Current, Voltage, Resistance. Flashcards

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1
Q

Fill in the gaps:
Current is the ____ of electrons, the bigger the ____ the more electrons that flow. the current is measured in _____ using an _____ connected in series.

A

answers in order: flow, current, amperes, ammeter

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2
Q

_____ is a measure how big a ____ _____ are given as they leave the _____ or ____. the bigger voltage the bigger push. Electrons only ____ because of this push (____). It is measured in ____ using a ______ connected in ______.

A
voltage               volts
push                   voltmeter
battery
cell               
electrons
flow
(voltage)
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3
Q

What is a series circuit?

A

A series circuit is when there is one route for currents to take

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4
Q

where are ammeters always placed? parallel or series

A

series

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5
Q

the current is always the same wherever you measure it? TRUE OR FALSE

A

TRUE

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6
Q

Is the sum of the voltages for each component equal to the one across the battery or cell?

A

yes, e.g component 2= 0.75v +
component 3= 0.75v
component 1= 1.5v

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7
Q

Is the current that leaves the cell or battery the (same/different) as it returns to the battery or cell?

A

It is the SAME.

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8
Q

The current (does/does not) get used up by a circuit?

A

It does get used up by a circuit.

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9
Q

The____ of the currents in the branches in the ____to the current that leaves the cell or battery?

A

1) sum

2) equal

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10
Q

Explain what this means in a parallel circuit?

A1= A2+A3=A4

A

In a parallel circuit A2+A3 are equal to A1 on one side of the circuit which is also equal to A4 on the other side of the parallel circuit. E.g: A1=0.8, A2=0.4, A3=0.4, A4=0.8

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11
Q

The voltage across each branch is the same as the one across the cell/battery? TRUE OR FALSE Give an example?

A

TRUE, because in a parallel circuit the voltmeters are parallel to each other E.g: V1=V2=V3.

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12
Q

When there is more than one route for the currents to take it is called a…?

A

Parallel circuit.

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13
Q

Resistance is a measure of how___/____ it is for current to____.

A

1) easy/hard

2) flow

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14
Q

Resistance can be calculated by diving voltage and current? TRUE OR FALSE

A

TRUE

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15
Q

what is the unit of resistance?

A

Ohms

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16
Q

What things can affect resistance?

A

Distance
Thickness
Materials
Tempertaure

17
Q

What is the formular triangle for resistance?

A

V
—————- (I represents current)
R * I