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Uworld > Physics Circuits > Flashcards

Physics Circuits Flashcards

1
Q

Charge q on a capacitor formula

A

Q = CV

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2
Q

Capacitance formula

A

C = A/ Distance

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3
Q

Intensity formula

A

I = P / A = (Energy * time) / Area

More gamma rays -> more intensity
Greater dose increases gamma ray intensity

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4
Q

Electromagnetic radiation

A
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5
Q

Current formula with charge

A

I = Q / time

Q = I * time

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6
Q

Voltage formula

A

V = IR

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7
Q

What is electrical conductivity?

A

How easily a current can move through a material and it is inversely proportional to electrical resistance

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8
Q

W apparent formula

A

W apparent = W air - Fb

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9
Q

Formula for specific gravity

A

p substance / p water

when submerged in water specific gravity = Weight / Fb

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10
Q

When force is applied to an object in water, velocity ..

A

Increased but when the force is removed, velocity is constant

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11
Q

Capacitance it dielectric materials formula

A
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12
Q

In series circuit voltage … while current …

A

Different
Current is the same

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13
Q

In parallel circuit voltage is … while current is ..

A

Voltage is the same
Current is different

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14
Q

Ohms law

A
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15
Q

Resistance formula

A
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16
Q

R eq and Ceq in series

A

Req = R 1 + R2 + R 3

1/C eq = 1/C1 + 1/C2 +

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17
Q

Req and Ceq in parallel

A

C eq = C1 + C 2 + C 3

1/Req = 1/R1 + 1/ R2

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18
Q

Conductivity characteristics

A

Describes how east charges flow through the molecular structure of the given material.

Directly proportional to electric conductor
But inversely proportional to resistivity

Most metals are highly conductive while no metals are nonconductive.

Salt solution are high conductivity while weak acid solution is low and simple alcohol no conductivity at all.

When conductivity high, current also high and vice versa

19
Q

Energy in a capacitor formula

A

U = 1/2 CV^2 = 1/2 QV = 1/2 Q^2/ C

20
Q

SI units

A
21
Q

Electric power formula

A
22
Q

Electric charges can be

A

Positive and negative

23
Q

Current formula with time

A

I = Q/ t

Q - charge in C

24
Q

What is confounding variable?

A

Uncontrolled variable than affect the DV

25
Q

In parallel circuit when one resistor is gone the the Req

A

Increases

And when one more resistor is added, then Req decreases

26
Q

Lorentz force vs centripetal force

A

Lorentz force- force exerted in an ion in a magnetic field

27
Q

Electric field characteristics

A

A space that exerts a force on charged particles

E= V/ d

N/C = V/m

28
Q

Electrostatic force on a charge in an electric field

A

F = qE

29
Q

Charge Q on a an object is

A

Q = n e

e = - 1.6 * 10^-18

30
Q

What is electromotive force?

A

Energy that is supplied by a battery to move charge through a circuit

31
Q

Electric charge is conserved therefore

A

Charge cos not be created or destroyed
In a closed system total charge is constant

32
Q

Electrical insulators and conductors

A

Conductors - allow the flow of electric charges when they are exposed to a voltage

Insulators - do not contain mobile charge carriers and do not allow electric charges to flow when a voltage is applied

33
Q

Magnetic fields are generated by?

A

Electromagnetic radiation, permanent magnets and motion of charged particles

34
Q

Acceleration formula

A
35
Q

Power with work

A

P = W/t = E/t

36
Q

In order to achieve accurate voltage measurements, voltmeter should have

A

A very large resistance

37
Q

How to calculate q from Coulomb’s law?

A

q= (Er^2)/ k

38
Q

Heat energy q is directly proportional by a resistor to

A

Its electric power

39
Q

Relationship between Fe and Fg

A

F = Fe -Fg

When Fe > Fg => moves toward the hand
If opposite then away

40
Q

Decibel scale of the sound intensity

A

dB = 10 log I1/I2

41
Q

What is work done by Lorentz force in electron?

A

Zero

42
Q

kEv to Ev

A

1 kEV = 1000 Ev

43
Q

Intensity formula

A

P/A = (energy/time) / area

More gamma rays = more intensity

Uworld (24 decks)

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