PM2017 wrote:Sorry to interject, but do you guys think that real tests will be as trivia/fact based as this QM seems to be going in the trend of?
I would have thought it would be much more calculation based.
Well i mean, its always good to know those random facts because they might appear on a test. and sometimes you rlly cant study for these random facts.
They're not really random so far though
Things2do wrote:What is a magnetic quadrupole?
A configuration of magnets with four poles (which is useful because the magnetic field decreases faster than that of a dipole)
Sounds good.
UTF-8 U+6211 U+662F wrote:
PM2017 wrote:Sorry to interject, but do you guys think that real tests will be as trivia/fact based as this QM seems to be going in the trend of?
I would have thought it would be much more calculation based.
So far, this has just been going over concepts. I'd expect lots of basic calculations in the beginning of actual tests (mostly because making up numbers is effort).
Not only is it effort, but you've also gotta run 'em yourself; both for the answer, and to make sure they're realistic enough for to be mathematically plausible.
Re: Circuit Lab B/C
Posted: October 11th, 2018, 3:12 pm
by UTF-8 U+6211 U+662F
Explain the purpose of fuses and how they are used.
Re: Circuit Lab B/C
Posted: October 11th, 2018, 3:19 pm
by MattChina
UTF-8 U+6211 U+662F wrote:Explain the purpose of fuses and how they are used.
Fuses are basically an electrical component used to prevent overcurrent in a circuit. It is usually a metal strip that melts when the current becomes too large therefore breaking the circuit. They are used in electrical appliances, and on the power grid and in our houses.
Re: Circuit Lab B/C
Posted: October 11th, 2018, 4:23 pm
by UTF-8 U+6211 U+662F
MattChina wrote:
UTF-8 U+6211 U+662F wrote:Explain the purpose of fuses and how they are used.
Fuses are basically an electrical component used to prevent overcurrent in a circuit. It is usually a metal strip that melts when the current becomes too large therefore breaking the circuit. They are used in electrical appliances, and on the power grid and in our houses.
Re: Circuit Lab B/C
Posted: October 11th, 2018, 4:39 pm
by MattChina
What is the difference of total resistance of a circuit with 3 resistors of 6 ohms each arranged in a series vs parallel?
Re: Circuit Lab B/C
Posted: October 11th, 2018, 4:40 pm
by UTF-8 U+6211 U+662F
MattChina wrote:What is the difference of total resistance of a circuit with 3 resistors of 6 ohms each arranged in a series vs parallel?
Series: 18 ohms, Parallel: 2 ohms
Re: Circuit Lab B/C
Posted: October 11th, 2018, 4:44 pm
by MattChina
UTF-8 U+6211 U+662F wrote:
MattChina wrote:What is the difference of total resistance of a circuit with 3 resistors of 6 ohms each arranged in a series vs parallel?
Series: 18 ohms, Parallel: 2 ohms
yep
Re: Circuit Lab B/C
Posted: October 11th, 2018, 5:02 pm
by Jacobi
MattChina wrote:What is the difference of total resistance of a circuit with 3 resistors of 6 ohms each arranged in a series vs parallel?
Well, it depends.
The resistance in series is 18 ohms (sum). The resistance in parallel is 2 ohms ([math]\frac{1}{\Sigma\frac{1}{R}}[/math]). The difference is 16 ohms.
When resistors are placed in series, the electrons have to go through multiple blockages to complete the circuit. Thus, the total resistance is greater. When resistors are placed in parallel, the electrons have multiple pathways, and thus they encounter less overall resistance.
Take your pick.
Re: Circuit Lab B/C
Posted: October 11th, 2018, 5:03 pm
by MattChina
Jacobi wrote:
MattChina wrote:What is the difference of total resistance of a circuit with 3 resistors of 6 ohms each arranged in a series vs parallel?
Well, it depends.
The resistance in series is 18 ohms (sum). The resistance in parallel is 2 ohms ([math]\frac{1}{\Sigma\frac{1}{R}}[/math]). The difference is 16 ohms.
When resistors are placed in series, the electrons have to go through multiple blockages to complete the circuit. Thus, the total resistance is greater. When resistors are placed in parallel, the electrons have multiple pathways, and thus they encounter less overall resistance.
Take your pick.
Questions was already answered
Re: Circuit Lab B/C
Posted: October 11th, 2018, 5:05 pm
by Jacobi
MattChina wrote:
Jacobi wrote:
MattChina wrote:What is the difference of total resistance of a circuit with 3 resistors of 6 ohms each arranged in a series vs parallel?
Well, it depends.
The resistance in series is 18 ohms (sum). The resistance in parallel is 2 ohms ([math]\frac{1}{\Sigma\frac{1}{R}}[/math]). The difference is 16 ohms.
When resistors are placed in series, the electrons have to go through multiple blockages to complete the circuit. Thus, the total resistance is greater. When resistors are placed in parallel, the electrons have multiple pathways, and thus they encounter less overall resistance.