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

Academic Physics NCERT Class 9

A microphone converts sound energy into electrical energy in public address system.

So, option (d) is correct.

Tutorialspoint

e

Updated on: 10-Oct-2022

172 Views

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 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.
Name the device which converts electrical energy into mechanical energy.
In photosynthesis process, solar energy is converted into which energy?(a) Carbohydrate energy(b) Growth energy(c) Chemical energy(d) Physical energy
Which of the following energy change involves frictional force? (a) chemical energy to heat energy(b) kinetic energy to heat energy(c) potential energy to sound energy (d) chemical energy to kinetic energy
Water stored in a dam possesses:(a) no energy(b) electrical energy(c) kinetic energy(d) potential energy
State whether the following statement is true or false:An electric motor converts mechanical energy into electrical energy.
How heat energy converted into light energy?
The device which converts mechanical energy into energy which runs our microwave oven is:(a) electric motor (b) alternator (c) turbine (d) electric heater
The energy possessed by an oscillating pendulum of a clock is: (a) kinetic energy(b) potential energy(c) restoring energy(d) mechanical energy
Mechanical energy of a body includes (a) kinetic energy only(b) potential energy only(c) kinetic energy and potential energy(d) none of these
Name the electric device which converts mechanical energy into electrical energy. Draw the labelled diagram and explain the principle involved in this device.
Fill in the following blanks with suitable words:A solar cell converts ................ energy into ................ energy.
Example of conversion of heat energy into kinetic energy.
A hydro-power plant converts one form of energy into another. Name the two forms of energy.

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements