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Science 2017 > Physics Definitions > Flashcards

Physics Definitions Flashcards

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1
Q

Scalar

A

A physical quantity which has a magnitude only

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2
Q

Vector

A

A physical quantity which has both magnitude and direction

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3
Q

Resultant

A

The single vector which has the same effect as all the component vectors together would have

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4
Q

Maximum resultant

A

Obtained when 2 vectors act in the same direction

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5
Q

Minimum resultant

A

Obtained when 2 vectors act in the opposite direction

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6
Q

Distance

A

Length of path actually taken

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7
Q

Displacement

A

A body’s change in position

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8
Q

Speed

A

RATE OF CHANGE OF DISTANCE MOVED

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9
Q

Instantaneous speed

A

Speed at a particular moment

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10
Q

Velocity

A

The rate of change of position

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11
Q

Instantaneous velocity

A

The velocity at a particular moment

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12
Q

Acceleration

A

The rate of change of velocity

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13
Q

EMF

A

Voltage of a battery with no current flowing

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14
Q

Potential difference

A

Voltage of a battery with a current flowing

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15
Q

Current

A

The rate of flow of charge. The number of coulombs of charge that flow past a point in a circuit every second

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16
Q

Resistance

A

The property of a material which causes it to oppose the flow of charge through it

17
Q

Series circuit

A

When resistors are connected in such a way that there is only one path along which the current can flow.

18
Q

Parallel circuit

A

There is more than one path for the current to follow

19
Q

Battery

A

More than one cell connected together

20
Q

Resistor

A

A component that opposes the flow of current in an electrical circuit

21
Q

Rheostat

A

A component in an electrical circuit that has the ability to change its resistance

22
Q

Voltage

A

Measure of the amount of potential energy (or EMF) stored in an cell or used by a circuit component

23
Q

Voltmeter

A

An instrument used to measure voltage

24
Q

Ammeter

A

An instrument used to measure amperes

25
Q

Weight

A

The gravitational forge that a celestial body such as a moon or planet exerts on an object on its own surface (N)

26
Q

Gravitational potential energy

A

The potential energy dependant on gravitational force and the height

27
Q

Kinetic energy

A

Energy of motion, the greater the mass of an object and the faster an object moves, the greate its kinetic energy

28
Q

Mechanical energy

A

Sum of its kinetic energy and its gravitational potential energy

29
Q

Principle of conservation of energy

A

Principle that states energy can not be created or destroyed.

Science 2017 (19 decks)

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