric bulb gives off energy mainly in the form of:
Sound energy
Electrical energy
Light and heat energy
Chemical and electrical energy
Which of the following devices converts chemical energy into electrical energy?
Mixer grinder
Battery charger
Generator
Battery
During interconversion of energy forms from one to another, total energy at any time
remains same
remains zero
keeps increasing
keeps decreasing
Identify the energy transformation taking place in the device shown below:
(i) Electrical energy, (ii) Chemical energy, (iii) Heat energy
(i) Electrical energy, (ii) Heat energy, (iii) Light energy
(i) Chemical energy, (ii) Heat energy, (iii) Light energy
(i) Chemical energy, (ii) Electrical energy, (iii) Light energy
- chemical energy into electrical energy
- electrical energy into light energy
- electrical energy into magnetic energy
- magnetic energy into electrical energy
What is the working principle of water heater, iron box, and electric kettle ? In other words how is heat generated in these device ?
In which of the following forms does an electric bulb convert electrical energy into?
light energy
chemical energy
mechanical energy
heat energy
What is the working principle of water heater, iron box, and electric kettle ? In other words how is heat generated in these device ?
Why doesn't the LED bulb heat up the room
- chemical energy into electrical energy
- electrical energy into light energy
- electrical energy into magnetic energy
- magnetic energy into electrical energy
i. The metal disc of an electric cell is a negative terminal.
ii. In electric cell, electrical energy is converted into chemical energy.
iii. Electric current does not flow in an open electric circuit.
- i and ii only
- only iii
- i and iii only
- ii and iii only