Q. 16 A4.9( 8 Votes )
A battery lights a bulb. Describe the energy change involved in the process.
When the bulb is connected to the battery the chemical energy of the battery is converted into the electrical energy. When bulb receives this electrical energy it converts it into light and heat energy. The figure below shows the energy transformation in more descriptive way.
Chemical Energy → Electrical Energy → Light Energy + Heat Energy
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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 systemLakhmir Singh & Manjit Kaur - Physics
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A potential energy = 80 J
Kinetic energy = 0
B Kinetic energy = 48 J
C = potential energy = 0
(a) What is the kinetic energy of ball when it hits the ground?
(b) What is the potential energy of ball at B?
(c) Which law you have made use of in answering this question?Lakhmir Singh & Manjit Kaur - Physics
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(ii) Maximum kinetic energy?
Give reasons for your answer.Lakhmir Singh & Manjit Kaur - Physics
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