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	When low energy photon interact with a metal,which of the following effect is likely to be taken place	A. pair production B. photoelectric C. Compton effect D. None of these
2	the dilation of time applies to the timing processes which are:	A. Physical B. Chemical C. Biological D. All of these
3	The existence of position was predicted by Dirace in	A. 1920 B. 1925 C. 1930 D. 1928
4	The energy of a photon is represented by	A. h/c² B. h/T C. hc² D. hf/c²
5	A non-inertial frame of reference is one, in which	A. law of inertial is valid B. all laws of physics are the same in all frames C. a>0 or a<0 D. a=0
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	Pair production is the phenomenon in which	A. matter is converted into energy B. energy is converted into matter C. light is converted into electrical energy D. electrical energy is converted into light
8	In photoelectric effect the energy of ejected electrons depend on	A. The frequency B. The intensity C. Both frequency and intensity D. None of these
9	Momentum is a parameter associated with	A. wave motion B. particle motion C. neither wave nor particle motion D. none of these
10	From the theory of relativity, momentum p of the photon is related to energy as	A. p = hfc B. p = hf/c C. p = f(hc,f) D. p = cf/h

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

The positron was discovered by:

The nature of radiations emitted by a hot body depends upon its:

Which of the following is not an example of intertial frame

When a platinum wire is heated, it appears orange red at

The threshold frequency of sodium is 6 x 106MHz. The cut-off wavelength for this metal will be

the dilation of time applies to the timing processes which are:

According to the special theory of relativity, a moving clock

When platinum wire is heated, it appears cherry red at

The special theory of relativity is based on:

The special theory of relativity treats problems invoving

Which one of the following physical quantities changes with relativistic speed

Davision and Germer performed experiment to verify

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

Photocell is a device which converts

Due to relative motion of observer and the frame of reference of events, time always:

A bar 1.0 m in length and located along x-axix moves with a speed of 0.75 c with respect to a stationary observer. The length of the bar as measured by the stationary observer is

The concept of direction and position are purely

Practically the quantity v/c is always:

According to the Max plank, energy is redialed or absorbed in

The energy of the 4th orbit in hydrogen atom is

As the light shines on the metal surface, the electrons are ejected

de-Broglies hypthesis was experimentally verified by

Converse of pair production is known as

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

Photoelectrons are emitted when ultraviolet light falls on:

The length contraction happens only

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

Photoelectric effect takes place with a photon of:

The value of the Stephen's constant for black body radiations is given by

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

The threshold frequency of sodium is 6 x 10⁶MHz. The cut-off wavelength for this metal will be