The slope of the line gives the value of resistance (R)
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Question 8:
When a battery is connected across an unknown resistor, there is a current of in the circuit. Find the value of the resistance of the resistor.
Answer:
According to Ohm’s law,
Therefore,
Question 9:
A battery of is connected in series with resistors of respectively. How much current would flow through the resistor?
Answer:
Total resistance of resistors when connected in series is given by
According to Ohm’s law,
There is no current division occurring in a series circuit. So, the current through the resistor will be same as
Question 10:
How many resistors (in parallel) are required to carry line?
Answer:
Let the total number of resistors be x.
Given that:
Current and Potential Difference
According to Ohm’s law,
⟹
Now for x number of resistors of resistance, the equivalent resistance of the resistors connected in parallel is
Therefore, 4 resistors of are required to draw the given amount of current.