Concept explainers
To Calculate: The number of lamps that C must remove from the circuit.
Answer to Problem 9STP
5
Explanation of Solution
Given:
Number of bulbs that are connected,
Voltage provided by battery,
Current,
Required current,
Formula Used:
Equivalent resistance for series combination can be obtained by:
Ohm’s law:
Here, I is the current, V is the potential difference and R is the resistance.
Calculations:
Lamps are connected in series. Let their equivalent resistance be
Here, R is the resistance of 1 lamp.
First, use Ohm’s law to find the resistance of each resistor.
As per required current, the number of resistors
Number of resistors that must be removed
Conclusion:
Thus, C must remove 5 lamps.
Chapter 23 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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