24 Questions

.

Questions and Answers

- 1.When an object is positively or negatively charged, it has ______ electricity
- 2.Positively charged objects have ____ electrons, negatively charged objects have ______ them
- A.
Lost, gained

- B.
Gained lost

- 3.Charged objects attract neutral (uncharged) objects
- A.
True

- B.
False

- 4.Match the terms
- A. Like charges

- A.

- B. Opposite charges

- B.

- 5.Charge can be produced by fr______
- 6.Negatively charged objects discharge if touched by a conductor - like a metal or a person. This is because electrons like to move through these - they want to get to earth
- A.
True

- B.
False

- 7.Lightning and sparks are caused by a discharge of electrons between positive and negative regions, or when the electrons 'jump' between a charged object and conductor.
- A.
True

- B.
False

- 8.Match the definitions with their respective terms
- A. Difficult for electrons to flow through

- A.

- B. Easy for electrons to flow through

- B.

- 9.What's the following apparatus?
- A.
Electrical ball

- B.
Electrical generator

- C.
Van De Graaff generator

- D.
Power ball

- 10.This shows the stages of how a ___________ works
- 11.Match the electrical symbols with their respective terms
- A. Top left

- A.

- B. Top middle

- B.

- C. Top right

- C.

- D. Middle left

- D.

- E. Middle middle

- E.

- F. Middle right

- F.

- G. Bottom left

- G.

- H. Bottom middle

- H.

- I. Bottom right

- I.

- 12.Match the definitions with their terms
- A. Electrons flow from negative terminal to positive terminal

- A.

- B. Electrons flow from positive terminal to negative terminal

- B.

- 13.Current is the flow of _____x_____, the bigger the current, the _____y_____ electrons are flowing around the circuit.
- A. x

- A.

- B. y

- B.

- 14.What happens to the CURRENT in a SERIES circuit
- A.
It stays the same throughout

- B.
It changes depending on equipment

- C.
It usually stays the same

- D.
Is usually changes

- 15.For a PARALLEL circuit, the current that leaves is the SAME as the current that returns. Current divides into half when it has 2 routes but it eventually meets in the end
- A.
Yep

- B.
Nope

- 16.Voltage is a measure of how big of a push the electrons are given as they leave the cell of battery, can also be thought of as energy
- A.
True

- B.
False

- 17.Select some things which can produce the voltage
- A.
Cell

- B.
Lamp

- C.
Battery

- D.
Power supply

- 18.How does voltage work in a series circuit?
- A.
The sum of voltages across each component add up to the voltage across the entire battery

- B.
The voltage is the same throughout

- 19.For a PARALLEl circuit, the VOLTAGE across the battery is the same as the voltage across each branch
- A.
True

- B.
False

- 20.What does Ohm's Law tell us?
- A.
As the voltage increases, the current also increases - proportionally

- B.
As the voltage increases, the current decreases - proportionally

- C.
Technically, its none of the above

- 21.V = Voltage, I = Current, R = Resistance. Given that V = IR, deduce the formulas for the rest of the terms
- A. V

- A.

- B. I

- B.

- C. R

- C.

- 22.In general, for a series circuit, what's the total resistance, R_T?
- A.
R_T = (R_1) * (R_2) * (R_3) * ... * (R_n)

- B.
R_T = (R_1) / (R_2) / (R_3) / ... / (R_n)

- C.
R_T = R_1 + R_2 + R_3 + ... + R_n

- D.
1/(R_T) = 1/(R_1) + 1/(R_2) + 1/(R_3) + ... + 1/(R_N)

- 23.In general, for a parallel circuit, whats the total resistance R_T?
- A.
R_T = R_1 + R_2 + R_3 + ... + R_n

- B.
1/(R_T) = 1/(R_1) + 1/(R_2) + 1/(R_3) + ... + 1/(R_n)

- C.
R_T = (R_1) * (R_2) * (R_3) * ... * (R_n)

- D.
R_T = (R_1) / (R_2) / (R_3) / ... / (R_n)

- 24.Calculate the total resistance. Leave your answer as a fraction. Your answer is in Ω (Ohms). (Here's a hint: 1/(R_t) = 1/12 + 1/18 + 1/6 = 3/36 + 2/36 + 6/36)