Two resistors are connected in series and then in parallel. What affect will it have on the readings of ammeter and voltmeter?
When resistors are connected in series
When the resistors are connected in series, then, equivalent resistance of the circuit is greater than the greatest resistance used in the circuit. Thus, the circuit offers large resistance. So, ammeter will show less value of current(low reading). But, in series combination, voltage across different resistors is different. So, the reading of voltmeter depends on the value of resistor across which it is connected.
When resistors are connected in parallel
When the resistors are connected in parallel, then, equivalent resistance of the circuit is less than the least resistance used in the circuit. Thus, the circuit offers less resistance. So, ammeter will show high value of current(high reading). In parallel combination, voltage across different resistors is same. So, the reading of voltmeter will be equal to the voltage of power supply.
When the resistors are connected in series, then, equivalent resistance of the circuit is greater than the greatest resistance used in the circuit. Thus, the circuit offers large resistance. So, ammeter will show less value of current(low reading). But, in series combination, voltage across different resistors is different. So, the reading of voltmeter depends on the value of resistor across which it is connected.
When resistors are connected in parallel
When the resistors are connected in parallel, then, equivalent resistance of the circuit is less than the least resistance used in the circuit. Thus, the circuit offers less resistance. So, ammeter will show high value of current(high reading). In parallel combination, voltage across different resistors is same. So, the reading of voltmeter will be equal to the voltage of power supply.