ECAT Pre General Science Chapter 19 online mcq test with answers for Physics chapter 19 (Dawn of Modern Physics)

Top Scorers Of ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQ`s Test

A

Asghar Ali 03 - Mar - 2021 10 Min 50 Sec 100/120
S

shamsuddin 19 - Aug - 2021 10 Min 50 Sec 75/120
K

khadim Hussain 03 - Mar - 2021 10 Min 50 Sec 75/120
A

Ali ahmad 19 - Jul - 2018 09 Min 44 Sec 70/120
A

Aarij 08 - Dec - 2024 02 Min 25 Sec 65/120
W

Waleed Ahmed 26 - Feb - 2023 10 Min 00 Sec 65/120
Z

Ziyad Rehman Sheikh 16 - Nov - 2022 07 Min 21 Sec 40/120
M

maha 01 - Mar - 2023 04 Min 24 Sec 35/120

ECAT Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	The Stephen-Boltzmann law for the black body radiation is given by	A. E = T² B. E = -T² C. E = T⁴ D. E = -T⁴
2	The special theory of relativity is based on:	A. Four postulates B. Three postulates C. Two postulates D. One postulate
3	With the help of 50 K v electron microscope, a resolution of	A. 0.5 to 1 m to possible B. 1 m to 10 m is possible C. 0.5 to 1 nm is possible D. 1 to 10 nm is possible
4	When a platinum wire is heated, it appears yellow at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
5	Photocell is a device which converts	A. chemical energy into electrical energy B. electrical energy into light energy C. heat energy into electrical energy D. light energy into electrical energy
6	de-Broglies hypthesis was experimentally verified by	A. Maxwell B. Compton C. Einstein D. Davison and Germer
7	The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:	A. Lummer B. Planck C. Pringsheim D. Both (A ) and (B)
8	The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of	A. 2 cm/s B. 20 cm/s C. 200 cm/s D. 2000 cm/s
9	The photoelectric effect, the maximum energy of photoelectrons depends on the	A. particular metal surface B. frequency of incident light C. both of them D. none of them
10	According to the Max plank, energy is redialed or absorbed in	A. discrete packets B. continuous waves C. either of them D. none of these

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

ECAT Pre General Science Physics Chapter 19 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics

ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics

Practically the quantity v/c is always:

An intertial frame of reference is a frame of reference which is

The length contraction happens only

According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body

The concept of direction and position are purely

When a platinum wire is heated, it appears yellow at

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

The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum

The Stephen-Boltzmann law for the black body radiation is given by

A particle having mass and charge equal to that of an electron is called:

According to the special theory of relativity, a moving clock

When platinum wire is heated, then at the temperature of 500 oC, it becomes:

According to Einstein, with the great increase in the speed of the body the relativistic length of the body

Which of the following is not an example of intertial frame

When the atomic particle are moving with velocities approaching that of light:

The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by

The special theory of relatively treats the problems involving:

When a position comes close to an electron they annihilate into photons such that

the symbol to be used in relativity problems denotes:

A photon is considered to have

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

The special theory of relativity is based on the

The photoelectric effect, the maximum energy of photoelectrons depends on the

If a material object moves with the speed of light 'C' its mass becomes

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

G.P. Thomson observer experimentally that electrons and neutrons possess

When low energy photon interact with a metal,which of the following effect is likely to be taken place

0.1 kg mass will be equivalent to the energy

When a high energy photon interact with a metal, which of the following effect is most likely to be taken place

The Einstein's changes in length, mass and time are not observed in common life because

Prepare Complete Set Wise ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQs Online With Answers

Set 1

Set 2

Set 3

Set 4

Set 5

Topic Test

Top Scorers Of ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQ`s Test

ECAT Physics Chapter 19 Important MCQ's

Test Questions

Share your comments & questions here

When platinum wire is heated, then at the temperature of 500 ^oC, it becomes: