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Physics 251 > Final Exam > Flashcards

Final Exam Flashcards

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1
Q

Long straight wire RHR

A

thumb current wrap fingers in direction og mag field

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2
Q

Loop RHR

A

thumb in direction of mag field wrap fingers in current

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3
Q

force RHR

A

finger velocity, palm mag field, thumb force

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4
Q

things in parallel have the same

A

voltage for R and C

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5
Q

things in series have the same

A

current for R
charge for C

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6
Q

If flux is increasing…

A

induced field is opposite direction of mag field

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7
Q

if flux is decreasing….

A

induced field is same direction of mag field

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8
Q

magnets flow from..

A

North to south

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9
Q

if wires are going in opposite directions they…

A

repel each other

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10
Q

when crossing a resistor in loop problems

A

resistance is multiplied by current

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11
Q

crossing a battery from - to +

A

add volatage

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12
Q

crossing a battery from + to -

A

subtract voltage

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13
Q

crossing resistor in direction of current

A

subtract voltage

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14
Q

crossing resistor in opposite direction of current

A

add voltage

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15
Q

charging equation

A

E(1-e)

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16
Q

discharging equation

A

(Vc)e

17
Q

)(

A

concave, diverging lens

18
Q

()

A

convex, converging lens

19
Q

)

A

concave, converging mirror

20
Q

(

A

convex, diverging mirror

21
Q

strong refelction

A

constructive

22
Q

weak reflection

A

destructive

23
Q

s

A

always positive

24
Q

s’

A

positive when real, opposite lens/same side mirror

25
Q

f

A

positive when converging lens/mirror

26
Q

m

A

positive is upright, negative is inverted

27
Q

alpha decay

A

-2 p, -4 mass, +alpha + energy

28
Q

beta - decay

A

-1p, -0 mass, +e- +energy

29
Q

beta + decay

A

-1p, -0 mass, +e+ +energy

30
Q

tau

A

= t(1/2) / ln2

31
Q

t(1/2)

A

=tau(ln2)

32
Q

wavelength material =

A

= wavelength in vacuum/n

Physics 251 (4 decks)

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