Tutorial 1 Question 1 If a given resistor in the lab has the following colours bands from left to right, what is its value? ( Yellow, Purple, Red, Gold)

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Presentation transcript:

Tutorial 1 Question 1 If a given resistor in the lab has the following colours bands from left to right, what is its value? ( Yellow, Purple, Red, Gold) Answer = 4700 Ohms 5%

Question 2 If a given resistor has a brown band to indicate its tolerance, what does that signify? Answer = 1% Tolerance

Question 3 Given that the circuit in the figure below is valid, which sources are absorbing power? How much power in total is being absorbed in the above circuit in the previous question? Answer = The 10V and 50V sources Answer = 300W

Question 4 In the series circuit shown in the figure above, 1.what is the value of the current i 5, 2.what is the voltage, v 5 3.what is the value of the voltage v 2 4.what is the total power dissipation 1.Answer = 24/12 = 2A 2.Answer = 2x7 = 14V 3.Answer = 2x3 = 6V 4.Answer = 24x2 = 48W

Question 5 In the voltage divider circuit above, 1.what is the voltage, v o 2.what is the power dissipated in the 100kW resistor R 2 1.Answer = 100(100/125) = 80V 2.Answer = V 2 /R = 6400/1e5 = 64mW

Question 6 For the current divider circuit above, 1.State the current, i o 2.State the power generated by the 10A current source 1.Answer = 10(16/20) = 8A 2.Answer = -320W

Question 7 For the circuit above. 1.Determining the total equivalent resistance 2.calculate the current i a 3.calculate the current, i b 4.calculate the voltage, v o 1.Answer = 4+20||80 = 20 Ω 2.Answer = 2.5(80/100) = 2A 3.Answer = 2.5(20/100) = 0.5A 4.Answer = 2.5(20/100) = 0.5A

Question 8 For the parallel circuit above 1.what is the voltage across the current source 2.what is the current flowing through the 30W resistor 1.Answer = 4x30 = 120V 2.Answer = 120/30 = 4A

Question 9 In the Wheatstone bridge circuit above, R 1 = 1000 Ω, R 2 = 2000 Ω, R 3 is adjusted so that the voltmeter reads 0V (i.e. the bridge is "balanced"), at this point R 3 = 2000 Ω. Given this information state the value of R x Answer = R 2 xR 3 /R 1 = 4000 Ω

Question 10 This question relates to source transformations. The circuit above contains an independent voltage source and three resistors. By making a series of source transformations, or otherwise, 1.determine the Thévenin equivalent voltage and resistance. 2.determine the Norton equivalent current and resistance 1.Voltage = 48VResistance = 16 Ω 2.Current = 3AResistance = 16 Ω