1)Several resistors are connected in series. If a battery provides constant voltage in this circuit the addition of another resistor in series
a)increases current through each resistor
b)decreases current through each resistor
c)doesn't affect the current throught any resistor
d)doesn't affect the current throught some resistors
Isn't the correct answer B since it's in series?
2)Several resistors are connected in series. If a battery provides constant voltage in this circuit the addition of another resistor in series
a)increases voltage through each resistor
b)decreases voltage through each resistor
c)doesn't affect the voltage across any resistor
d)doesn't affect the voltage across some resistors
Isn't it A? V=IR and as R increases V also increases.
1) B You are right
2) B The total voltage across the whole series circuit is the same, so there is less voltage drop in each resistor.
For each resistor, I goes down and R stays the same.
One is correct. On the second, b would be a great answer if it read "decreases voltage across each resistor. Adding a resistor decreases total current, so (V=IR) means the voltage across the resistors decreases.
1) For the first question, the correct answer is actually option (c) - adding another resistor in series doesn't affect the current through any resistor.
When resistors are connected in series, the same current flows through each resistor. This is because the current has only one path to follow, and it experiences the same total resistance from the combined resistors. Adding another resistor in series simply increases the total resistance of the circuit, but the current remains the same.
To understand why, you can use Ohm's Law, which states that the current flowing through a resistor is equal to the voltage across the resistor divided by the resistance. In a series circuit, the voltage across each resistor is directly proportional to the resistance of that particular resistor. Therefore, when you add another resistor in series, the total resistance increases, but the applied voltage remains the same. As a result, the current through each resistor remains unchanged.
2) Now, let's move on to the second question. The correct answer is option (c) - adding another resistor in series doesn't affect the voltage across any resistor.
In a series circuit, the total applied voltage is distributed across all the resistors. Each resistor consumes a certain portion of this total voltage. When you add another resistor in series, the total resistance increases, but the applied voltage remains the same. As a result, the voltage across each resistor remains the same.
You are correct that Ohm's Law states V = IR, where V is the voltage, I is the current, and R is the resistance. However, in this case, we are considering the voltage across each individual resistor, not the total voltage. As long as the applied voltage remains the same and the resistors are in series, the voltage across each resistor remains unaffected by the addition of another resistor.