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FEU Test Reviewer > PHYSICS2 > Flashcards

PHYSICS2 Flashcards

1
Q

All gases are fluids (T/F)

A

TRUE

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2
Q

Density is defined as mass per unit area (T/F)

A

FALSE, mass per unit volume*

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3
Q

An object that is completely or partially submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced (T/F)

A

TRUE

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4
Q

The zeroth law of thermodynamics states that if C is initially in thermal equilibrium with both A and B, then A and B are also in thermal equilibrium with each other. (T/F)

A

TRUE

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5
Q

It is a branch of science which deals with the study of the behavior of fluids.

A

Fluid Mechanics

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6
Q

It is a branch of Physics that deals with the study of temperature, heat energy, and their relation to matter.

A

Thermal Physics

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7
Q

This principle states that “an object that is completely or partially submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced.

A

Archimedes Principle

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8
Q

It is the transfer of energy at the speed of light through electromagnetic waves.

A

Conduction

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9
Q

This principle states that an external pressure applied to an enclosed fluid is transmitted uniformly throughout the volume of the liquid.

A

Pascal’s Principle

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10
Q

All liquids are fluids (T/F)

A

TRUE

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11
Q

Pressure is the amount of force exerted on a given area. (T/F)

A

TRUE

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12
Q

The strength of an electric field is the electric force exerted per unit positive electric charge. (T/F)

A

TRUE

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13
Q

Solids never expand when heated. (T/F)

A

FALSE, they do expand but slightly

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14
Q

When an object floats, partially submerged, the buoyant force exactly balances the weight of the object. (T/F)

A

TRUE

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15
Q

An object that is completely or partially submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced. (T/F)

A

TRUE

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16
Q

The electric charge of a proton is -1.602x10^-16C (T/F)

A

TRUE

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17
Q

Electric field is defined as the area where air resistance can be experienced. (T/F)

A

FALSE, where electrical force can be experienced*

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18
Q

Heat is the energy which travels from low temperature to high temperature in a matter. (T/F)

A

FALSE, travels from high to low*

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19
Q

The force of 2 charges of the same sign is repulsive (T/F)

A

TRUE

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20
Q

It is the unit used for the magnitude of the electric field.

A

N/C

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21
Q

The electric field _______ a positive charge.

A

points away from

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22
Q

Choose a correct description of a relationship of the strength of electric field E, the electric force F, and the positive electric charge q.

a. Assume q has one value. If the electric force is higher, the strength of electric field is lower.

b. Assume q has one value. If the electric force is lower, the strength of electric field is lower.

c. Assume F has one value. If the positive electric charge is lower, the strength of electric field is lower.

d. Assume F has one value. If the positive electric charge is higher, the strength of electric field is higher.

A

b

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23
Q

All are properties of charge except ___________

a. Quantization of Charge
b. Charge is always associated w/ mass
c. Neglect of Charge
d. Invariance of Charge

A

c

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24
Q

Electric field is defined as the area where electrical force can be experienced. (T/F)

A

TRUE

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25
Q

Friction is one of the types of charging process. (T/F)

A

TRUE

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26
Q

When a material has an excess number of electrons, it has a negative electrical charge. (T/F)

A

TRUE

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27
Q

The electric charge of a proton is -1.602x10-19 C. (T/F)

A

FALSE, ELECTRON* PROTON IS +

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28
Q

The strength of an electric field is the electric force exerted per unit positive electric charge. (T/F)

A

TRUE

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29
Q

The word “electric” is derived from the Greek word “electron”, meaning ____________.

A

Amber

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30
Q

It is the unit used for electric charge.

A

C (Coulumb)

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31
Q

The electric field ___________ a negative charge.

A

points toward

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32
Q

When there are more than two charges, this principle is used in finding the net electric force on a charge.

A

Superimposition principle

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33
Q

Choose a correct description of a relationship of the strength of electric field E, the electric force F, and the positive electric charge q.

a. Assume F has one value. If the positive electric charge is lower, the strength of electric field is lower.

b. Assume q has one value. If the electric force is higher, the strength of electric field is lower.

c. Assume F has one value. If the positive electric charge is higher, the strength of electric field is lower.

d. Assume q has one value. If the electric force is lower, the strength of electric field is higher.

A

c. Assume F has one value. If the positive electric charge is higher, the strength of electric field is lower.

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34
Q

When work done by the field is positive, potential energy decreases. (T/F)

A

TRUE

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35
Q

Capacitor stores heat energy. (T/F)

A

FALSE, STORES POTENTIAL ENERGY*

36
Q

The flow of charge in a wire is called current. (T/F)

A

TRUE

37
Q

Resistivity of a wire depends on its material. (T/F)

A

TRUE

38
Q

In applying Kirchhoff’s loop rule, the sign convention for IR is negative when the travel of the loop is the same with its current direction. (T/F)

A

TRUE

39
Q

Capacitance is directly proportional to:

A

The area of the plates

40
Q

One microfarad is equal to_____.

A

10 -6 F

41
Q

The effective capacitance of a capacitor is reduced when capacitors are connected in

A

series

42
Q

Which one of the following combinations of units is equivalent to the Ampere?

A

C/s

43
Q

Which one of the following statements concerning resistance is true?

a. The resistance of a metal wire changes with temperature.

b. Resistance is a property of resistors, but not conductors.

c. The resistance is the same for all samples of the same material.

d. The resistance of a wire is inversely proportional to the length of the wire.

A

a. The resistance of a metal wire changes with temperature.

