Hello mates!!
See the attachment, here I have created a circuit with 4 ammeters, 3 resistors, a key and a cell.
Now the question is that, will the reading of every ammeter same?
We know that current in series connection is same, but here every resistor will resist some current again one by one and thus making a difference in the ammeter.
Give your opinion also and justify it with perfect explaination!!
Good Luck :)
Answers
★ Solution :-
This question is quite tricky in it's nature. We can't solve without understanding the purpose of the ammeter and working of resistor . Let's understand them first and then come back to our answer.
• Working of a Ammeter ::
Ammeter is a device which checks the flow of current. Actually it checks the rate of flow of charger per unit time. The values are displayed in Ampere. A proper ammeter has no reading errors and thus displays correct value always.
• Working of a Resistor ::
Actually a proper resistor is a coiled substance which resists the flow of current. When the resistors are taken in combination, the net current of the circuit is mainted. In the qúestion it is clear that all the resistors are of different resistances. This means one can be more and other can be less. Even the resistors are connected in series. So the current flowing through them will be directly proportional to the potential difference between them. In series combination, we know that potential difference across the components gets divided but in series combination the current across the resistors will remain same. This means with teh effect or potential difference across each resistor and their individual resistances, the current across each component will remain same.
• Let's begin the answer of the qúestion ::
The qúestion raised is the resistors will offer different resistances, thus current across each component will change and reading of the ammeter will be changing.
Well the answer is No.
The answer is proved nearly in the working of resistor itself.
Actually we see that the resistors are connected in series. This means that by convection, the current across each component will be same. Now we need to prove this. We see that potential in the series combination, gets divided across the components. This means thag every resistor will have different potential difference. We know that ratio of Potential Difference and Resistance is the Current. This means the current across each component will be balanced. And the rule of current in series combination will also be satisfied. On this assumption the lower resistance resistor will have higher potential difference. And since the current will become same. So, current across each resistor will be same.
This means the reading of all ammeter will also be same. Also the net current of the circuit will also be same.
Hence proved.
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★ More to know :-
• Voltmeter : A device which measures the potential difference across two parts or a component in a circuit.
• Resistor : A device used to resist the flow of current in a circuit.
• Resistance : It is the tendency of a conductor to oppose the flow of current when current flows through it.
• Conductor : A body that allows the flow of current through it.
• Insulator : A body that doesn't allows the flow of current through it.
• Semi Conductors : These are the meterials which conduct electricity only at specific temperatures or on alloying.
Answer:
Electric current and potential difference
Electric circuits can be series or parallel. An ammeter measures current and a voltmeter measures a potential difference. Some materials have low resistance and are conductors; others are insulators.Explanation:other, without any branches.