ESc201A: Introduction to Electronics Assignment-1 · PDF file5A Fig. 3 4.Determine the power...

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Transcript of ESc201A: Introduction to Electronics Assignment-1 · PDF file5A Fig. 3 4.Determine the power...

Page 1: ESc201A: Introduction to Electronics Assignment-1 · PDF file5A Fig. 3 4.Determine the power dissipated in the 10 resistor in Fig. 4. 5A 2 4 + V 1 V 1 10 Fig. 4 5.Three appliances:

ESc201A: Introduction to ElectronicsAssignment-1

1. Find the equivalent resistance between X and Y in the circuit shown in Fig. 1 whereR1= 8Ω, R2=R3=2Ω, R4=7Ω.

R4

R2

R3

R 1

X YFig.1

2. In Fig. 2a and Fig. 2b, R1=50Ω, R2=500Ω, R3=100Ω, R4=50Ω, R5=25Ω and R6=50Ω.

(a) Use current division to find current through R5 in Fig. 2a. Given I=5mA.

(b) Use voltage division to find voltage across R2 in Fig. 2b. Given V=10V.

I

R1 R4

R2

R3

R5

R6

Fig. 2a

+−V

R1 R4

R2

R3

R5

R6

Fig. 2b

3. The digital multi-meter (DMM) is a device commonly used to measure voltages. It isequipped with two leads (usually red for the positive reference and black for the negativereference) and an LCD display. Let’s suppose a DMM is connected to the circuit of Fig.3with the positive lead at the top node and the negative lead on the bottom node. UsingKCL, explain why we would ideally want a DMM used in this way to have an infiniteresistance as opposed to zero resistance.

Page 2: ESc201A: Introduction to Electronics Assignment-1 · PDF file5A Fig. 3 4.Determine the power dissipated in the 10 resistor in Fig. 4. 5A 2 4 + V 1 V 1 10 Fig. 4 5.Three appliances:

5A

Fig. 3

4. Determine the power dissipated in the 10Ω resistor in Fig. 4.

5A

+

V1

5V1 10Ω

Fig. 4

5. Three appliances: an 850W coffee maker, a 1200W microwave oven, and a 900W toasterare connected in parallel to a 120V circuit with a 15A circuit breaker.

(a) Draw a schematic diagram of this circuit.

(b) Which of these appliances can be operated simultaneously without tripping thecircuit breaker?

6. Find VO in Fig. 6 using Nodal Method.

+−16V

8Ω 12A

12Ω

+

VO

Fig. 6

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