44
Q

Find another formula for electrical power.

a. I^2R
b. IR^2
c. IR
d. I/R

A

a. I^2R

45
Q

Complete the statement so that it is always true. “An equipotential surface must be __________ to the electric field at any point.”

A

perpendicular

46
Q
  • short quiz 4 -
    A compass needle points geographic north because it is attracted to the magnetic south pole. (T/F)
A

TRUE

47
Q

Fiber optics make use of total internal reflection. (T/F)

A

TRUE

48
Q

Faraday’s Law states that the induced current is proportional to the change of magnetic flux. (T/F)

A

TRUE (?)

49
Q

Two parallel wires carrying opposite-direction currents will be attracted to each other. (T/F)

A

FALSE, REPULSIVE**

50
Q

A changing magnetic field can produce an electric current. (T/F)

A

TRUE

51
Q

What is the unit for magnetic field?

A

Tesla (T)

52
Q

An electric current flows into the page. What is the direction of the magnetic field?

A

Clockwise

53
Q

Two parallel wires carrying currents in the same direction will ______________.

A

Be attracted to each other

54
Q

When brought close to each other, two unlike poles of a magnet will ______________.

A

be attracted to each other

55
Q

The angle between the current and the magnetic field when magnetic force is at the maximum.

A

90 degrees

56
Q

A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will ______________

A

decrease

57
Q

How long does light in a vacuum travel in one meter?

A

1 / 3x10^8m/s ??

58
Q

The bending of light as it moves from one medium to another with differing indices of refraction is due to a change in what property of the light?

A

speed

59
Q

Which one of the following is an application of Faraday’s Law?
all of the choices
induction cookers
microphones
generators

A

all of the choices

60
Q

Which one of the following statements concerning the magnetic field inside (far from the surface) a long, current-carrying solenoid is true?

The magnetic field is non-zero and nearly uniform.
The magnetic field is independent of the current in the solenoid.
The magnetic field is independent of the number of windings.
The magnetic field is zero

A

The magnetic field is non-zero and nearly uniform.

61
Q

What happens if you cut a bar magnet in half?

A

You get two smaller magnets, each with a North and South pole

62
Q

Which one of the following is not a characteristic of a magnetic force on a moving charge?

The magnetic force is proportional to the magnitude or “strength” of the magnetic field

The magnetic force is proportional to the magnitude of the charge and to the speed v of the particle

The magnetic force is proportional to cosθ

The magnetic force is perpendicular to the magnetic field and the velocity

A

The magnetic force is proportional to cosθ

63
Q

Two parallel wires carry current in opposite directions. What is the direction of the magnetic force on the current going into the page due to the current going out of the page?

A

Right

64
Q

The induced voltage across a stationary conductor in a stationary magnetic field ______________.

A

equals 0 V

65
Q

For a given wirewound core, an increase in current through the coil ______________.

  • END -
A

increases the flux density

66
Q

Which of the following does not affect the pressure beneath the surface of a liquid?

density of the liquid
strength of the gravitational field
depth of the liquid
area of the liquid surface

A

area of the liquid surface

67
Q

As a balloon rises in the air its volume increases, at the end it acquires a stable height and cannot rise any further. (T/F)

A

TRUE

68
Q

How can relatively denser object be made to float on the less dense fluid?

A

By altering the shape.

69
Q

Temperature is a microscopic concept. (T/F)

A

FALSE, MACROSCOPIC CONCEPT*

70
Q

Which one of the following properties could not be used as a temperature sensitive property in the construction of a thermometer?

the change in mass of a solid
the change in electrical resistance of a wire
the change in volume of a liquid
the change in pressure of a gas at constant volume
the change in length of a metal rod

A

the change in mass of a solid

71
Q

Which one of the following phrases is an example of sublimation?

the fumes produced by moth balls
the formation of raindrops in the atmosphere
the mist produced by liquid nitrogen
the formation of dew on blades of grass

A

the fumes produced by moth balls

72
Q

The units of heat are equivalent to those of which one of the following quantities?

A

work

73
Q

If solid objects A, B, C, and D of different densities are arranged from least dense to most dense and assuming their densities are higher than that of pure water, which of them would submerge the fastest if they were all released at the same time onto a beaker containing pure water?

A

D

74
Q

Archimedes Principle is most useful in determining the volume of ____.

A

Irregularly shaped 3D objects

75
Q

Objects A, B, and C are solid metals arranged from increasing coefficient of linear expansion. If the three metals of uniform shape are subjected to the same amount of heat, which of them would show the least change in length?

A

Object A

76
Q

At solid to liquid phase change in an isolated system, there is no change in temperature, only the __.

A

Latent heat of fusion

77
Q

CUSTOM:

The energy that charged particles such as electrons and protons have because of its own electric charge and its relative position to other charged particles.

A

Electric Potential Energy

78
Q

Work is a _______ quantity

A

scalar

79
Q

Ability to do work by virtue of position or
condition.

A

Potential Energy

80
Q

Ability to do work by virtue of motion. (Mass
with velocity)

A

Kinetic Energy:

81
Q

The work done by a resultant
force is equal to the change in kinetic energy that it produces.

A

Work-Energy Theorem

82
Q

A non-conducting material between the conducting plates of a capacitor

A

Dielectric

83
Q

The process of using magnetic fields to produce voltage, and in a complete circuit, a current.

A

Electromagnetic Induction

84
Q

Who first discovered electromagnetic induction?

A

Michael Faraday

85
Q

The sum of all the products of the length of each segment and the component of magnetic field parallel to the segment is equal to the u0 times the current that passes through the surface enclosed by the path.

A

Ampere’s Law

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