7) Kirchoff's loop rule may be applied to the circuit shown. R 2R R 28 Which is the correct equation to represent the dotted loop? A) 0- 3RI, -281, B) 0- 3RI, +281, C) = 2RI, -RI. D) = 2RI, + RI. 8) If there are 16 volts of electrical potential across the points x and y in the circuit shown, what will be the current though the 120 resistor? 40 1212 X 40 40 A) 1A B) 2A C) 3A D) 4A9) Consider the circuit shown below. The battery of emf, z , has no significant internal resistance. R 2R 2R 2R The current through and the voltage across the resistor labelled x will be Current Through Voltage Across A) TR B) 7R 28 C) TR D) 7.R 10) A non-ideal ammeter has a resistance of R in the circuit shown. 3 R R R What will be the reading on the ammeter? B) 28 C) 26 26 3.R SR D)11) A non-ideal voltmeter with resistance R is used to measure the voltage across a resistor R as shown. The power source has an emf, , and negligible internal resistance. E R The reading of the voltmeter will be A) = B) D) 12) Four equal resistors w, x, y and z, are connected as shown. E X y W Z Which correctly ranks the power consumed by each resistor. A) z> x y >W B) w>xy>Z C) W>z> x=y D) Z>W>X=y13) A 120 rheostat has a 60 resistor connected at across it from it midway position as shown. 6V 12 0 Rheestat power supply voltmeter What will be the reading on the voltmeter? A) 2V B) 3V C) 4V D) 6V 14) A variable resistor that can range between O - 8 ohms is connected in series with an 8 ohm resistor as shown. an 12V What is the possible range of voltages across the 8 ohm resistor? A) 0 - 3V B) 0 - 6V C) 3-6V D) 6 - 12 V15) A 12 V source source with negligible internal resistance is connected as shown in the circuit. The voltmeter is ideal. What would be the reading on the voltmeter? A) 2V B) 4V C) 6V D) BV