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	The Einstein's changes in length, mass and time are not observed in common life because	A. We dont observer then seriously B. The masses are too large C. Their speed is too small than the speed of right D. All of the above
2	When a platinum wire is heated, it appears yellow at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
3	The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is	A. 100 J B. 1.6 x 10^-17J C. 100 eV D. 1.6 x 10^-17eV
4	When a platinum wire is heated, it appears white at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
5	The way through which electromagnetic radiations or photons interact with matter depends upon their:	A. Wavelength B. Frequency C. Energy D. Temperature
6	According to the special theory of relativity, time is	A. absolute quantity B. not absolute quantity C. constant quantity D. none of these
7	Momentum is a parameter associated with	A. wave motion B. particle motion C. neither wave nor particle motion D. none of these
8	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
9	According to the de-Brogile relation, an object of large mass and ordinary speed has	A. very small wavelength B. very large wavelength C. very small frequency D. all of these
10	An inertial frame is that frame in which	A. a>0 B. a=0 C. a<0 D. none of these

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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

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

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

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

Photocell is a device which converts

Converse of pair production is known as

According to the special theory of relativity

An inertial frame is that frame in which

When a platinum wire is heated, it appears dull red at about

The emission of electrons from a metal surface when exposed to light of suitable frequency is called the

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

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

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

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

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

Which of the following is not an example of intertial frame

Which of the following phenomenon proves the particle nature of light

The value of the plank's constant 'h' is given by

Davision and Germer performed experiment to verify

Compton shift refers to:

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

Electromagnetic radiation or photons interact with matter in

The energy of photon 'E' is proported to

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

The special theory of relativity treats problems invoving

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

Wave nature of particle was proposed by

There is no way to detect:

The positron was discovered by:

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

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

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ECAT Physics Chapter 19 Important MCQ's

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