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Exam 1 Review EE301 Exam 1 Review 05FEB14 1) If 85 Joules of Energy is required to move 368 Coulombs of charge, what is the Voltage Potential created? 2) Through a given surface of a conductor cross section area, 15 mA of current passes at a rate of 200 µs. What is the amount of charge? 3) A 6 V battery has a rating of 52 A-h. What is the average amount of current if the battery is drained after operating for 145.8 minutes? 4) What is the Voltage across a 220 Ω resistor if 15 mA passes through it? 15 mA + V 220 Ω - 5) According to Ohm’s Law, what is proportional to Current if Resistance is constant? 6) Find 𝑹𝑹𝑶𝑶 for the circuits below. a. 60 Ω 15 Ω 28 Ω 19 Ω 6Ω 𝑅𝑅𝑇𝑇 b. 10 Ω 25 Ω 50 Ω 20 Ω 16 Ω 28 Ω 22 Ω 𝑅𝑅𝑇𝑇 32 Ω c. 24 Ω 18 Ω 4Ω 12 Ω 𝑅𝑅𝑇𝑇 9Ω 18 Ω 14 Ω 7Ω 7) Find the quantities for the circuit below. Supply (𝑷𝑷𝑰𝑰𝑰𝑰 ) + - 30 V ƞ𝒐𝒐 Stage 1 80 Ω Stage 2 Load (𝑷𝑷𝑶𝑶𝑶𝑶𝑶𝑶 ) 10 Ω 𝑰𝑰𝟏𝟏 𝑰𝑰𝑺𝑺 ƞ𝟏𝟏 Stage 3 100 Ω 𝑰𝑰𝟐𝟐 ƞ𝟐𝟐 a. Find 𝑰𝑰𝑺𝑺 b. Find 𝑷𝑷𝑰𝑰𝑰𝑰 c. Find 𝑰𝑰𝟏𝟏 , 𝑰𝑰𝟐𝟐 , 𝑰𝑰𝟑𝟑 , and 𝑰𝑰𝑳𝑳 (Hint: Use Current divider) 200 Ω ƞ𝟑𝟑 𝑰𝑰𝟑𝟑 𝑰𝑰𝑳𝑳 200 Ω ƞ𝑳𝑳 25 Ω d. Find 𝑷𝑷𝑳𝑳𝒐𝒐𝒔𝒔 𝟏𝟏 at Stage 1, 𝑷𝑷𝑳𝑳𝒐𝒐𝒔𝒔 𝟐𝟐 at Stage 2, and 𝑷𝑷𝑳𝑳𝒐𝒐𝒔𝒔 𝟑𝟑 at Stage 3 e. Find 𝑷𝑷𝑶𝑶𝑶𝑶𝑶𝑶 f. Calculate Total Efficiency (ƞ𝑶𝑶𝒐𝒐𝒕𝒂𝒍 ) of the circuit g. Calculate the Efficiency at each Stage (ƞ𝟏𝟏 , ƞ𝟐𝟐 , ƞ𝟑𝟑 , 𝑎𝑛𝑑 ƞ𝑳𝑳 ). Hint: for each stage 𝑷𝑷𝑰𝑰𝑰𝑰 is the 𝑷𝑷𝑶𝑶𝑶𝑶𝑶𝑶 from the previous stage. 𝑷𝑷𝑶𝑶𝑶𝑶𝑶𝑶 is 𝑷𝑷𝑰𝑰𝑰𝑰 − 𝑷𝑷𝑳𝑳𝒐𝒐𝒔𝒔 at that stage. h. Does ƞ𝑶𝑶𝒐𝒐𝒕𝒂𝒍 = ƞ𝟏𝟏 ∙ ƞ𝟐𝟐 ∙ ƞ𝟑𝟑 ∙ ƞ𝑳𝑳 ? 8) Use Voltage Divider ONLY to find all the voltages for the circuit below. Do not simplify the circuit. + + 25 Ω 60 V 𝑽𝑽𝟏𝟏 - + - 8Ω + 26 Ω 𝑽𝑽𝟐𝟐 - 12 Ω 9) Perform a Source Transformation on the Voltage Source and Current Source and then find 𝑰𝑰𝑿 . (Hint: Use Nodal Analysis to solve for 𝑰𝑰𝑿 after Source Transformation) 12 Ω 48 V + - 𝑰𝑰𝒙𝒙 + 6Ω - 8Ω 1.875 A 𝑽𝑽𝟒𝟒 + + 17 Ω 𝑽𝑽𝟑𝟑 𝑽𝑽𝟓𝟓 - 10) Find the Thevenin Equivalent from the 𝑹𝑹𝑳𝑳 perspective and draw the New Circuit. 20 Ω 6Ω 5Ω 4Ω 2A 𝑹𝑹𝑳𝑳