HPSC PGT Physics Mock Test - 5 - HPSC TGT/PGT MCQ

The correct answer is Sushila Mann.

Key Points

• Dr. Sushila Mann -
  • She is a scientist at Lala Lajpat Rai University of Veterinary and Animal Sciences (LUVAS).
  • She has been awarded the 'Punjabrao Deshmukh Outstanding Women Scientist Award 2021 on the 94th Foundation Day of the Indian Council of Agricultural Research.

Additional Information

• ​This award was given by Union Agriculture and Farmers Welfare Minister Narendra Singh Tomar.
• Dr. Maan is holding the responsibility of the Head of the Department in the Animal Biotechnology Department of Luvas.
• The award was given to Dr. Mann for his outstanding research work in the biotechnology area of veterinary science.
• This award is a special honor. Under this, he was given a certificate and a memento, and cash prize money.
• She has also been honored with the Haryana Vigyan Ratna Award in 2020 by the Haryana Government.

The Correct Answer is Punjabi Suba Movement.

Key Points

• The Punjabi Suba Movement led by the Akali Dal resulted in the formation of Punjab and Haryana.
• The movement was a long-drawn political agitation, launched by the Sikhs, demanding the creation of a Punjabi Suba, in the post-independence Indian state of East Punjab.
• The demand for a Punjabi Suba was first presented in April 1948 by Master Tara Singh of Shiromani Akali Dal.
• The state of Haryana was carved out of East Punjab on 1 November 1966 on a linguistic basis.

Let CP of the article be Rs. 100

⇒ SP of the article = 100 × 180/100 = Rs. 180

New cost price = 100 × 120/100 = Rs. 120

⇒ New profit = 180 – 120 = 60

Profit percentage = 60/120 × 100 = 50%

NEP 2020 proposes mandatory school attendance for all students until the age of 16 to reduce early dropouts.

Long distance radio broadcasts use short-wave bands because they can be reflected by the ionosphere of the earth's atmosphere and thus can be send to longer distances.

The internal energy of a system decreases by the same amount as the work done by the system.
 
Change in internal energy=work done+heat exchange
change in internal energy=work done if process has no heat exchange, i.e. it's adiabatic and the temperature must decrease
 

Given X is greater than 2Ω when the bridge is balanced

When the resistances are interchanged the jockey shifts 20 cm. Therefore

When we use white light, the central bright will have light from all wavelengths as none of them cancel out. Hence the central bright fringe appears white.
For other bright fringes, depending on the wavelength of light constructive interference will not take place for certain wavelengths. Hence they will not be white, rather will be coloured, hence differentiated from central fringe.

Explanation:Parallelogram law of vector addition is,If two vectors are considered to be the adjacent sides of a Parallelogram, then the resultant of two vectors is given by the vector which is a diagonal passing through the point of contact of two vectors.

The images of clouds and trees in water are always less bright than in reality because only a portion of the incident light is reflected and quite a large portion goes mid water.

Force due to electric field will make the charged particle released from rest to move in the straight line (that of electric field). Since the force due to magnetic field is zero, therefore, the charged particle will move in a straight line.

The chemical behavior of atoms is determined by the number and the configuration of the electrons in the atom. The number of protons in the nucleus determines the number of electrons in the atom.

• The no load current is about 2-5% of the full load current and it accounts for the losses in a transformer.
• These no-load losses include core(iron/fixed) losses, which contains eddy current losses & hysteresis losses and the copper (I²R) losses due to the no Load current.

Coulombs law states the force between two charged particles is directly proportional to the product of charges and inversely proportional to the square of distance between them.
So if the distance is doubled then the force would decrease 4 times.
So the new force would be 120/4=30 Newton.

Path difference = (l1 + l3) – (l2 + l4)
for destructive interference
Path difference = (2n + 1) λ/2
from (1) and (2)
(l1 + l3) – (l2 + l4) = (2n + 1) λ/2

Davisson and Germer Experiment, for the first time, proved the wave nature of electrons and verified the de Broglie equation. de Broglie argued the dual nature of matter back in 1924, but it was only later that Davisson and Germer experiment verified the results. The results established the first experimental proof of quantum mechanics. In this experiment, we will study the scattering of electrons by a Ni crystal.

Let the horizontal displacement of the plank, at an instant during its oscillation is x and its velocity is v.

For sustainable interference wavelengths have to be the same. So frequency has to be the same too. Contact phase relation is also necessary to sustain the interference pattern else the pattern will keep changing so rapidly that we will not see any pattern.
Equal intensity is not a requirement to keep pattern sustained.

Using formula for acceleration due to gravity,

When the radius is increased to five times,

Here mass of the earth is,

In order to maintain the same value for acceleration due to gravity:
g=g′

When we connect cells to form a battery, we join opposite ends(+ve with -ve and vice versa) to get supporting emf, i.e. net emf get added, but when we join the same polarities(-ve with -ve, like in the question), they oppose each other, hence net emf is the difference b/w them.
The expression for equivalent emf when two cells of emf’s
ε_eq = ε₁ - ε₂ (ε₁> ε₂)

The needle will point along W-E if the result of the earth’s magnetic field and magnetic field due to the coil have a resultant in the W-E direction. This happens if B cos 45^o=Earth's field
⟹ (μ0​nI​/2r) cos45^o=(4π×10−7×30×0.35​)/(2×0.12) ×(1/√2)​​=0.39G=Earth's magnetic field.

A freely falling body observes a constant downwards force of gravity which hence applies a constant downward acceleration upon the body.

Time taken by first drop to cover 5 cm (u = 0), is: 
h = 1/2 gt²
5 = 1/2 x 10 x t²
t = 1 sec
Hence, the interval is 0.5 sec for each drop.
Now distance fallen by second drop in 0.5 sec
h₁ = 1/2 gt²
= 1/2 x 10 x (0.5)²         
= 5 x 0.25 
= 1.25 m
Height above the ground ( of 2^nd drop) = 5 - 1.25 = 3.75 m

Earlier force between two particles is 
F=kq^1​q²​​/ r²
When distance is halved force becomes 
F′= kq₁​q²/(r/2)² ​​=4kq₁​q₂/r²​​=4F

Hypermetropia is corrected using converging lens.  In this defect the person is able to see far objects clearly but difficulty with near vision. The image is focused behind the retina rather than upon it. This occurs when eyeball is too short or the power of lens is too weak. By using a convex lens the defect is corrected.

The final image of the moon should be formed at a distance of 100 cm. Using a concave lens of focal length 100 cm will enable him  to see the moon distinctly.

Focal length of lens =-100 cm