Question # 1

When a platinum wire is heated, it appears yellow at

Choose an answer

1600°C

900°C

1100°C

1300°C

The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is

Choose an answer

100 J

1.6 x 10^-17J

100 eV

1.6 x 10^-17eV

The general theory of relativity treats problems involving

Choose an answer

inertial frame of references

accelerating frame of references

both of these

none of these

Position was discovered by Carl Anderson in

Choose an answer

1920

1925

1928

1932

Newton's law of motion do not hold in

Choose an answer

an accelerated frame of reference

an unaccelerated frame of reference

both of these

none of these

A non-inertial frame of reference is one, in which

Choose an answer

law of inertial is valid

all laws of physics are the same in all frames

a>0 or a<0

a=0

A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is

Choose an answer

1.66 m

1.66 x 10^-10m

1.66 x 10^-29cm

1.66 x 10^-29m

The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of

Choose an answer

2 cm/s

20 cm/s

200 cm/s

2000 cm/s

The way through which electromagnetic radiations or photons interact with matter depends upon their:

Choose an answer

Wavelength

Frequency

Energy

Temperature

All of these

Max Planck received the Nobel Prize for his discovery of energy quants in:

Choose an answer

1718 AD

1918 AH

1818 AD

1918 AD

None of these

Photoelectric effect takes place with a photon of:

Choose an answer

Very high energy

Very low energy

Low energy

High energy

None of these

Compton was awarded Nobel prize in physics in

Choose an answer

1921

1923

1925

1927

Victor de-Brogile received the Nobel prize in physics in

Choose an answer

1925

1929

1932

1935

The energy of a photon is represented by

Choose an answer

h/c²

h/T

hc²

hf/c²

As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:

Choose an answer

Smaller

Lerger

Same

Much larger

None of these

In order to produce pair production, a photon must have a energy

Choose an answer

0.511 Me v

0.256 Me v

1.02 Me v

0.956 Me v

More Classes

Other Links

ECAT Physics Chapter 19 Dawn of Modern Physics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer