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Module 4 Series and Parallel Circuits Flashcards

(20 cards)

1
Q

Name these symbols

A

Open switch and closed switch

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2
Q

Name this symbol

A

Cell

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3
Q

Name this symbol

A

Battery

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4
Q

Name this symbol

A

Diode

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5
Q

Name this symbol

A

Resistor (or Ohmic conductor)

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6
Q

Symbol for a variable resistor

A
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7
Q

Name this symbol

A

Thermistor

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8
Q

Name this symbol

A

LDR (light dependent resistor)

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9
Q

Symbol for LED (light emitting diode)

A
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10
Q

What is this?

A

symbol for a capacitor

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11
Q

How is current shared in a series circuit?

A

current is same at every point in the circuit (at a particular time)

this also applies to one branch of a parallel circuit

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12
Q

How is current shared in a parallel circuit?

A

current is shared between the branches depending on the resistance

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13
Q

How is voltage shared in a series circuit?

A

voltage of power source is shared between components used depending on their resistance (Kirchhoff’s 2nd law)

applies to voltage on one branch of a parallel circuit

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14
Q

How is voltage shared in a parallel circuit?

A

voltage is same across each branch of the circuit

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15
Q

How is the power of a component in a series circuit related to its resistance?

A

P=I^2R - I is the same at a given point in time so P∝R, higher the resistance the higher the power (in bulbs the brighter the bulb)

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16
Q

How is the power of a component in a parallel circuit related to its resistance?

A

P=V^2/R, V is the same across each branch so we can say that P is proportional to 1/R

17
Q

What is the total resistance of a series circuit?

A

the sum of individual resistances of all components

18
Q

Why does a voltmeter need to have very high resistance?

A

to minimise change in current over the component being measured. V=IR, V is same R greater so I must be smaller

19
Q

Why does an ammeter need to have a very low resistance?

A

so current and voltage remains unchanged. V is shared between all components in series according to resistance, V=IR, if R is small and I is same through all components at any point in time V will be small

20
Q

What is the total resistance of a series circuit?

A

Total R = (1/R1 + 1/r2 + ….)^-1