The device which converts mechanical energy into energy which runs our microwave oven is:
(a) electric motor
(b) alternator
(c) turbine
(d) electric heater

Academic Physics NCERT Class 9

The alternator is the device that converts mechanical energy into energy that runs our microwave oven.

So, option (b) is correct.

Tutorialspoint

Updated on: 10-Oct-2022

340 Views

Name the device which converts electrical energy into mechanical energy.
State whether the following statement is true or false:An electric motor converts mechanical energy into electrical energy.
Name the electric device which converts mechanical energy into electrical energy. Draw the labelled diagram and explain the principle involved in this device.
(a) Name one device which works on the magnetic effect of current.(b) Name one device which works on the phenomenon of electromagnetic induction. (c) Which device converts electric energy into mechanical energy? (d) Describe the principle of working of an electric motor. (e) Explain the principle of working of an electric generator.
A microphone converts:(a) electrical energy into sound energy in ordinary telephone(b) microwave energy into sound energy in a mobile phone(c) sound energy into mechanical energy in a stereo system(d) sound energy into electrical energy in public address system
Name the devices or machines which convert:(a) Mechanical energy into electrical energy.(b) Chemical energy into electrical energy.(c) Electrical energy into heat energy.(d) Light energy into electrical energy.(e) Electrical energy into light energy.
Name four appliances wherein an electric motor, a rotating device that converts electrical energy to mechanical energy, is used as an important component. In what respect motors are different from generators?
In photosynthesis process, solar energy is converted into which energy?(a) Carbohydrate energy(b) Growth energy(c) Chemical energy(d) Physical energy
Name the devices or machines which convert:(i) Electrical energy into sound energy.(ii) Heat energy into kinetic energy (or mechanical energy).(iii) Chemical energy into kinetic energy (or mechanical energy).(iv) Chemical energy into heat energy.(v) Light energy into heat energy.
The energy possessed by an oscillating pendulum of a clock is: (a) kinetic energy(b) potential energy(c) restoring energy(d) mechanical energy
State whether the following statements are true or false.$(a)$. An electric motor converts mechanical energy into electrical energy.$(b)$. An electric generator works on the principle of electromagnetic induction.$(c)$. The field at the centre of a long circular coil carrying current will be parallel straight lines.$(d)$. A wire with a green insulation is usually the live wire of an electric supply.
The device used for producing electric current is called a$(a)$. generator.$(b)$. galvanometer.$(c)$. ammeter.$(d)$. motor.
A motor converts one form of energy into another. Name the two forms.
Name the device which converts sunlight into electricity.
On which principal does electric motor and electric generator work ?

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements