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ChELE > Physics > Flashcards

Physics Flashcards

1
Q

It is defined by taking the fixed numerical value of the speed of light in vacuum.

a. Kilogram
b. Second
c. Meter
d. Kelvin

A

c.

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2
Q

SI unit of luminous intensity in a given direction.

a. Ampere
b. Second
c. Candela
d. NOTA

A

c

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3
Q

A cylinder with platinum-iridium alloy is used to define the kilogram. What is the name of this cylinder?

a. Le Grand K
b. pti alloy
c. standard kilogram
d. standard mass

A

a

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4
Q

What is the cgs unit of force?

a. Newton
b. erg
c. dyne
d. poise

A

c

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5
Q

The “triple point” of a substance is that point for which the temperature and pressure are such that:

a. only solid and liquid are in equilibrium
b. only solid and vapor are in equilibrium
c. only liquid and vapor are in equilibrium
d. solid, liquid, and vapor are all in equilibrium

A

d

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6
Q

Thermal energy whose transfer to or from a substance results in a change of temperature

A

Sensible Heat

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7
Q

The heat required to convert a solid into a liquid or vapor, or a liquid into a vapor, without change of temperature.

A

Latent Heat

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8
Q

A law stating that the ratio of the sines of the angles of incidence and refraction of a wave are constant when it passes between two given media.

A

Snell’s Law

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9
Q

The light ray can actually bend so much that it never goes beyond the boundary between the two media. This case of refraction is called __________.

A

Total Internal Reflection

critical angle = arcsin( n2/n1 )

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10
Q

The scientific study of sight and the behavior of light, or the properties of transmission and deflection of other forms of radiation.

A

Optics

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11
Q

The laws of physics are the same for all observers in any inertial frame of reference relative to one another (principle of relativity).

General Relativity / Special Relativity

A

Special Relativity

• Special relativity is an explanation of how speed affects mass, time and space

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12
Q

Two events, simultaneous for one observer, may not be simultaneous for another observer if the observers are in relative motion.

a. Relativity of simultaenity
b. Time dilation
c. Length contraction
d. NOTA

A

a

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13
Q

Moving clocks are measured to tick more slowly than an observer’s “stationary” clock.

a. Relativity of simultaenity
b. Time dilation
c. Length contraction
d. NOTA

A

b

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14
Q

Objects are measured to be shortened in the direction that they are moving with respect to the observer.

a. Relativity of simultaenity
b. Time dilation
c. Length contraction
d. NOTA

A

c

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15
Q

Clocks run slower in deeper gravitational wells

a. Precession
b. Gravitational Time Dilation
c. Light deflection
d. Frame dragging

A

b

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16
Q

Rays of light bend in the presence of a gravitational field

a. Precession
b. Gravitational Time Dilation
c. Light deflection
d. Frame dragging

A

c

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17
Q

Rotating masses “drag along” the spacetime around them.

a. Precession
b. Gravitational Time Dilation
c. Light deflection
d. Frame dragging

A

d

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18
Q

It deals with the study of light and particles at atomic and smaller level

a. Strength of Materials
b. Physics
c. Quantum Mechanics
d. NOTA

A

c

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19
Q

States that the current through a conductor between two points is directly proportional to the voltage across the two points

A

Ohm’s law

20
Q

Nuclear sizes are expressed in a unit named

a. Fermi
b. Angstrom
c. Newton
d. Tesla

A

a

• Angstrom - wavelength s of visible light, ultraviolet (UV) light, X rays, and gamma rays.

• Tesla - magnetic flux density

21
Q

Lightyear is a unit of

a. time
b. distance
c. light
d. intensity of light

A

b

22
Q

Mirage is due to

a. unequal heating of different parts of atmosphere
b. magnetic disturbances in the atmosphere
c. depletion of ozone layer in the atmosphere
d. equal heating of different parts of the atmosphere

A

a

23
Q

Stars appears to move from east to west because

a. all stars move from east to west
b. the earth rotates from west to east
c. the earth rotates from east to west
d. the background of the stars moves from west to east

A

b

24
Q

If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then both bodies acquire the same

a. velocity
b. momentum
c. acceleration
d. kinetic energy

A

b

25
Q

Out of the following, which is not emitted by radioactive substances?

a. electrons
b. electromagnetic radiations
c. alpha particles
d. neutrons

A

d

26
Q

Sound waves in air are

a. transverse
b. Longitudinal
c. electromagnetic
d. polarized

A

b

27
Q

Light waves in air are

a. transverse
b. Longitudinal
c. electromagnetic
d. polarized

A

a

28
Q

Materials for a rain-proof coats and tents owe their water-proof properties to

a. surface tension
b. viscosity
c. specific gravity
d. elasticity

A

a

29
Q

Intensity of sound at a point is ________ its distance from the source

a. directly proportional to
b. inversely proportional to
c. directly proportional to square of
d. inversely proportional to square of

A

d

30
Q

Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open.

a. at sea level
b. at the top of Mt. Everest
c. at a place below sea level
d. in an aeroplane flying at a height of 10km with inside pressure maintained at the sea level

A

c

31
Q

Mercury is commonly used as a thermodynamic fluid rather than water
because

a. specific heat of mercury is less than water
b. specific heat of mercury is more than water
c. mercury has greater visibility than water
d. density of mercury is more than the water

A

c

32
Q

Developed Inertial Reference frame

a. Isaac Newton
b. Einstein
c. Galileo
d. NOTA

A

c????

33
Q

At faster speeds, objects and distances appear to be

shorter
longer

A

shorter

34
Q

an object remains in its state of rest, or in motion, with constant velocity, unless acted upon by a net external force

a. first law of motion
b. second law of motion
c. third law of motion

A

a

35
Q

States that the acceleration of an object is dependent upon the net force acting upon the object and the mass of the object

a. first law of motion
b. second law of motion
c. third law of motion

A

b

36
Q

property of a body, by virtue, of which a resultant force is required to change its motion

a. net force
b. Inertia
c. accelaration

A

b

37
Q

it is a force between two bodies. Proportional to the normal force, and is directed parallel to the surface

a. coefficient of kinetic force
b. friction
c. momentum

A

b

38
Q

it is the ability of a system to do work

a. work
b. energy
c. force
d. power

A

b

39
Q

it is the rate of doing work

a. work
b. energy
c. force
d. power

A

d

40
Q

affects an object in the same way, regardless of its path of travel

a. conservative force
b. non conservative force

A

a

ex: gravity

41
Q

type of collision, where kinetic energy is conserved

a. Elastic
b. Inelastic
c. Restitution

A

a

42
Q

States that a body immersed in a fluid is subjected to an upward force, bouyant force, which is equal to the weight of the liquid

a. Pascals Law
b. Newtons Law of Motion
c. Archimedes principle
d. NOTA

A

c

43
Q

A system that always experiences, restoring force acting against the displacement of the system

a. Pulley system
b. Truss
c. Oscillating system
d. All of the above

A

c

the restoring force is a force that acts to bring a body to its equilibrium position

44
Q

The maximum displacement of an oscillating system from its equilibrium position

a. Period
b. Frequency
c. Amplitude
d. Angular frequency

A

c

45
Q

it is the time it takes for a system to complete a cycle

a. Period
b. Frequency
c. Amplitude
d. Angular frequency

A

a

46
Q

angle of ________ equals the angle of incidence

refraction / reflection

A

reflection

ChELE (21 decks)

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