i need help on all the questions please help thanks Describe In your own words K
ID: 1337071 • Letter: I
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i need help on all the questions please help thanks
Describe In your own words Kirchhoff's loop rule and junction rule. 2. Draw a circuit consisting of two light bulbs in series and a power supply and show how you will connect ammeters to measure current through each bulb and voltage across each bulb. 3. What does the term short circuit mean? Why is it dangerous to short circuit a power supply? 4. Meg says that if an ammeter is connected correctly to measure current in the circuit, then a bad contact in one of the wires leading to the ammeter would make the circuit open and there will be no current in it. However if the same thing happens to the voltmeter, the circuit would work with no problem. Do you agree with Meg? Explain.Explanation / Answer
1)
I st law:At any junction in an electric circuit,the sum of the currents flowing into the junction is equal to the sum of the currents flowing out of the junction.
IInd law:The directed sum of the electric potential diffrences(voltages) around any closed net work is zero.
3)
In an electrical circuit in a device of lower resistance than that of a normal circuit, especially one resulting from the unintended contact of components and consequent accidental diversion of the current. Or A short circuit is a abnormal low resistance connection between to nodes of an electric circuit that meant to be different voltages.
If you do have a load in the current, the current flow through your circuit will be limited to that which your device consumes, which is usually a very small amount. However, if you don't put anything in to restrict the current flow, there won’t be anything to slow down the current, and it will try to be infinite!
Your power supply can’t provide infinite current, but it will provide as much as it can, which may be a lot. This could cause your wire to burn up, damage the power supply, drain your battery, or other exciting things. Most of the time your power supply will have some sort of safety mechanism built into it to limit the maximum current in the event of a short circuit, but not always. This is the reason all homes and buildings have circuit breakers, to prevent fires from starting in the event of a short circuit somewhere in the wiring.
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