Subject :NSO Class : Class 6
The circuit diagram shows four different switches and some wires connected to a light bulb, an electric oven and a printer.
Which of the switches must be closed in order to have the following energy conversion only?
Chemical energy → electrical energy → kinetic and sound energy
AS2 only
BS1 and S2 only
CS1 and S3 only
DS1, S2 and S4 only
Ans 1:
Class : Class 6
who says that printer produces sound energy. laser printers dont make any sort of sound. and if you dont agree than see this, oven produces sound and not only that, but, almost all machines produce sound.
Ans 2:
Class : Class 7
answer is c
Ans 3:
Class : Class 6
The answer is C