HPSC PGT Physics Mock Test - 2 - HPSC TGT/PGT MCQ

The correct answer is The Supreme Court.

Key Points 

• The Supreme Court of India is called the custodian of the Constitution in India.
• The highest court in India, the Supreme Court is considered as the guardian of the Constitution.
• The conflicts or quarrels of jurisdiction between the central government and the state governments or between the legislature and the executive are decided by the court.
• It upholds and uplifts the rule of law and also ensures and protects citizens’ rights and liberties as given in the Constitution.
• Therefore, the Supreme Court is also known as the Guardian of the Constitution.​

Additional Information 

• The Indian constitution provides for a provision of the Supreme Court under Part V (The Union) and Chapter 6 (The Union Judiciary).
• The Supreme Court of India is the highest judicial court and the final court of appeal under the Constitution of India, the highest constitutional court, with the power of judicial review.
• India is a federal state and has a single and unified judicial system with a three-tier structure, i.e. Supreme Court, High Courts, and Subordinate Courts.

The correct answer is Sharafabad.

• Bahadurgarh was founded by Rathi Jats and was formerly known as Sharafabad.
  • ​Bahadurgarh is a city and a municipal council with 31 wards in the Jhajjar district in the state of Haryana.
  • It is called the "Gateway to Haryana".

Key Points

• Bahadurgarh was founded by the Mughal Emperor Alamgir II and gave the city in jagir to Bahadur Khan and Tej Khan, the Baloch rulers of Farrukhnagar in 1754, who changed its name from Sharafabad to Bahadurgarh.
• Jhajjar is one of the 21 districts of Haryana state, India.
  • Jhajjar district, Haryana was carved out of Rohtak district on July 15, 1997. 

The correct answer is ​Raghuvendra Tanwar.

Key Points

• Professor emeritus, Kurukshetra University Raghuvendra Tanwar has been appointed as the Chairman of the Indian Council of Historical Research (ICHR).
• His appointment is for a period of three years from the day he assumes office.
• Tanwar was awarded the prestigious UGC National Fellowship (Research Award) 2002-2005. 
• He is reputed for his study of India’s partition, particularly Punjab.

Important Points

• He was appointed an open selection professor in 1997 and has also worked as the University’s Dean Academic Affairs and Dean Social Sciences.
• He superannuated in February 2015 and in July 2016 was appointed Director of the Haryana Academy of History and Culture.​
• The primary aim and objective of the Indian Council of Historical Research is to promote and give directions to historical research and to encourage and foster objective and scientific writing of history. 

Additional Information

• Recent Appointments:
  • Atul Dinkar Rane has been appointed as the new Chief Executive Officer and Managing Director of the BrahMos Aerospace Limited that manufactures the BrahMos supersonic cruise missile.
  • PV Sindhu has been appointed as a member of the Badminton World Federation's (BWF) Athletes' Commission.
  • Senior diplomat Pradeep Kumar Rawat has been appointed as India's next Ambassador to China in December 2021.
  • Axis Bank's board has approved the appointment of Ashish Kotecha, a nominee of Bain Capital, as an additional non-executive Director.
  • Kotak Mahindra Bank has appointed Ashu Suyash as an independent Director of the bank for a period of 5 years.

Preparing the family tree using the following symbols:

On decoding L θ Z β T means L is the mother of Z and Z is the sister of T.

i) L is mother of T → True
ii) L is father of T → False (as L is mother of T) 
iii) T is father of L → False (as T is either son or daughter of L)
iv) Z is daughter of T → False (as Z is sister of T)
Hence, 'L is mother of T' is the correct answer.

If a student passes a comment, then the teacher must ignore the comment and continue taking class. 

The answer provided in the forum is wrong,the correct answer would be option A,B,C,D.
Solution:
Current is constant across the cross-section.
E ∝1/A ;     r∝1/A
=>i2r∝1/A
∴heat at Q>heat a P.
∴A,B,C,D are correct.

Potential = high potential - low potential
so our high potential is 90V and low potential is 10V,
potential = 90-(-10)=100V

If a dish is kept at an orientation with a marble placed on it and if the marble in figure is displaced slightly, it would rattle about for a while and come to rest in its original place.  This is the example of Stable Equilibrium.
When a body tries to regain its equilibrium position after being slightly displaced and released, it is said to be in stable equilibrium.

Conservation of angular momentum is one of the key conservation laws in physics, along with the conservation laws for energy and (linear) momentum. All the top 3 options use the application conversion of angular momentum.
But the cause of fruit drop can occur due to many reasons such as a severe pest infestation can stress the tree enough to cause fruit drop, Sudden changes in temperature, particularly when high temperatures occur at or shortly after fruit set, can cause fruit drop.

Electric field due to a charged ring in given by: -
at point p
∣​E∣​= KQx​ /(R²+x²)^3/2        Q =λ(2πr)
at a large distance, x≫R, so :- R2+x2≃x2
⇒∣​E∣​= K&x​/(x²)^3/2=KQ/x²​=Eαx⁻²
so at a large distance, the ring behaves as a point particle.

