a.
The device which transforms electrical energy to mechanical energy.
a.
Explanation of Solution
Introduction:
A motor converts electrical energy into mechanical energy.
Device number 4 in the figure is the motor which converts electrical energy into mechanical energy.
b.
The device which transforms chemical energy to electrical energy.
b.
Explanation of Solution
Introduction:
A battery converts chemical energy to electrical energy.
Device number 1 in the figure is the battery which converts chemical energy to electrical energy.
c.
The device which turns the circuit on and off.
c.
Explanation of Solution
Introduction:
A key is used in a circuit to turn it on and off.
Device number 2 in the fig is the key which turns the circuit on and off.
d.
The device whichprovides a way to adjust the speed.
d.
Explanation of Solution
Introduction:
A rheostat is a device used to control current by varying the resistance.
Device number 3 in the figure is the rheostat which is used to control current by varying the resistance. For more speed more current is required. From Ohm’s law,
Conclusion:
Device number 3 in the figure is the rheostat which is used to control current by varying the resistance.
Chapter 22 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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