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

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ECAT Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	A photon is considered to have	A. Momentum B. Energy C. Wavelength D. All of the above
2	If a material object moves with the speed of light 'C' its mass becomes	A. Equal to its rest mass B. Four times of its rest mass C. Double of its rest mass D. Infinite
3	Electromagnetic -radiation means:	A. Photons B. protons C. Electrons D. Mesons
4	The idea of quantization of energy was proposed by:	A. Einstein B. Max.Planck C. Maxwell D. Bohr
5	Davision and Germer performed experiment to verify	A. de-Brogile hypothesis B. theory of relativity C. Newton's law of gravitation D. Mass-energy relation
6	Newton's law of motion do not hold in	A. an accelerated frame of reference B. an unaccelerated frame of reference C. both of these D. none of these
7	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
8	An inertial frame is that frame in which	A. a>0 B. a=0 C. a<0 D. none of these
9	There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as	A. maximum frequency B. minimum frequency C. threshold frequency D. all of these
10	There is no way to detect:	A. Absolute uniform motion B. Accelerated motion C. State rest D. State of motion

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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

Intensity of light determines the:

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

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

Newton's law of motion do not hold in

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

From the theory of relativity, momentum p of the photon is related to energy as

The mass of an object will be doubled at speed

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

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

The general theory of relativity treats problems involving

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

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

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

An inertial frame is that frame in which

The special theory of relatively treats the problems involving:

The special theory of relativity is based on:

The energy of photon 'E' is proported to

When platinum wire is heated, it appears cherry red at

In process of annihilation of matter, the two photons produced move in opposite direction to converse

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

The idea of quantization of energy was proposed by:

Converse of pair production is known as

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

The concept of direction is purely:

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

Which of the following is not an example of intertial frame

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

Compton shift refers to:

Momentum is a parameter associated with

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