To choose: The correct option.
Answer to Problem 6STP
The correct option is (B), no change.
Explanation of Solution
Given:
A simple resistor based circuit with voltage and resistance being reduced by half the original value.
Formula used:
According to Ohm’s law, the voltage in a resistor based circuit, V is directly proportional to the current flowing through it I ,and the proportionality factor is the resistance of the circuit R. It can be expressed as,
Calculation:
Now, when voltage and resistance is halved, the above equation becomes,
Comparing with the original current value, the above equation suggests that there is no change in the current and hence,
Conclusion:
The correct option representing the effect on current when both voltage and resistance is halved is (B), no change .
Chapter 22 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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