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EG1005 Electronics I (PRD1 A 2024/25)

EG1005 Electronics I (PRD1 A 2024/25)

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Doubling the length of a conductor

increases resistance by a factor of 4.

doubles the resistance.

cuts the resistance in half.

decreases resistance by a factor of 4.

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A closed circuit shows two battery supplies of 5 and 10 volts, three resistors, current supply and a ground. The following connections are in a clockwise direction from the negative end of the supply of 5 volts which is grounded: A resistor of 3 ohms, a point X from where the connection splits into two directions: the downward direction with a 7 ohms resistor and the rightward side shows a battery supply of 10 V whose negative end is connected to a resistor of 10 ohms. Current flow I subscript 1 and I subscript 2 are shown in clockwise direction.

See Figure. The equation obtained from performing mesh analysis on mesh #1 is

5 V - 3I1 - 7(I1 - I2) = 0.

5 V + 3I1 - 7(I1 - I2) = 0.

5 V + 3I1 + 7(I1 - I2) = 0.

5 V + 3I1 + 7(I2 - I1) = 0.

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The effect of connecting an additional series load to an electrical supply source is to increase the:

voltage of the source

current taken from the

source

resistance of the load

the internal resistance of the source

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Calculate the Voltage Vx across the 5 ohm resistor shown in the figure above.

10V

1.25V

100V

2.5V

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See the electric circuit in the figure below. The equation that describes node #2 (associated with V₂), using nodal analysis, is:

node-voltage

2V₁+3V₂+30=0

-2V₁-3V₂+30=0

-2V₁+3V₂+30=0

-2V₁+3V₂-30=0

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The total equivalent resistance of a parallel circuit is

less than the smallest branch resistance

equal to an average of the branch resistances

equal to the total resistance of all resistors

larger than the sum of all the resistances

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Thevenin resistance is found by ________

Shorting all voltage sources and opening all

current sources

✅

Opening all voltage sources and shorting all

current sources

❌

Opening all current sources

❌

Shorting all voltage sources

❌

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See Figure above. When the current source is converted to a voltage source, the equivalent series resistance is

A colour coding of orange-blue-brown-silver on a resistor indicates a value of:

360 Ω±10%

360Ω±20%

360Ω

36 Ω±20%

See Figure. Using the superposition theorem, what is the portion of the current through the 6 Ω resistor caused by the 10 V battery?

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