## Circuit Lab B

StuffyNose45
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### Re: Circuit Lab B

1) Lenz's Law
2) Input resistance is infinite
3) R=p*L/A; Resistance= resistivity*length of wire/cross sectional area
4) Eddy Currents are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction

BasuSiddha23
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### Re: Circuit Lab B

StuffyNose45 wrote:
November 17th, 2019, 11:35 am
1) Lenz's Law
2) Input resistance is infinite
3) R=p*L/A; Resistance= resistivity*length of wire/cross sectional area
4) Eddy Currents are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction
Eagle View MS (2017-2019)

StuffyNose45
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### Re: Circuit Lab B

1. Which scientist coined the term solenoid?

2. How do you calculate the magnetic field of a solenoid given the magnetic constant, the current, length of the solenoid and the number of turns?

3. What are two ways to increase the magnetic field of a solenoid?

Crimesolver
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### Re: Circuit Lab B

StuffyNose45 wrote:
November 30th, 2019, 10:33 am
1. Which scientist coined the term solenoid?

2. How do you calculate the magnetic field of a solenoid given the magnetic constant, the current, length of the solenoid and the number of turns?

3. What are two ways to increase the magnetic field of a solenoid?
solenoid was coined by ampere
B = (magnetic constant*current*number of turns)/length
create more turns, add more current
Keep on going :)

StuffyNose45
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### Re: Circuit Lab B

Crimesolver
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### Re: Circuit Lab B

What is the difference between an avalanche diode and a zener diode?
Keep on going :)

azboy1910
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### Re: Circuit Lab B

I know if this is really a difference or not, but,

An avalanche diode is designed to experience avalanche breakdown at a specified reversed bias voltage. Zener diodes are are designed to breakdown at a precisely set voltage.
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Crimesolver
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### Re: Circuit Lab B

yep you are right
Keep on going :)

azboy1910
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### Re: Circuit Lab B

Ok,

1) How does the polarity of an LED affect it?

2) In one hour, what is the work done by this circuit?

3) Which wire has a greater resistance:
- Wire 1: Length of 2L, Cross-Sectional Area of 2A
- Wire 2: Length of 4L, Cross-Sectional Area of 3A
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Creationist127
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### Re: Circuit Lab B

azboy1910 wrote:
March 4th, 2020, 1:15 pm
Ok,

1) How does the polarity of an LED affect it?

2) In one hour, what is the work done by this circuit?

3) Which wire has a greater resistance:
- Wire 1: Length of 2L, Cross-Sectional Area of 2A
- Wire 2: Length of 4L, Cross-Sectional Area of 3A
```1) An LED only allows current in one direction, so if it is in backwards (polarity reversed), it won't light up.
2) Total resistance = 15 Ω; P = IV = V²/R; P = 60²/15 = 240 W; P = W/t; 240 = W/3600; W = 864000 J = 860 kJ
3) R=ρL/A; R1 = ρ*2L/2A; R2 = ρ*4L/3A; R2 = R1*4/3, so R2 has the greater resistance```
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