101. In which of the following conditions wet clothes will dry earliest?

1. 100% RH, 60°C temperature
2. 100% RH, 20°C temperature
3. 20% RH, 20°C temperature
4. 20% RH, 40°C temperature

Option “4” is correct.
The wet clothes will dry earliest at minimum humidity & maximum temperature. Thus according to options given in question, option (d) will dry the wet clothes earliest.
102. In the night wind blows fast, dew is not formed because-

1. Rate of evaporation is fast
2. Moisture in air is low
3. Temperature is high
4. Sky is not clear

Option “1” is correct.
Dew is not formed on the night of strong wind as due to strong wind the rate of evaporation is fast. Thus, the particles of the dew tend to evaporate.
103. When beams of red, blue and green lights fall on the same spot, the colour of the light becomes:

1. Violet
2. Red
3. Yellow
4. White

Option “4” is correct.
Red, green and blue are referred to as the primary colours of light. If we add the pair of primary colours we obtain white colour.
104. What is the distance between two successive crests or successive troughs called?

1. Amplitude
2. Wavelength
3. Frequency
4. None of these

Option “2” is correct.
The distance between two successive crests or two successive troughs is the wavelength for a transverse wave.
105. Diffusion of light in the atmosphere takes place due to:

1. Carbon dioxide
2. Dust particles
3. Helium
4. Water vapours

Option “2” is correct.
Sunlight is the mixture of different colours. When it passes through the atmosphere it is scattered by the air molecules, particles of dust and other subtle materials which are present in the pathway.
106. When a mirror is rotated by an angle θ, the reflected ray will rotate by:

1. 0
2. θ/2
3. θ
4. 2θ

Option “4” is correct.
If a plane mirror is rotated through a certain angle, then the reflected ray rotates through twice of that angle. So if a mirror is rotated by an angle θ, the reflected ray will rotate by 2θ.
107. Force of attraction between the molecules of different substances is called-

1. Surface tension
2. Cohesive force
3. Adhesive force
4. None of above

Option “3” is correct.
Adhesive forces are the attractive forces between unlike molecules.
108. The speed of light will be minimum while passing through-

1. Glass
2. Vacuum
3. Water
4. Air

Option “1” is correct.
Any of the object or material which has the highest refractive index has the minimum speed of light. The glass has the highest refractive index among other like, vacuum, water and air.
109. The radius of curvature of the plane mirror is:

1. Zero
2. One
3. Infinity
4. Between one and infinity

Option “3” is correct.
The radius of curvature of plane is infinity.
110. Which one of the following is the best conductor of electricity?

1. Mica
2. Copper
3. Gold
4. Silver

Option “4” is correct.
Electrical conductivity is a measure of the amount of electrical current under a material can carry. The most electrically conductive element is silver.
Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

16 thoughts on “Physics”

  8. Dolly.

    Hi I’m dolly..
    Jo bhi lok ye app download krk pdhai krr kre hai vo unka future boht hi jyada bright hone vala hai.. because baat free off cost prhne ki nahi hai,baat kaise study krne ki hai…fhir chahe vo jaise bhi ho…main sbko bss itna hi kehna chahti hu ke boh ache se iss app ka use kro and kisi bhi competitive exam ke liye ye app boht acha hai…and please comment jrur chod ke jna .. thank you

  10. lista escape roomów

    hey there and thank you for your info – I’ve certainly picked up something
    new from right here. I did however expertise several technical points using this website, as I experienced
    to reload the website lots of times previous to I could
    get it to load correctly. I had been wondering if your hosting is OK?
    Not that I am complaining, but sluggish loading instances times will very frequently affect your
    placement in google and can damage your high quality score if advertising and marketing
    with Adwords. Anyway I am adding this RSS to my e-mail and can look out for much more of your respective intriguing content.
    Make sure you update this again soon.. Escape rooms hub

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top