If the ammeter in the given circuit shown in the diagram reads 2A, the resistanceR is

A 6.5-ohm resistor, an unknown resistor, R, and two ammeters, A1 and A2, are connected as shown below with a 18-volt source. Ammeter A2 reads a current of 10.0 amperes.a. Calculate the current measured by ammeter A1 in the diagram shown.b. Calculate the resistance of the unknown resistor, R in the diagram shown. c. Determine the equivalent resistance of the circuit shown.

Look at the diagram below. Calculate the present resistance of the variable resistor if the ammeter is reading 0.8A.ohms

The diagram shows an electric circuit with two resistors, P and Q. Some of the values of thecurrent are also shown.i) On the diagram draw a voltmeter to measure the potential difference of resistor QRemember: Voltmeters are always attached in parallel to the componentThe voltmeter is drawn in redii) Deduce the readings on the ammetersRemember: Current is conserved at a junction: current in = current out0.80A enter the junction, and 0.30A go through resistor PReading at A1 = 0.80 - 0.30= 0.50 AReading at A2 = same as current entering junction= 0.80A

The two resistors are now connected in parallel. Calculate the new reading on the ammeter when S is closed, stating clearly any equations that you use.

The value of R is adjusted until the current in the circuit is 2 mA. Calculate the resistance of the variable resistance under this condition.