1) Two light bulbs LI and L2 are connected in a circuit as shown in the diagram, and both are lit up. The switch is now closed. The intensity of the bulbs will become: A) L1 will be dimmer; L2 will go out B) L1 will be brighter; L2 will go out 2 C) Ll will be unchanged; L2 will go out D) L1 will be unchanged; L2 will be brighter E) Ll and L2 will be unchanged in brightness 2) Electrical energy gets from the generating station to Siva's house by passing through 8 transformers which change its voltage. If each transformer is only 95% efficient, what is the total energy loss due to these transformers? A) 5.0% B) 14% C) 34% D) 38% E) 40% 3) A high intensity lamp operates at 12 volts and has a power of 30 W. It is operated by an ideal transformer plugged into the 120 VAC supply. What is the current in the primary circuit? A) 40 mA B) 250 mA C) 400 mA D) 25 A E) 48 A 4) The resistance of a hot dog, 15 cm long and 2.0 cm in diameter, is measured to be 9.0 Q. What would be the resistance of a jumbo hot dog that is 30 cm long and 3.0 cm in diameter? (Assume a constant hot dog resistivity). A) 18 0 B) 8.09 C) 6.0Q D) 2.7 2 E) 1.8 2