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Physics Unit 6 + 7 > Circuts > Flashcards

Circuts Flashcards

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1
Q

_____ ___ - Formula used to calculate the relationship between voltage (V), current (I) and resistance (R) in an electrical circuit

A

Ohms law

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2
Q

_____ (aka potential difference) - Measured in volts (V). The potential difference that pushes electrons through a circuit. If there’s no voltage there is no current (Ex: outlet or battery)

A

Voltage

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3
Q

____ - Measured in amps (A). The rate at which charges flow through a complete circuit)

A

Current

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4
Q

_____ - Measured in ohms (omega symbol). the opposition to an electric currents flow (ex: a lightbulb)

A

Resistance

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5
Q

Voltage have a ___ relationship with current and resistance

A

Direct relationship

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6
Q

Current and resistance have an ___ relationship

A

Inverse relationship

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7
Q

____ measured in watts (W), depends on V, I, and R

A

Power

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8
Q

___ = charge (q) per time (t). 1 amp = 1 C/s

A

Current

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9
Q

—| I— (symbol for what?)

A

Voltage source (V)

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10
Q

——— (symbol for what?

A

Wire (A)

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11
Q

——(X)—- or —-(squiggle)—- (Symbol for what?)

A

Lightbulb (ohm symbol)

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12
Q

—-/\/\/— (Symbol for what?)

A

Resistor (ohm symbol)

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13
Q

—-⚫️/ ⚫️— (Symbol for what?)

A

Switch

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14
Q

—-(V)—- (Symbol for what?)

A

Voltmeter (V)

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15
Q

—(A)— (Symbol for what?)

A

Ammeter (A)

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16
Q

Wires have (high/low) resistance

A

Low resistance

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17
Q

Resistors (use/don’t use) the voltage that travels through the circuit

A

Use the voltage

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18
Q

Switches open (current can/cant flow) the circuit

A

Current Can’t flow

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19
Q

Switched close (current can/cant flow) the circuit

A

Can flow

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20
Q

+ (high/low potential)

A

High potential

21
Q

Electricity chooses the path of (most/least) resistance. Since wires have no resistance electricity will go through a wire instead of a device or circuit (this causes a short circuit)

A

Least resistance

22
Q

___-___ - When a wire by-passes a device in a circuit

A

Short-circuit

23
Q

Vemf (___ ___) = Voltage of your battery. (Each resistor in a series circuit will use some of this voltage, so the amount of voltage they use should add up to the total, your battery’s voltage)

A

Total Voltage

24
Q

RT (___ ____) - In a series circuit you add together the resistance of each resistor to find the total

A

total resistance

25
Q

IT (___ ____) - In a series circuit the same amount of current flows through each resistor. (Use ohms law to calculate total current from total voltage and total resistance)

A

Total current

26
Q

When voltage increases current ____

A

Increases

27
Q

When resistance increases the current ____

A

Decreases

28
Q

When voltage increases resistance _____

A

Increases

29
Q

In a SERIES CIRCUIT, the current is always ____ (constant/different)

A

Constant

30
Q

As we add more resistors in a SERIES, the current ___ (dec/inc). This is because adding more resistors in a SERIES means there is ____ (more/less) resistance to the flow of charge

A

Decreases
More

31
Q

The sum of the voltage of all the resistors is (less than/equal to/greater than) the voltage of the battery.

A

Equal to

32
Q

In a PARALLEL CIRCUIT the sum of the currents of all the resistors is ___ (less/equal/greater than) the current from the battery.

A

Equal to

33
Q

As we add more resistors in a PARALLEL CIRCUIT, the current in the circuit ____ (inc/dec/no change). This is because adding more resistors in a PARALLEL means there is (more/less) resistance to the flow of charge.

A

Increases
Less

34
Q

For resistors in PARALLEL, the voltage across each resistor is always ____ (the same/different)

A

The same

35
Q

Voltmeters go (parallel/through) the circuit because things in parallel with each other have the same voltage

A

Parallel

36
Q

Ammeters go (parallel/through) the circuit because things in series with each other have the same current

A

Through

37
Q

Fuses ____ (or break) when too much current passes through it

A

Melt

38
Q

Circuit breakers protects against too much current like fuses but they can be ____

A

Reset

39
Q

Conventional current flows from the _____ potential to the ____ potential

A

High to low (positive | to negative I side of battery)

40
Q

Electron current flows from ____ potential to ___ potential

A

Low to high (I to | on the battery)

41
Q

Solve complex circuits by starting with the _____ circuits

A

Parallel circuits

42
Q

Converting power to kW

A

Divide power by 1000

43
Q

Energy =

A

Power x time

44
Q

Cost =

A

Energy x rate

45
Q

In a SERIES circuit, what happens to the brightness of the bulbs as more bulbs are added to the circuit?

A

The bulbs dim as more are added

46
Q

In a SERIES circuit, what happens to the rest of the bulbs when one bulb goes out?

A

They all will go out if they share the same path/current

47
Q

In a PARALLEL circuit, what happens to the brightness of the bulbs as more bulbs are added to the circuit?

A

The brightness of the bulbs will stay the same

48
Q

In a PARALLEL circuit, what happens to the other bulbs when one bulb goes out?

A

If one goes out the others will stay the same because there are multiple pathways for the current to flow

49
Q

(Thin/thick) wires provide more resistance

A

Thin

Physics Unit 6 + 7 (2 decks)

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