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The correct answer is +1.75 D.

Key Points

• The power of a lens is measured in diopters (D).
• The power of a combination of lenses is equal to the algebraic sum of the powers of the individual lenses.
• Given lens powers: +2.0 D and -0.25 D.
• To find the equivalent power, add the powers of the two lenses:
• +2.0 D + (-0.25 D) = +1.75 D.
• Thus, the combination of these two lenses is equivalent to a single lens of power +1.75 D.

 Additional Information

• Lens Power
• Diopter (D) is the unit of measurement for the optical power of a lens.
• A lens with a power of +1 diopter brings parallel rays of light to focus at 1 meter.
• The power of a lens is the reciprocal of its focal length in meters (P = 1/f).
• Positive power indicates a converging lens, while negative power indicates a diverging lens.
• Combination of Lenses
• When lenses are combined, their individual powers add algebraically.
• This is useful in optical instruments like microscopes and telescopes.
• It is important to consider the sign of the power for accurate calculations.

The correct answer is option 1

Key Points

• Van Vihar National Park is situated along the banks of Upper Lake (Bada Talab) in Bhopal, offering a scenic natural habitat for wildlife.
• Upper Lake is the largest artificial lake in Madhya Pradesh, providing water supply and ecological balance to the city.
• Unlike traditional national parks, Van Vihar is managed by the Madhya Pradesh Forest Department, focusing on wildlife rehabilitation and conservation education.
• The park follows Central Zoo Authority guidelines for captive animals but is not classified as a traditional wildlife sanctuary.

Given:

SP = Rs.512

MP = Rs.800

Calculation:

⇒ 512 = 800 × (100 - ? /100)

⇒ ? = 36%

Single discount = 36%

Let two equal discounts be a%.

⇒ 36 = (a + a - a²/100)

⇒ a² - 200a + 3600 = 0

⇒ a² - 180a - 20a + 3600 = 0

⇒ a(a - 180) - 20(a - 180) = 0

a = 180% or a = 20%

∴ % discount offered is 20%.

Shortcut Trick

According to the question, M.P = 800 and S.P = 512

Now, M.P : S.P = 800 : 512 = 400 : 256

Here, two equal successive discounts have given,

So, after one discount the ratio becomes,

⇒ M.P : S.P = √400 : √256

⇒ M.P : S.P = 20 : 16

Now, discount% is (20 - 16)/20 × 100 = 20%

The correct answer is Option 2: Place an ice pack and elevate it.

• Qualities Projected in this situation:  (Speed of decision and effective intelligence).

Key Points

• Checklist for attempting SRT questions:

1. Read the question and options carefully.
2. Look for options that are realistic, optimistic, and reflect officer-like qualities.
3. Do not skip any situation.
4. Relegate the negative sentences and choose the most logical option among the remaining. As time is an important factor, hence your thinking ability should be swift.
5. React quickly and be logical.

Additional Information

Officer qualities:

The correct option is generator. 

Key Points

Generator:

• An electric generator is a device that is used to convert mechanical energy into electric energy.
• It is also known as a dynamo.
• An electric generator works on the Electromagnetic Induction Principle.
• The Principle of Electromagnetic Induction states that when a conductor is connected with a changing flux, it will induce an emf across it. The value of induced emf across the conductor depends on the rate of change of flux connected with the conductor.

Additional Information

• A voltmeter is an instrument used for measuring the electric potential difference between two points in an electric circuit. It is connected in parallel
• An ammeter, is an instrument for measuring either direct or alternating electric current, in amperes.
• An electric motor is a device in which electrical energy is converted into mechanical energy

The correct answer is option 2

Key Points

• A new Head Post Office is being constructed in Ashoknagar at a cost of ₹2.1 crore.
• It aims to provide modernized postal services with automated parcel sorting, biometric authentication, and ATMs.
• The modernization of post offices aligns with the Digital India initiative, focusing on technology-enabled postal services to improve accessibility.
• The Post Office Act of 2023 replaced the 1898 Act, enhancing India Post’s service efficiency and outreach.

Given:

Total number of vote = 640000

Invalid vote = 20%

X got overall valid vote = 70%

Concept used:

Percentage base question

If a% of b so = b × (a/100)

Calculation:

We will find the invalid vote

20% of 640000

⇒ 640000 × (20/100)

⇒ 12800

Valid vote = 640000 – 128000 = 512000

Candidate X got 70% of the overall valid vote

⇒ 512000 × (70/100)

⇒ 358400

∴The number of valid votes polled in favor of the candidate is 358400.

Given that:-

• Box M is placed above box N.

• Box O is placed below box K.

• Box L is placed below O.

• Box N is placed above K.

• After combining the statements:-

• Thus, L is the bottom-most box.

Hence, "option 2" is the correct answer.

The correct answer is Option 4.

Key Points

• The cell wall is the outer covering of a cell. It surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.
• The cell wall is present in plant cells and absent in animal cells. Hence, the correct answer is Option 4.

Additional Information

• The plasma membrane (also called the cell membrane) is the membrane found in all cells that separates the interior of the cell from the outside environment.
• In bacterial and plant cells, a cell wall is attached to the plasma membrane on its outside surface.
• The plasma membrane is present in both plant cells and animal cells.
• A vacuole is a membrane-bound cell organelle.
• In animal cells, vacuoles are generally small and help sequester waste products.
• In plant cells, vacuoles help maintain water balance.

The correct answer is ​Police Army Recruitment Training and Hunar.

In News

• Madhya Pradesh Launches PARTH Yojana Initiative

Key Points

• PARTH Yojana is aimed at empowering youth for careers in defence and law enforcement by enhancing their physical and mental preparedness.
• The initiative provides structured training in physical fitness, written exam coaching, and personality development for candidates aspiring to join the Indian Army, police, and paramilitary forces.
• Training centres will be set up at divisional levels across Madhya Pradesh, with district officers overseeing their implementation.
• The scheme is led by Chief Minister Mohan Yadav, with Vishwas Sarang serving as the Minister of Sports and Youth Welfare.