# SOLVED PHY301 Assignment 1 Solution and Discussion

• Assignment 1(Spring 2020)
Circuit Theory (Phy301)
Marks: 25
Due Date: May 29, 2020
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Q: 1:
For the given below circuit, Calculate the Equivalent resistance and current of the circuit.

Q: 2:

Find power dissipated through energy saver having resistance 8Ω, in given below network.

Q: 3:
(I) What causes positive and negative charge?
(II) How the electrons in last orbit of an atom responsible for stability of an atom.

• Q: 3:
(I) What causes positive and negative charge?
(II) How the electrons in last orbit of an atom responsible for stability of an atom.

(I) An atom is generally considered neutral having equal no of electrons and protons.
When an atom loses electron(s) it becomes positively charged and when an atom gains electron(s), it becomes negatively charged. In other words, deficiency of electron causes positive (+) charge and addition of electron causes negative (-) charge.
(II) Electrons in outer orbit, also called valence electrons are loosely bound to its nucleus and can share to nearby outer orbit electrons of another atom. The atom is considered unstable as they share electrons to another atom. An atom of tightly bound electrons is more stable.

• Q: 2:
Find power dissipated through energy saver having resistance 8Ω, in given below network.

• Q: 1:
For the given below circuit, Calculate the Equivalent resistance and current of the circuit.

Solution:
Calculating the Equivalent resistance
Reduce the circuit to one equivalent resistance value.
R1 and R2 are connected directly in parallel and can be replaced with an equivalent resistor,

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