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Fill in the Blanks Questions

Multiple choice physics free, damped and forced oscillations resonance: examples and uses resonance oscillatory motion

Resonance occurs when a vibrating system or external force drives another system to ____ with greater _ at a specific preferential ______. Fill in the blanks. 

  1. oscillate, amplitude, frequency

  2. oscillate, frequency, amplitude

  3. vibrate, velocity, frequency

  4. vibrate, frequency, velocity
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$Answer:-$ A

In physics, resonance is a phenomenon that occurs when a given system is driven by another vibrating system or external force to oscillate with greater amplitude at a specific preferential frequency.

Resonance occurs when a system is able to store and easily transfer energy between two or more different storage modes (such as kinetic energy and potential energy in the case of a pendulum). However, there are some losses from cycle to cycle, called damping. When damping is small, the resonant frequency is approximately equal to the natural frequencyof the system, which is a frequency of unforced vibrations. Some systems have multiple, distinct, resonant frequencies.
Resonance phenomena occur with all types of vibrations or waves: there is mechanical resonance, acoustic resonance, electromagnetic resonance, nuclear magnetic resonance(NMR), electron spin resonance (ESR) and resonance of quantum wave functions. Resonant systems can be used to generate vibrations of a specific frequency (e.g., musical instruments), or pick out specific frequencies from a complex vibration containing many frequencies (e.g., filters).

Multiple choice zoology frog circulatory system in frog frog - digestive system, circulatory system, excretory system and reproductive system animal diversity - ii (phylum: chordata)

Select the correct option:

Fill up the blanks in the following paragraph by selecting the correct option.
The vascular system of frog is well-developed ______ (i) type. The blood vascular system involves heart, blood vessels and blood. Heart has 3 chambers, two atria and one ventricle and is covered by a membrane called ______ (ii). A triangular structure called ______ (iii) joins the right attrium.

  1. (i)- open; (ii)- conus arteriosus; (iii)- neurilemma

  2. (i)- closed; (ii)- sinus venosus; (iii)- pericardium

  3. (i)- open; (ii)- neurilemma; (iii)- conus arteriosus

  4. (i)- closed ; (ii)- pericardium; (iii)- sinus venosus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The vascular system of frog is well-developed (i) 'closed' type. The blood vascular system involves the heart, blood vessels and blood. The heart has 3 chambers, two atria and one ventricle and is covered by a membrane called (ii) 'pericardium'. A triangular structure called (iii) 'sinus venosus' joins the right atrium.

So, the correct answer is '(i)- closed ; (ii)- pericardium; (iii)- sinus venosus'.

Multiple choice physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

Fill in the blank:

Lunar eclipse is a _______ phenomenon.

  1. common

  2. less common

  3. impossible

  4. regular
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the Sun, Earth, and Moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can only occur the night of a full moon. The type and length of an eclipse depend upon the Moon's location relative to its orbital nodes.
Unlike a solar eclipse, which can only be viewed from a certain relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of the Earth. A lunar eclipse lasts for a few hours, whereas a total solar eclipse lasts for only a few minutes at any given place, due to the smaller size of the Moon's shadow. 
Every year, there are at least two lunar eclipses and as many as five, although total lunar eclipses are significantly less common. 

Multiple choice physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

Fill in the blanks:

During the development of a thunder-storm, the air currents move ________ while the water droplets move _______.

  1. downward, upward

  2. upward, downward

  3. downward, downward

  4. upward, upward
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Thunder-storm occurs due to vigorous movements of air currents upward and water droplets downward. This leads to separation of charges.

Multiple choice physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

Fill in the blank:

When angle of incidence increases, glancing angle of incidence ________.

  1. decreases

  2. increases

  3. remains same

  4. becomes zero
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Angle of incidence $+$ Glancing angle of incidence $=90^0$

So, Glancing angle of incidence $=90^0 -$ Angle of incidence
This means, when angle of incidence increases, glancing angle of incidence decreases,