HPSC PGT Physics Mock Test - 6 - HPSC TGT/PGT MCQ

The correct answer is Ethyl mercaptan.

Key Points

• The stench due to leakage from the LPG cylinder because of Ethyl mercaptan.
  • LPG gas is basically propane and butane.
  • It is odourless in its natural state.
  • The smell that you notice when there is a leak is actually the stench of an entirely different agent, called ethyl mercaptan​.
    • This substance is added to the gas when it leaves the main storage terminals.
• Hence, option 4 is correct.

• Methane :
  • Methane is a chemical compound with the chemical formula CH₄.
  • Methane is a one-carbon compound in which the carbon is attached by single bonds to four hydrogen atoms
  • It is a group-14 hydride and the simplest alkane and is the main constituent of natural gas.
  • It is a colourless, odourless, non-toxic but flammable gas.
  • It has a role as a fossil fuel, a member of greenhouse gas, and a bacterial metabolite.
• Butane :
  • Butane or n-butane is an alkane with the formula C₄H₁₀.
  • Butane is a gas at room temperature and atmospheric pressure.
  • Butane is a highly flammable, colourless, easily liquefied gas that quickly vaporizes at room temperature.
  • Butane is a hydrocarbon and a highly flammable, colourless, odourless, easily liquefied gas.
  • It is typically used as fuel for cigarette lighters and portable stoves, a propellant in aerosols, a heating fuel, a refrigerant.
• Propane :
  • Propane is a three-carbon alkane with the molecular formula C₃H₈.
  • It is a gas at standard temperature and pressure, but compressible to a transportable liquid. 
  • Propane is a flammable hydrocarbon gas that is liquefied through pressurization and commonly used for fuel in heating, cooling, hot water, and vehicles.
  • Propane can also be used for refrigerants, aerosol propellants, and petrochemical feedstock.​ 

The correct answer is Inscriptions.

Key Points

• Writings on hard surfaces like stone or metal are called Inscriptions.
• Often kings got their orders inscribed so that people could see, read and obey them.
• Other inscriptions have the activities done by men and women recorded on them.
• Kings kept record of their victories in the form of inscriptions.

 Thus, we can say that writings on hard surfaces like stone and metals are called Inscriptions.

Additional Information

•  Manuscripts were written on palm leaves or birch.

The correct answer is ​Palwal.

• Mahatma Gandhi was arrested on April 10, 1919, when he was going to Punjab against the Rowlatt Act.

Key Points

• Palwal Railway station is 29 km from Faridabad.
• This was the place where Mahatma Gandhi was arrested for the first time.
• In his remembrance, a building called ‘Gandhi Ashram’ is made.
• Palwal is the 21st district of Haryana and Palwal city is the headquarters of this district.

Additional Information

• Palwal got its name from a demon ‘Pulwasur’ who ruled this place during the time of Pandavas.
• He was killed by Balram, the elder brother of Shri Krishna.
• In memory of this incident ‘, the Baldev chat ka Mela festival is organized every year.

The correct answer is Kandud.

Key Points

• The old name of the Mahendragarh district of Haryana was Kanaud.
• The previous name was derived from the Kanaudia group of Brahmins.
• During the middle of the nineteenth century, it came to be known as Mahendragarh.

Additional Information

• In 1861, ruler Maharaja Narendra Singh of Patiala principality named this fort in Mahendergarh in honor of his son Mohinder Singh.
• This District has 3 Subdivisions: Narnaul, Mahendragarh, and Kanina.
• Narnaul city is the administrative headquarters of the district and also the largest city in the district.
• Mahendragarh district is divided into 5 tehsils, Narnaul, Nangal Chowdhary, Kanina Mahendragarh, and Ateli.

1) 8, 4, 3, 7, 1, 5, 2, 6

2) 5, 2, 7, 3, 4, 1, 8, 6

3) 3, 1, 6, 8, 4, 5, 2, 7

4) 1, 4, 8, 3, 2, 5, 7, 6

'POLITICS' is a meaningful English word.

Hence, '1, 4, 8, 3, 2, 5, 7, 6' is the correct answer.

The logic followed here is:

The figure in image 2 is water image of the figure in image 1. The figure in image C of answer figure will be the water image of the figure in image 3.

Hence, image C of answer figure is the correct answer.

The family chart is as follows:

i) A is father of C and D is son of B.

ii) E is brother of A.

iii) If C is sister of D

Drawing the family tree as per the given information:

Thus we can see B is the wife of A.

E is the brother of A.

Thus we can conclude B is the sister-in-law of E.

Hence, the correct answer is "Sister-in-law".

NEP 2020 recommends the incorporation of internships and projects to promote experiential learning.

