electricity Flashcards

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1
Q

current, resistance, pd

A

V=IR

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2
Q

current, time, charge

A

Q=It

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3
Q

pd, power, current

A

P=IV

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4
Q

resistance, power, current

A

P=I^2 R

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5
Q

time, energy, power

A

P=E/t

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6
Q

Mega, kilo, milli, micro (power of 10)

A

10^6, 10^3, 10^-3, 10^-6

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7
Q

RP1(R in Series)=
Ammeter=______
CV=_______&_______
Relationship______

A

Ammeter= in series
CV= resistors have same value & temp of resistors remain the same
Relationship= Current is inversely proportional to number of resistors

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8
Q

RP2(R in Parallel)
Relationship=______
Reason=______

A

Relationship= adding resistors in parallel will increase current flowing
Reason= more paths for current to flow, decreasing overall circuit resistance

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9
Q

RP3(length of wire affecting R)
Ammeter=_____
Voltmeter=______
Relationship=_______
CV=______

A

Ammeter=in series
Voltmeter= in parallel
Relationship=resistance of wire is directly proportional to its length
CV= temp of wire remains the same

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10
Q

RP4(current vs volts)
Ammeter=____
Voltmeter=______
Variable resistor=_____

A

Ammeter=series
Voltmeter=parallel
Variable resistor=series

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11
Q

diagrams for:
Resistor
Filament bulb
Diode

A

R= ↗️
Filament bulb=⤴️↗️
Diode=⤴️

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12
Q

UK mains supply
Pd=
A.c=
Frequency=

A

Pd= 230 volts a.c
A.c= alternating current
Frequency= 50 Hz

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13
Q

Wiring a plug
Live=______
Neutral=______
Earth=_______

A

Live= Brown (bottom right, 230V)
Neutral=Blue (bottom left, 0V)
Earth= Yellow/green (safety wire, 0V)

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14
Q

FUSE=
A ____ piece of wire that will ____ if too large a current flows through the ____ wire. (1A, 3A, 5A, 13A)

Fuses prevent F_R_S

A

thin, melt, live

Fires

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15
Q

EARTHING=
Prevents E___T_O__TI_N if a fault occurs & the ____ wire touches the ____ casing of an appliance.
Possible electric shock/death

A

Electrocution, live, metal

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16
Q

NCOG=
Advantages=
Disadvantage=
Nuclear F__S_ON (induced by a neutron) produces ____ = water➡️steam, turns t__b_ne and g_n_ra__r

A

Nuclear (uranium & plutonium), coal, oil, gas
ADV= reliable (Nuclear- ❌CO2, large amounts from small amount of fuel)
DISADV= (COG- CO2 produced = global warming, fossil fuels will run out)
DISADV= (N- radioactive waste☢️, u+p will run out)
Fission, heat, turbine, generator

17
Q

WWW.GHST
Adv=
Disadv=

A

wind, wave, wood, geothermal, hydro, solar, tidal
Adv= renewable, ❌CO2 emitted, 🪵=carbon neutral
Disadv= unreliable, depending on different variables, solar=💰💸

18
Q

National grid
1) P___r St___on
2) Step __ transformer (⬆️pd)
3) Po__r C___es
4) Step ____ transformer (⬆️current)
5) H_m_s (230V a.c)

⬆️pd= less energy to surrounds as ____ = more energy received at h_m_s = transmission is more e__ic_en_

A

Power station, Up, power cables, down, homes
Heat, homes, efficient