Physics Quiz SSC RRB

Question 1

An image formed by a plane mirror, that cannot be obtained on a screen is called ___________.

Solution:

Images formed by plane mirrors are virtual, upright, left-right reversed, the same distance from the mirror as the object’s distance, and the same size as the object. In optics, a virtual image is an image formed when the outgoing rays from a point on an object always diverge. The image appears to be located at the point of apparent divergence. Because the rays never really converge, a virtual image cannot be projected onto a screen.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 2

The intensity of a wave :
(I) follows inverse square law.
(II) is proportional to its amplitude.
(III) is proportional to the square of the amplitude.

Solution:

intensity is the power transferred per unit area, which is transmitted through an imagined surface perpendicular to the propagation direction. In the SI system, it has units watts per square metre (W/m2). It is used most frequently with waves in which case the average power transfer over one period of the wave is used.
Difficulty Level: Hard
Correct Attempts: 0%
Topic: Physics

Question 3

Which of the following particles has the dual nature of particle-wave?

Solution:

Correct Answer

The wave-particle dual nature suggests that under certain conditions an electron exhibits behaviour corresponding to a wave, and sometimes a particle. Davisson and Germer Experiment, for the first time, proved the wave nature of electrons and verified the de Broglie equation. While particle nature of electrons can be observed through cathode ray experiment.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 4

The least distance of distinct vision is

Solution:

Least distance of distinct vision is the minimum comfortable distance between the naked human eye and a visible object. It is 25cm for human eye.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 5

A metallic plate sticks firmly on the mouth of a water vessel made from another metal. Byway of heating, one can detach the plate from the vessel. This is because heat expands

Solution:

Since the vessel and plate are made from different metals, they would expand unequally and C. is the only answer which satisfies the condition.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 6

When an incandescent electric bulb glows

Solution:

Correct Answer

● Electricity flows through a thin wire in the light bulb called the filament.
● The filament used in a bulb has a property called “resistance.” Resistance is the amount of friction that an object will put against electricity flowing through it.
● A filament has a lot of resistance to electricity. Therefore as a result of this, the filament heats up and starts glowing, converting electrical energy to light energy.
● This is because of the Joule-effect, which means that resistances heat up when electrical current runs through them.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 7

Purpose of an optical filter is to : ________

Solution:

Purpose of an optical filter is to: transmit or absorb light of different colours. Optical filters are devices that selectively transmit light of different wavelengths, usually implemented as plane glass or plastic devices in the optical path which are either dyed in the bulk or have interference coatings. The optical properties of filters are completely described by their frequency response, which specifies how the magnitude and phase of each frequency component of an incoming signal is modified by the filter.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 8

Who Invented Induction Coil?

Solution:

Nicholas Callan invented the Induction Coil. It is the first type of transformer and used to produce high-voltage pulses from a low-voltage direct current (DC) supply. To create the flux changes necessary to induce voltage in the secondary coil, the direct current in the primary coil is repeatedly interrupted by a vibrating mechanical contact called an interrupter.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 9

Which method is used for creating a photo with the help of a laser beam in 3D?

Solution:

Holography is a method that uses the wave character of light, which depicts an exact description that goes beyond the options of the classic photography. A hologram is a 3dimensional picture made from a laser.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 10

One nanometer is equal to _____________ meters.

Solution:

One nanometer is equal to 10 raised to power of 9 meters, which means it is one billionth of a meter. Such measurements are most commonly used in nanotechnology, for building of extremely small machines.

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