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	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
2	Compton was awarded Nobel prize in physics in	A. 1921 B. 1923 C. 1925 D. 1927
3	The photon of radio-waves has energy of about	A. 1 Me V B. 1 Ke v C. 10^-10e v D. 10¹⁰e v
4	When platinum wire is heated, it appears cherry red at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
5	Wave nature of particle was proposed by	A. Einstein B. Plank C. De-Brogile D. Max well
6	The special theory of relatively treats the problems involving:	A. Inertial frames of reference B. Non-inertial frames C. Non-accelerated frame D. Botha (A) and (C)
7	A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is	A. 1.66 m B. 1.66 x 10^-10m C. 1.66 x 10^-29cm D. 1.66 x 10^-29m
8	Strictly speaking, the earth is:	A. An accelerated frame of reference B. A non-inertial frame of reference C. An inertial frame of reference D. ^{A non-accelerated frame of reference}
9	If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers	A. larger B. shorter C. equal D. none of these
10	A photon is considered to have	A. Momentum B. Energy C. Wavelength D. All of the above

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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

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

Practically the quantity v/c is always:

Absolute motion cannot be detected

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

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

According to the special theory of relativity, a moving clock

The mass of an object will be doubled at speed

Converse of pair production is known as

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

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

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

Max Planck received the Nobel Prize for his discovery of energy quants in:

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

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

The special theory of relatively treats the problems involving:

When platinum wire is heated, it appears cherry red at

Strictly speaking, the earth is:

The special theory of relativity treats problems invoving

In photoelectric effect the energy of ejected electrons depend on

A non-inertial frame of reference is one, in which

Which of the following is not an example of intertial frame

Electromagnetic radiation or photons interact with matter in

Intensity of light determines the:

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

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:

Momentum is a parameter associated with

the symbol to be used in relativity problems denotes:

There is no way to detect:

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

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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