If you are building a circuit and have two 10 Ω resistors, which connection method will provide the most resistance? A. The same

B. Parallel

C. Series

The person that answered before me is right except for question 1

1.    5.9 Ω

2.   0.72 A

3.   2.4 V

4.   R1

5.   RC circuit

6.   2.0 W

7.   R4

Explanation:

I took the test and I got question 1 wrong. (K12 Physics sem 2 8.05)

Let's start by calculating the equivalent resistance of the three resistors in parallel, :

From which we find

Now all the resistors are in series, so the equivalent resistance of the circuit is the sum of all the resistances:

So, the correct answer is D)

2) Let's start by calculating the equivalent resistance of the two resistors in parallel:

From which we find

And these are connected in series with a resistor of , so the equivalent resistance of the circuit is

And by using Ohm's law we find the current in the circuit:

So, the correct answer is C).

3) Let' start by calculating the equivalent resistance of the two resistors in parallel:

From which we find

Then these are in series with all the other resistors, so the equivalent resistance of the circuit is

And by using Ohm's law we find the current flowing in the circuit:

And so the voltage read by the voltmeter V1 is the voltage drop across the resistor 2-3:

So, the correct answer is D).

4) Again, let's start by calculating the equivalent resistance of the two resistors in parallel:

From which we find

Now all the resistors are in series, so the equivalent resistance of the circuit is:

The current in the circuit is given by Ohm's law

Now we can compare the voltage drops across the resistors. Resistor 1:

Resistor 2 and resistor 3 are in parallel, so they have the same voltage drop:

Resistor 4:

So, the greatest voltage drop is on resistor 1, so the correct answer is D).

5) the figure shows a circuit with a resistor R and a capacitor C, so it is an example of RC circuit. Therefore, the correct answer is D).

6) The circuit is the same as part 4), so the calculations are exactly the same. Therefore, the power dissipated on resistor 3 is

So, correct answer is B).

7) The circuit is the same as part 4), so we can use exactly the same calculation, and we immediately see that the resistor with lowest voltage drop was R4 (2.50 V), so the correct answer is B) R4.

carbon is found in all living things. carbon atoms move constantly through

living organisms, the oceans, the atmosphere, and the earth’s crust in what is

known as the carbon cycle. the directions taken by carbon atoms through this

cycle are very complicated and can take millions of years to make a full circle.

all animals, from humans to the dinosaurs are part of the carbon cycle. when

animals eat food, they get carbon in the form of carbohydrates and proteins.

in animals, oxygen combines with food in the cells to produce energy for daily

activity and then gives off carbon. the carbon combines with oxygen to form

carbon dioxide (co2) and is released back into the atmosphere as a waste

product when animals breathe and exhale.

from 145-65 million years ago, earth was much

hotter than today and covered with dense,

tropical swamp forests. the trees and other

plants were immense and

provided an endless supply of

food for the giant animals that

roamed the land. somewhere in

the air above one of these

forests, a lone carbon atom has joined

up with two oxygen atoms to form a molecule of co2.

the co2 molecule was sucked into the tiny holes (stomata) on the leaf of a

fern plant and joined with sunlight, chlorophyll and water to make food and

energy in the plant’s cells through photosynthesis. the oxygen (o2) from the

co2 molecule was sent back into the atmosphere; the carbon atom (c) was

detached and used to make a molecule of sugar.

if that carbon atom had been eaten instead, a totally

different situation would have developed. let’s say

that a giant plant-eating dinosaur (herbivore) ate the

fern for breakfast, and swallowed the carbon in the

fern in the form of carbohydrates and proteins. in

the process of respiration, oxygen combined with

the carbohydrates and proteins in the dinosaur’s cells

to provide energy for its daily activity.  

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible