HPSC PGT Physics Mock Test - 8 - HPSC TGT/PGT MCQ

The correct answer is Virat Singh.

Key Points

• Sh. Virat Singh is the current secretary of the Haryana Staff Selection Commission (HSSC).
• Haryana Staff Selection Commission (HSSC)
  • It ​is constituted by Haryana Government for the recruitment of Group C and D Services.
  • The Commission has been constituted with the purpose of recruiting capable, competent and highly skilled individuals by conducting various examinations for different posts.
  • It consists of five Members including a Chairman appointed by the Haryana Govt. on the recommendation of a collegium consisting of-
    • a Minister of Cabinet Rank
    • Chief Secretary to Govt. of Haryana
    • Legal Remembrance and Secretary to Govt. Haryana, Law and Legislative Department.
  • The Chairman/Member shall cease to be Chairman or Member of the Commission on attaining the age of 68 & 65 years respectively.
• Chairman of HSSC- Shri Bhopal Singh.

The correct answer is Haryana.

Key Points

• The Haryana government has appointed international wrestler Babita Phogat and Kabaddi player Kavita Devi as deputy directors in its Sports and Youth Affairs Department.
• They were appointed under the Haryana Outstanding Sportspersons (Recruitment and Conditions of Service) rules, 2018.
• As per the orders, both have to join the department within a month.

Additional Information

• Haryana:
  • Lok Sabha seats - 10.
  • Rajya Sabha seats - 5.
  • National Parks - Kalesar National Park, Sultanpur National Park.
  • Dams - Kaushalya Dam (Yamuna River), Ottu barrage (Ghaggar River), Anagpur Dam (Hakra River).

Given:

x + y + 1 = 0

Concept Used:

(a + b )³ = a³ + b³ + 3ab (a + b)

Calculations:

x + y + 1 = 0

⇒ x + y = -1

Cubing on both sides we get

(x + y)³ = ( -1 )³

⇒ x³ + y³ + 3xy( x + y ) = -1

⇒ x³ + y³ + 3xy ( -1) = -1

∵ x + y = -1

⇒ x³ + y³ - 3xy = -1

∴ required value = -1

The word that can be prefixed to make the following new words is ‘Mis’.

Mis + Interpret = Misinterpret

Mis + Behave = Misbehave

Mis + Understand = Misunderstand

Mis + Take = Mistake

The statement "Children actively construct their understanding of the world" was said by Piaget. Piaget saw the kid as constantly creating and re-creating his own model of reality, achieving mental growth by integrating simpler concepts into higher-level concepts at each stage. He argued for a “genetic epistemology,” a timetable established naturally for the event of the child’s ability to think, and he traced four stages therein development. Hence, the correct answer is, 'Piaget.'

Learning disability is a neurological disorder that impairs the ability to receive and process information. Today, more than ever, the need for instructors who are both capable and knowledgeable about teaching children with disabilities is critical.

The shape of the wave front in case of a light diverging from a point source is spherical and is shown in the given figure. The shape of the wavefront in case of a light emerging out of a convex lens when a point source is placed at its focus is a parallel grid.

The magnetic field is

= 5 × 10^–6 T

According to right hand palm rule, the magnetic field is directed  towards south.

Soft iron has high permeability and low retentivity and is used as an electromagnet. The area under the hysteresis loop for soft iron is less. So where the repeated cycles of magnetization occur, there on using soft iron core, energy losses are less. That is why soft iron is used in cores of transformers, galvanometers, generators, etc.

• A physical quantity is a physical property of a phenomenon, body, or substance, that can be quantified by measurement.
• A physical quantity can be expressed as the combination of a magnitude expressed by a number – usually a real number – and a unit.
• All these given above can be expressed as explained so these are physical quantity.

Plane mirror always forms a virtual image of the real object for all the rays emitted by the object. So, when a point source of light is placed in front of a  plane mirror, all the reflected rays meet at a point when produced backward.
Option A is correct.

Sensitivity of the potentiometer means the smallest potential difference it can measure. It can be increased by reducing the potential gradient. The same is possible by increasing the length of the potentiometer. Hence the correct option is option C.

Between two square faces the area is 0.01×0.01=1×10⁻⁴m² and length is 0.5m. So, the resistance is (3.5×10⁻⁵×0.5)/(1×10^-4)=0.175ohm, this can be written as, (35/2) x10^-2 ohm
Between the rectangular face the area is 0.01×0.5=0.005m² and the length is 0.01m, hence the resistance is (3.5×10⁻⁵×0.01)/0.005=7×10^-5 ohm

[E] = [F][d]
= [P/T][A]^½ 
[E] = P¹A^½T^-1

Here, r = 10 cm, q = 3.2 x 10^–7 C

A magnetic needle kept in non uniform magnetic field experience a force and torque due to unequal forces acting on poles.

When an object is still held it is the part of a system in which the train is moving, once it is left it still has the same velocity as the train for a person from ground. Thus as the velocity is horizontal and acceleration is vertical, it would follow a parabolic trajectory.

Mica capacitors are preferred for high frequency circuits because they have low ohmic losses and less reactance.

The fastest possible rate of rotation of a planet is that for which the gravitational force on material at the equator just barely provides the centripetal force needed for the rotation. Let M be the mass of the planet R its radius and m the mass of a particle on its surface. Then

T = ma,  F = 2T  

We know that density of Hg = 13600 kg/m.m.m
= 13600 x 1000 g / 100cm x 100cm x 100cm
= 13.6 g/cm.cm.cm

In hooke's law, the constant of proportionality defines  the modulus of elasticity which is also defined as the ratio of internal reforming force / external deforming force.

When the car moves in a curvature of radius R, the force acting towards the centre of curvature must be equal to mv²/R 
where m is mass of the car, v is the speed of car
But when we draw the free body diagram of the car the only force towards the centre of curvature is the friction force which is f = μmg
Hence by comparing we get v = √μgR
Substituting values gives, v= 20ms^-1

When a machine is lubricated with oil friction decreases. Hence the mechanical efficiency of the machine increases.

Mirage is formed by total internal reflection in deserts where due to heating of earth, refraction index of air near the surface of earth becomes lesser than above it.

Explanation:Alternating Current is the current in which the polarity of source continuously changes on a fixed frequency. So the positive and the negative terminals ‘alternate’

Newton’s law of cooling is to be used at temperatures around room temperature.