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# Assignment 1(Fall 2013)

Circuit Theory (Phy301)

Marks: 25

Due Date: November 18, 2013

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Q 1:

Find the equivalent resistance RT of given circuit and current flowing through equivalent circuit. Write each step of the calculation to get maximum marks. Draw the circuit diagram of each step otherwise you will loose marks.

Q 2:

Determine the voltage and current across 2kΩ resistor for the given circuit. Mention the units of calculated value.

Q 3:

1.              I.      Write the differences between alternating current (AC) and direct current (DC).

1.           II.       A 12V battery is connected across two series resistances of value 2kΩ and 6kΩ. Determine the voltage drop across 6kΩ resistor.

1.        III.      What does the term “Conventional current” and “Electron current” mean?

……………………………………………

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### Replies to This Discussion

Q no 3(b)

A 12V battery is connected across two series resistances of value 2kΩ and 6kΩ. Determine the voltage drop across 6kΩ resistor.

first find the total resistance 2k + 6K = 8K

so the current through them is I = V / R = 12 / 8000 = 0.0015 amps

so across the 6k resistor with 0.0015 amps flowing through it, is V = I x R = 6000 x 0.0015 = 9 volts

sumj ni aya kasy hua hy?

Q no 3(c)

Electron Current:

Electrons are negative and flow from negative to positive. 'Conventional' current flow is from positive to negative. This is because early researchers in electricity thought electricity flowed from positive to negative, which is why they called them that in the first place.

Conventional Current, it is assumed that current will flow out of the positive terminal. It will proceed around the circuit, and under the right conditions, will end up at the negative terminal. The fuse that is present right after the positive terminal would therefore protect the circuitry from an event that would create excess current that would otherwise damage it.

now this is the Final Solution ,,,hope Its helpful now :)

Thanks and regards ,

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