These are 3 questions and 3 answers.

Question 1.

Answer: I = 0.01 A


a) Data:

i) Type of circuit: series

ii) R₁ = 100 Ω

ii) R₂ = 100 Ω

iii) V = 2 V

iv) I = ?

b) Formulas

i) Equivalent resistance, R = R₁ + R₂

ii) Ohm’s law, V = IR

c) Solution

i) R = 100Ω + 100Ω = 200Ω

ii) I = V / R = 2 V / 200Ω = 0.01 A

Question 2)

Answer: False.


The nuclear model of the atom states that the atom is neutral, and consists of a nucleus, which holds the protons and the neutrons, and the electrons which are around the nucleous (in regions called orbintals).

The electrons are negatively charged and the protons are positively charged.

The magnitudes of the charges of both electrons and protons are equal.

Therefore, for the atom be neutral, the neutrons cannot have charge.

Question 3.

Answer: oppose (or resist).


1) The most basic electrical circuit consists of a 1) potential difference (voltage) source, which gives the “impulse” to the charge to flow, 2) the wire, which is the medium through which the charge flows), and 3) a resistor.

The resistor is the element with “resistance” to the flow of charge, this is it resists or oppose the flow of charge.

Some components, like motors, filaments, buzzers, which content or are resistors per se, transform the current (flow of charge) in other useful forms of energy (motion, light, heat, sound).

The resistor meets Ohm’s law which states R = V / I, at constant temperature.