∵ V = (4/3)πr³
% error is volume = 3 × error in radius = 3 × 1 = 3%

The First minimum is located at the place where the central maximum ends. And the first minimum spreads further upto half the fringe width.

We know that PE + KE = TE = constant
Hence at the extremis TE = PE = ½ kz²  
Where z is amplitude and k is shm constant.
Thus when KE = ⅓ PE
We get PE = ¾ TE =  ½ kz²
Hence we get  ½ kx² = ¾  ½ kz²
We get x/z = √3/4 
= 1.73 / 2
= .87
Thus we get x is 87 percent of the amplitude.

Area under F-t curve = change in momentum = 2 x (-2) + 1 x 4 = -4 + 4 = 0  

A cloth covers a table. Some dishes are kept on it. The cloth can be pulled out without dislodging the dishes from the table. This phenomenon can be seen when the cloth is pulled very quickly. It is explained by the principle of inertia, not by Newton's Third Law of Motion. Inertia is the tendency of an object to resist changes in its state of motion, which is why the dishes tend to stay in place when the cloth is pulled out quickly.

The number of images formed when two mirrors are inclined to each other is given by :
n=(360/θ -1)
here θ= 90°[since walls are perpendicular]
so, number of images=n=360/90-1
=4-1
=3
These 3 images are formed by a combination of two adjacent walls with the object itself acts as objects for the ceiling mirror. So totally 4 images are formed.
Hence total number of images formed are 4+3= 7
 

A photon is massless, has no electric charge, and is a stable particle. In vacuum, a photon has two possible polarization states. The photon is the gauge boson for electromagnetism, and therefore all other quantum numbers of the photon (such as lepton number, baryon number, and flavour quantum numbers) are zero.
 

We know that,
Phase difference=K× path difference. K=2π/ λ.
Therefore, phase difference=(2π/ λ) ×( λ/3)=2π/3=120 degree.

Magnetic field at the centre due to current in arc ABC is

Magnetic field at the centre due to current in arc ADB is

Therefore net magnetic field at the centre

M=9x10^-31Kg,r=4.5x10^-10
V=8x10⁵m/s
L=mvr
  =9x10^-31 x 4.5 x 10^-10 x 8 x 10⁵ = 3.24 x 10^-34 kgm²s^-1

In 9s, the distance travelled = 4A × 3 = 12A 

Imagine, now it is at

The relative error in a physical quantity raised to the power k is the k times the relative error in the individual quantity.

Suppose Z = A²,
Then,
ΔZ/Z = (ΔA/A) + (ΔA/A) = 2 (ΔA/A).
Hence, the relative error in A² is two times the error in A.

The Measurement of a given quantity is essentially an act or result of comparison between a quantity whose magnitude (amount) is unknown, with a similar quantity whose magnitude (amount) is known, the latter quantity being called a Standard.

• We know that with retardation of a car with an initial speed of 60 kmph stops after 20m.
• We know that v² = 2as  (third equation of motion). Thus we get that for some constant retardation, stopping distance is proportional to the square of the initial speed.
• Hence when the initial speed is 120kmph we get,
  s = 20 x (120/60)²
  s = 80 m

Paramagnetic materials are those when suspended freely inside the magnetic field, it slowly sets itself parallel to the direction of the magnetic field. When placed in a non-uniform magnetic field, it tends to move from weaker to a stronger magnetic field.

CONCEPT:

Conservative force: 

• A force is conservative if the work done by the force in displacing an object from one point to another point is independent of the path followed by the object and depends only on the endpoints.
  • Electrostatic forces, gravitational forces, elastic forces, magnetic forces, etc and are examples of a conservative force.

Non-conservative forces: 

• A force is said to be non-conservative if work done by or against the force in moving a body from one position to another, depends on the path followed between these two positions.
  • Example:  Frictional force, Viscous force, Airdrag, etc.

EXPLANATION:

• If a body is moved from position A to another position B on a rough table, work done against frictional force shall depend on the length of the path between A and B and not only on the position A and B.
• Therefore, in non-conservative force work done by or against the force in moving a body from one position to another, depends on the path followed between these two positions. Therefore option 2 is correct.

Option A: False. The total path length is the actual distance traveled by the particle, whereas the magnitude of the displacement vector is the straight-line distance between the initial and final positions. These two are only equal if the particle moves in a straight line without changing direction. Otherwise, the path length is greater than the magnitude of displacement.

Option B: True. The magnitude of a vector is always a scalar (it has only magnitude, no direction).

Option C: True. Three vectors not lying in the same plane cannot form a closed triangle (null vector condition), as they cannot satisfy vector addition due to being in different planes.

Option D: True. The average speed is defined as the total path length divided by the time taken, while average velocity is the magnitude of the displacement divided by time. Since the total path length is always greater than or equal to the magnitude of displacement, the average speed is greater than or equal to the magnitude of average velocity.

Thus, Option A is the false statement.