If the intensity of central maxima is I, then intensity due to individual source must be I/4. So, if one of the slit is closed then due to remaining slit, intensity will be I/4.

Angular frequency of the ac signal w=2πν
∴ w=2π(50)=100π
Capacitive reactance X_c​=1/wC​
∴ X_c​=1/(100π×786×10⁻⁶)​=4Ω
Inductive reactance X_L​=w_L
∴ X_L​=100π×(25.48×10−3)=8Ω
Impedance of the circuit Z=√[R²+(X_L​−X_c​)²​]
∴ Z=√[3²+(8−4)²​]=5Ω
 Phase difference ϕ=tan⁻¹[(XL​−Xc​​)R]
Or ϕ=tan⁻¹((8−4​)/3)=tan⁻¹(4/3​)
⟹ ϕ=53.13o
Power factor cosϕ=cos53.13o=0.6
Power dissipated in the circuit
P=I_v²R
Now, Iv=I₀/√2=E₀/√2Z=283/(1.414×5)=40A
∴P=I_v²R=(40)²×3=4800 watt

From conservation of angular momentum, 
mr₀ = r/2 = mvr
⇒ v = v₀/2
From conservation of energy,

I=(I1)cosωt+(I₂)sinωt
(I²)_mean=I₁²cos²ωt+I₂²sin²ωt+I₁I₂cosωtsinωt
I₁²×(1/2)×i₂²×(1/2)+2_I1I₂×0
I_rms=√(i²)_mean=√(I₁²+I₂²/2)=(1/√2)( I₁²+I₂²)^1/2

The velocity at P is in the X-direction (given).

After P, the positively charged particle gets deflected in the x – y plane toward – y direction and the path is non-circular.

Since in option (b), electric field is also present therefore it will also exert a force in the + X direction.
The net result of the two forces will be a non-circular path.
Only option (b) fits for the above logic. For other option, we get some other results.

The magnetic field near the conducting rod due to long current carrying wire is 
B= μ₀​I/2πr ​ (using Ampere's law, ∫B.dl=μ_0​I)
Now, induced emf due to moving rod is e=Blv= (μ₀​I/2πr) ​×lv= μ₀​vIl/2πr

Constructive interference occurs when the path differences (S₁​P−S₂​P) is an integral multiple of λ or (S₁​P−S₂​P)=nλ
Where n=0,1 ,2 3,….

Voltage across the electrodes of a cathode ray gun, V=500V
Charge of the electron=1.6x10^-19
Energy=eV
E= 1.6x10^-19 x 500
E=800 x 10^-19 J
E=8 x 10^-17 J

The speed of any electromagnetic waves in free space is the speed of light c = 3x10⁸ m/s. Electromagnetic waves can have any wavelength λ or frequency f as long as λf = c.

Angle of dip is 90^o at geographical North Pole because attraction on the North Pole of needle is very strong and the needle remains in vertical plane. At the magnetic equator, the needle will point horizontally, i.e. dip angle is 0^o. As you move from the magnetic equator towards the magnetic pole, the angle increases in the northern hemisphere. So, the angle of dip is maximum.

We know that torque

The direction of the current will be anticlockwise.
 
According to Lenz's law, the current in the coil will be induced in the direction that'll oppose the external magnetic field .
As the flux due to the external magnet is increasing ( as the N-pole is brought close ) , the coil will have to induce current in the anticlockwise direction to oppose this increase in flux and not in clockwise direction as that'll end up supporting the external flux.

The actual mass is always less than the sum of the individual masses of the constituent protons and neutrons because energy is removed when the nucleus is formed. This energy has mass, which is removed from the total mass of the original particles.

According to Fleming’s right-hand rule induced current flows from Q to P.
Hence P is at higher potential and Q is at lower potential. 
Therefore, A is positively charged and B is negatively charged.
Hence:
q_A​=+800μC and q_b​=−800μC

The result of an addition or subtraction in the number having different precisions should be reported to the same number of decimal places as present in the number having the least number of decimal places.

The final result should, therefore, be rounded off to one decimal place, i.e. 663.8

Electric potential is a pure Scalar quantity, The reason is as follows.
The Electric Potential is defined as the amount of work-done per unit positive charge to bring from infinity to that point under the influence of the primary charge only.
U=W/q
And work done is defined as the dot product of force and displacement which is a scalar quantity.
W=F.S
Thus Electric potential is a scalar quantity.

Magnetic poles exist in pairs. It is not possible to isolate a north pole or a south pole. Magnetic field lines start from the north pole and go to the south pole and return to the north pole. They form continuous closed loops unlike electric lines of force which do not as an electric monopole, a single charge does exist.