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Physics lesson work > Book work > Flashcards

Book work Flashcards

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AP® Physics flashcards Physics 101 flashcards
1
Q

What is the equation for energy?

A

E=P x T

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2
Q

What is the equation for power?

A

P=I x V

P=I2 x R

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3
Q

What is the equation that links Potential difference, Current and resistance?

A

V=IR

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4
Q

What is the unit for energy?

What is the unit for power?

A

Joules(J)

Watts(W)

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5
Q

What is the equation that links Charge flow, Current and Time?

A

Charge flow = current x time

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6
Q

What is the equation that links Energy, Potential difference, Current and Time?

A

Energy = P.D x current x time

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7
Q

What are the units for Current?

What are the units for Resistance?

A

Amps(A)

Ohms

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8
Q

What piece of equipment measures:
Voltage?
Current?

A

Voltmeter

Ammeter

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9
Q

What is LED short for?

A

Light emitting diode

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10
Q

What is LDR short for?

A

Light dependant resistor

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11
Q

A series circuit has a battery with a P.D of 12V, connected to a light bulb with a resistance of 4 Ohms. What is the size of the electric current in this circuit?

A

3 Ohms

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12
Q

A parallel circuit has a 20V power supply connected to two 8 Ohm resistors in parallel. Calculate the size of the current flowing through the battery.

A

5 A

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13
Q

What is the combined resistance of two 25 Ohm resistors connected in parallel?

A

Less than 25 Ohms

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14
Q

If the current through a component increases, what happens to the P.D across it?

A

The P.D increases

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15
Q

To obtain the I-V curve of a component a variable resistor is connected in series with the component. Changing the resistance changes the current in the circuit. The ammeter should be connected.

A

In series with the component

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16
Q

What happens to the resistance of an LDR as the light intensity increases?

A

It decreases

17
Q

Kinetic energy equation

A

E = v^2 x 0.5 x k

18
Q

A series circuit has a 9V battery connected to a 2 Ohm light bulb. Calculate the current flowing through the bulb and it’s power.

A

4.5A, 18W

19
Q

Potential energy

A

The energy associated with the bonding state of the particles

20
Q

Internal energy

A

The total kinetic and potential energy of the particles in a system

21
Q

Temperature

A

The average kinetic energy of all the particles in a substance

22
Q

Specific heat capacity

A

The amount of energy required to raise the temperature of 1kg of liquid at its melting point

23
Q

Specific latent heat of fusion

A

The amount of energy needed to change 1kg of solid to 1kg of liquid at its melting point

Physics lesson work (1 decks)

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