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 value of threshold frequency for different metals is	A. different B. same C. may be different or may be same D. none of these
2	Which of the following is not an example of intertial frame	A. a body placed on the surface of earth B. a body placed in a car moving with uniform velocity C. a body placed in a car moving with same acceleration D. none of these
3	The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:	A. Wien's constant B. Stefen's constnat C. Planck's constant D. Boltzmann's constant
4	de-Broglies hypthesis was experimentally verified by	A. Maxwell B. Compton C. Einstein D. Davison and Germer
5	In process of annihilation of matter, the two photons produced move in opposite direction to converse	A. momentum B. charge C. energy D. mass
6	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)
7	The positron was discovered by:	A. In cosmic radiation B. In 1932 C. By Carl Anderson D. All above
8	The special theory of relativity is based on:	A. Four postulates B. Three postulates C. Two postulates D. One postulate
9	When a platinum wire is heated, it appears dull red at about	A. 500°C B. 900°C C. 1100°C D. 1300°C
10	According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body	A. Remains constant B. Decreases C. Increases to infinity D. Reduced to zero

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

Wien's constant is measured in:

0.1 kg mass will be equivalent to the energy

Converse of pair production is known as

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

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

Victor de-Brogile received the Nobel prize in physics in

The energy of photon 'E' is proported to

The inside cavity of the black body is

Compton studied the scattering of x-rays by loosely bound electrons from:

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

When platinum wire is heated, it appears cherry red at

The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes

Photocell is a device which converts

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

According to the special theory of relativity, a moving clock

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

The concept of direction and position are purely

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

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

The energy of the 4th orbit in hydrogen atom is

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

The special theory of relativity is based on the

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

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

Compton shift refers to:

Intensity of light determines the:

In the compton's effect, it is found that the wavelength of incident x-rays is

If a body reaches a speed equal to the speed of light, then its mass will became

The energy of a photon is represented by

With the help of 50 K v electron microscope, a resolution of

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