a) Why are ammeters made as small as possible, and voltmeters as high as possible? b) When measuring the current in the circuit, the student took a voltmeter instead of an ammeter and turned it on the way an ammeter should be turned on. What happened then? c) When measuring the voltage on a section of the circuit, the student took an ammeter instead of a voltmeter and turned it on the way a voltmeter should be turned on. What happened then?
a) Ammeters are made from the smallest possible, and voltmeters from the greatest possible resistance, so that the inclusion of these devices does not noticeably change the value of the current strength and voltage in the circuit.
b) When the voltmeter is connected in series, the current in the circuit will sharply decrease. since the voltmeter has high resistance. There will be no dangerous consequences.
c) When the ammeter is connected in parallel, the current through the ammeter will increase sharply, because the ammeter has low resistance. The appliance will burn out.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.