What will happen when i interchange ammeter and volmeter?ammeter in parallel and voltmeter in series con.?
Answer:
If the ammeter is unfused, it will probably blow. I've done this a couple times in my career, downright embarassing and sometimes expensive
The voltmeter will just look like an open switch - no problem.
an tiny Explosion in lab. nothing much !
You may burn the ammeter. Here is why:
The voltmeter is a high resistance device so that it draws negligible current and doesn't introduce significant error in voltage measurement. Hence it is to be connected in parallel.
The ammeter is a low resistance device so that it does not significantly affect the current flowing through the circuit. Hence it is to be connected always in series.
If you reverse them, the voltmeter being in series offers a high resistance and most of the current will flow through the ammeter which may not withstand the high current and may thus get burnt out.
First of all, let us assumed that the ammeter has a very low resistance almost 0 ohm while the voltmeter has very high resistance more than megaohms. So, if you will connect this two in same manner as you said. Then, you are like short circuiting the circuit and at same time opening the circuit. Therefore, it depends upon on which is connected first and which one is nearest to the supply point. If the ammeter is connected first and nearest to the supply then the circuit is shorted and tripped the circuit breaker of that line. But if the voltmeter is connected first and nearest to the supply then it will not blow anything but the circuit will not work. Due to no current will flow into the load.
Putting a voltmeter in series with your circuit will give you an inaccurate reading (its high resistance will likely dominate the total impedence of the circuit you're measuring).
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