18.2 Physics

Question 1

What’s the equation for the total current in the circuit?

Answer 1

I = V/R

delta V

Question 2

Do resistors in series carry the same current?

Answer 2

Yes

Question 3

When many resistors are connected in series…

Answer 3

the current in each stays the same

Question 4

The total current in a series circuit depends on what?

Answer 4

It depends on how many reisstors are present and on how much resistance each offers

Question 5

What is the total resistance in a circuit called?

Answer 5

Equivalent resistance

It’s the sum of total resistance

Question 6

What’s the equation for voltage in series?

Answer 6

Delta V = Delta V1 + Delta V2…
or = I1R1 + I2R2…

but coz current is the same for both, it can equal I(R1+R2)

Question 7

The equivalent resistance of a series combination of resistors is always…

Answer 7

greater than any individual resistance

Question 8

Solve sample problem A page 637

Answer 8

Good job gorl

Question 9

Solve page 638

Answer 9

Good

Question 10

Contrast between the current and voltage that passes through resistors in series.

Answer 10

The total current is the same as the current that passes through each resistor, but the total voltage is the sum of each resistors’ voltages.

Question 11

What happens to a series circuit if one light bulb has a broken filament?

Answer 11

The circuit is no longer closed, meaning that the rest of the light bulbs will also stop working.

Which is a reason why parallel is preferred

Question 12

What is a pro to using circuits in series?

Answer 12

If one light bulb stops working, the rest can stop working, as opposed to if the rest didn’t, which would lead to a potential increase in voltage through the other bulbs that they don’t possess the resistance to handle, which might cause excessive heating up/a fire.

Or it prevents a short circuit

Question 13

Contrast between resistors in series and parallel

Answer 13

Resistors in series have the same currents flowing through them (depending on the resistance), and the total voltage is the sum of voltages.

Resistors in parallel have different current flowing through them (depending on the resistance), and the same voltage as the terminal voltage.

Question 14

When many resistors are connected in parallel…

Answer 14

the voltage in each stays the same

Question 15

How do you calculate the total current in parallel resistors?

Answer 15

By adding all the currents

Question 16

Go to page 640 and answer ur question

Answer 16

Noice

Question 17

How do you find Req in parallel circuits?

Answer 17

1/Req = 1/R1 + 1/R2 + 1/R3 …

Question 18

The equivalent resistance for a group of resistors in parallel must be…

Answer 18

smaller than the smallest resistance in the group of resistors

Question 19

Test yourself on figure 2.6 page 641

Answer 19

OK

Question 20

What happens when a bulb in parallel stops working?

Answer 20

The other bulbs continue to work, and the voltage supplied to each remains the same

Question 21

In parallel, the potential dfference across each resistor is…

Answer 21

the same as the potential difference acorss the source.

Question 22

Solve page 644