A regular household is using a refrigerator with a power rating of 250 Watts. i. Ifit supplied with 220 V, compute the total resistance of the refrigerator. ii. If it supplied with 110 V, compute the total current flowing through the refrigerator. iii. Zameco is charging P2.50 per kWh. How much will the user pay if it consumes 66 hours?

1. An experiment was performed to investigate how the resistance of a material wire varies with the temperature. The following data was recorded. Resistance/2 Temperature Theory suggests that the resistance of the wire is related to its temperatui by the expression, R = R,(1 + at), where Ro, is the resistance at a temperature, 0°C, and a is a constant. 330.0 10 340.0 20 (a) Plot a suitable graph from which Ro and a could be obtained. 350.0 30 (b) Use the graph to obtain the values of R, and a (c) Say whether this material is a conductor or semiconductor. 360.0 40 370.0 50 380.0 60 389.0 70 400.0 80 410.0 85

Consider the following circuit diagram. The potential difference across the battery is 40.0 volts, and it supplies a current of 5.00 amperes to the circuit. There is a current of of 2.70 amperes flowing through R1. Resistor R2 has a resistance of 5.50 ohms. What is the resistance of R3? Answer in ohms to two decimal places, but do not include units in your answer.

Two aluminum wires have the same resistance. If one has twice the length of the other. What is the ratio of the diameter of the longer wire to the diameter of the shorter wire? O A. 1.41 О в. 2 OC. 0.71 D. 0.5 O E. None

F₁ = L1, B₂ чт вът Різі чом =1032 V R -Gv 100 qüdrh I 1 R2 R23 2. Four resistors and a 6.0-V battery are arranged as shown in the circuit diagram. Find the equivalent resistance of the circuit b. Find the current through the 10-Ohm resistor a. sonsufit c. Find the power delivered to the 10-Ohm resistor R₁-4092 -18V -18V 13 C+ D B=6V 6VI Azov I=I1 + 0.64 AQUOS to 218-12 = 30 I H = -1 R4-2002 14. 0.64 1₂V R₂-3002 -IA F 12V E R3=1092 holong s vivang to 6 DS sailwaqogani THOS T20 3. A horizontal wire of length 6.0m carries a current of 6.0A and is oriented so that Forth's magnetic field is due north at this

A resistor of unknown resistance is in series with a 20.00 resistor. A battery of emf 6.0V and negligible internal resistance is connected across the combination. The battery provides a current of 0.80 A. What is the unknown resistance? O a. 15 Q O b. 50 O c. 10Q O d. 12 Q

1. While repairing an electric bulb socket, an electrieian gets a mild shock when a current of. 0.005 A passes through him. The same electrician is killed by a current 0.15 A when he turned on an electric bulb while taking a bath. The voltage in cach situation is equal to 120 V. Find the resistance of the electrician in each situation.

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In the circuit in the figure below, the batteries have negligible internal resistance. (Take R, = 2.55 N, R2 = 4.15 N, and R3 = 5.70 n.) R2 R1 12.0 V= R 12.0 V b (a) Find the magnitude of the current in each resistor. I2.550 = A I4.150 = A. I5.700 = A (b) Find the magnitude of the potential difference between points a and b. V (c) Find the power supplied by each battery. left battery right battery

Two aluminum wires have the same resistance. If one has twice the length of the other. What is the ratio of the diameter of the longer wire to the diameter of the shorter wire? O A. 0.71 В. 1.41 О С. 2 D. None O E. 0.5