**Exercise2**

1. Suppose
that the dc generator in Figure 1 produces 10 V and the potentiometer is set to
a value of 10 ohms. What is the current? 1 A

2. Imagine
that dc generator in Figure 1 produces 100 V and the potentiometer is set to 10
kiloohms. What is the current? 10 mA

3. Suppose
that dc generator in Figure 1 is set to provide 88.5 V, and the potentiometer
is set to 477 Megaohms. What is the current? 0.186 uA

4. Suppose
the potentiometer in Figure 1 is set to 100 ohms, and the measured current is
10 mA. What is the dc voltage? 1 V

5. Adjust
the potentiometer in Figure 1 to a value of 157 kiloohms, and suppose the
current reading is 17.0 mA. What is the voltage of the source? 2.67 KV

6. Suppose
you set the potentiometer in Figure 1 so that the meter reads 1.445 A, and you
observe that the potentiometer scale shows 99 ohms. What is the voltage? 143.055 V

7. If the voltmeter in Figure 1 reads 24 V and the ammeter shows 3.0 A, what is the
resistance of the potentiometer? 8 ohms

8. What is the value of the resistance in Figure 1 if the current is 18 mA and the voltage is 229 mV? 13 ohms

9. Suppose the ammeter in Figure 1 reads 52 uA and the voltmeter indicates 2.33 kV.
What is the resistance? 45
Megaohms

10. Suppose that the voltmeter in Figure 1 reads 12 V and the ammeter shows 50 mA. What is the
power dissipated by the potentiometer? 0.60 W

11. If the resistance in the circuit of Figure 1 is 999 ohms and the voltage source delivers 3 V, what is the
power dissipated by the potentiometer? 9 mW

12. Suppose the resistance in Figure 1 is 47 kiloohms and the current is 680 mA. What is the power
dissipated by the potentiometer? 22 KW

13. How much voltage would be necessary to drive 680 mA through
a resistance of 47 kiloohms? 32 KV

14. Consider five resistors in parallel. Call them R1 through R5. Let the resistance values be as follows:

*R*1 = 100 ohms,*R*2 = 200 ohms,*R*3 = 300 ohms,*R*4 = 400 ohms, and*R*5 = 500 ohms. What is the total resistance? 43.8 ohms
15. cont.... What is the
total conductance? 0.02283 S or Mho

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