Deck 26: Energy and Temperature

Question 1

When two waves meet, their displacements

A)add up
B)cancel out
C)destruct each other
D)subtract down

Answer 1

add up

Question 2

Splitting of white light in to constituent colors is called

A)diffraction
B)refraction
C)reflection
D)dispersion

Answer 2

dispersion

Question 3

Grating element is equal to

A)nλ/sinθ
B)nλ
C)sinθ
D)cosθ

Answer 3

nλ/sinθ

Question 4

With diffraction grating, the angles are

A)small
B)greater
C)zero
D)close to zero

Question 5

Extra distance travelled by one of waves compared with other is called

A)path
B)displacement
C)phase difference
D)path difference

Question 6

Spreading of wave as it passes through a gap or around an edge is called

A)reflection
B)refraction
C)diffraction
D)superposition

Question 7

Fringes are referred to as

A)minima
B)maxima
C)nodes
D)normal points

Question 8

Principle of superposition can be applied to

A)EM waves
B)sound waves
C)radio waves
D)all of above

Question 9

Coherent sources emit waves that have

A)increasing phase difference
B)decreasing phase difference
C)constant phase difference
D)varying phase difference

Question 10

Interference pattern of light and dark bands on screen is called

A)graphical pattern
B)line spectrum
C)light spectrum
D)fringes

Question 11

Microwaves have wavelength of about

A)10 cm
B)20 cm
C)30 cm
D)40 cm

Question 12

In young double slit experiment, the wavelength of incident beams should be

A)same
B)different
C)zero
D)opposite

Question 13

Wavelength of an incident light when it is incident normally on a diffraction grating having 3000 lines per centimeter angular separation is 10° is

A)500 nm
B)650 nm
C)580 nm
D)600 nm

Question 14

Supply of energy depends upon

A)mass of material
B)the change in temperature
C)the material itself
D)all of above

Question 15

All substances have minimum internal energy at

A)absolute zero
B)0°C
C)0°F
D)100K

Question 16

On compression, the gat gets hotter due to

A)increase in kinetic energy
B)decrease in kinetic energy
C)increase in potential energy
D)increase in atomic collisions

Question 17

If there is no transfer of energy between two objects then their temperature is

A)same
B)different
C)zero
D)infinite

Question 18

Average kinetic energy of gas molecules is proportional to

A)internal energy
B)thermodynamic temperature
C)enthalpy
D)condensation point

Question 19

Celsius scale is based on properties of

A)Mercury
B)Aluminum
C)Cesium
D)Water

Question 20

Energy required per unit mass of substance to raise temperature of that substance by 1 K is called

A)enthalpy
B)internal energy
C)specific heat capacity
D)temperature

Question 21

Measure of average kinetic energy of molecules is

A)temperature
B)energy
C)internal energy
D)enthalpy

Question 22

Energy of molecules of any substance is known as

A)kinetic energy
B)potential energy
C)internal energy
D)chemical energy

Question 23

Due to evaporation from certain surface, it's temperature

A)falls
B)increases
C)doesn't change
D)becomes zero

Question 24

Change of liquid in to gas without boiling is called

A)vaporization
B)sublimation
C)boiling
D)evaporation