Hi Friends,

Even as I launch this today ( my 80th Birthday ), I realize that there is yet so much to say and do. There is just no time to look back, no time to wonder,"Will anyone read these pages?"

With regards,
Hemen Parekh
27 June 2013

Now as I approach my 90th birthday ( 27 June 2023 ) , I invite you to visit my Digital Avatar ( www.hemenparekh.ai ) – and continue chatting with me , even when I am no more here physically

Friday, 19 July 2024

RE: Interesting

 Kishan ,

 

Just a few minutes ago , I read a post by Sam Altman re this

 

Will we need to “ re-work “ our development ?

 

If it does not mean any delay in our target , pl switch over

 

Earlier you had indicated that each Mock Test might cost us 23 – 25 paise

 

What would it cost with GPT 4o-mini  ?

 

hcp

 

 

 

From: Kishan Kokal [mailto:kokalkishan.official@gmail.com]

 

 


Sent: 19 July 2024 12:08

 


To: Hemen Parekh

 

 


Subject: Interesting

 

OpenAI has introduced a new model, GPT-4o-mini, which is 60% more affordable and excels at generating questions.

https://openai.com/index/gpt-4o-mini-advancing-cost-efficient-intelligence/

e.g.
{
  "questions": {
    "questions": [
      {
        "question": "A point charge of +2 μC is placed at the origin. What is the electric field intensity at a point located 0.5 m along the positive x-axis?",
        "options": [
          "7200 N/C",
          "3600 N/C",
          "1800 N/C",
          "900 N/C"
        ],
        "answer": "A",
        "solution": "The electric field E due to a point charge Q at a distance r is given by the formula E = k * |Q| / r², where k = 9 × 10⁹ N m²/C². Here, Q = +2 × 10⁻⁶ C and r = 0.5 m. Therefore, E = (9 × 10⁹) * (2 × 10⁻⁶) / (0.5)² = 7200 N/C. Other options are incorrect due to incorrect calculations of E."
      },
      {
        "question": "A wire carries a current of 5 A. If the resistance of the wire is 2 ohms, what is the potential difference across it?",
        "options": [
          "10 V",
          "5 V",
          "2 V",
          "25 V"
        ],
        "answer": "A",
        "solution": "Using Ohm's Law, V = I * R, where I is the current and R is the resistance. Here, I = 5 A and R = 2 ohms. Therefore, V = 5 * 2 = 10 V. The other options come from incorrect applications of Ohm's Law."
      },
      {
        "question": "What is the wavelength of a light wave that has a frequency of 5 × 10¹⁴ Hz? (Use the speed of light c = 3 × 10⁸ m/s)",
        "options": [
          "0.6 μm",
          "0.5 μm",
          "0.4 μm",
          "0.3 μm"
        ],
        "answer": "B",
        "solution": "The wavelength λ can be calculated using the formula λ = c / f. Here, c = 3 × 10⁸ m/s and f = 5 × 10¹⁴ Hz. Thus, λ = (3 × 10⁸) / (5 × 10¹⁴) = 0.6 μm. Other options are incorrect due to miscalculations."
      },
      {
        "question": "A lens forms a real image twice the size of an object. If the object distance is 10 cm, what is the image distance?",
        "options": [
          "20 cm",
          "15 cm",
          "25 cm",
          "30 cm"
        ],
        "answer": "A",
        "solution": "Using the magnification formula m = -v/u, with m = 2 (real image) and u = -10 cm, we have 2 = -v / -10, leading to v = 20 cm. Other options are incorrect based on the application of the magnification formula."
      },
      {
        "question": "In a parallel plate capacitor, if the area of the plates is doubled while keeping the separation constant, how does the capacitance change?",
        "options": [
          "Doubles",
          "Halves",
          "Remains the same",
          "Increases by a factor of four"
        ],
        "answer": "A",
        "solution": "Capacitance C is given by C = ε₀ * A / d. If A is doubled and d remains constant, C will also double. Other options are incorrect as they misinterpret the relationship between area and capacitance."
      },
      {
        "question": "A particle moves in a circular path of radius 2 m with a constant speed of 4 m/s. What is the magnitude of the centripetal acceleration?",
        "options": [
          "8 m/s²",
          "4 m/s²",
          "2 m/s²",
          "16 m/s²"
        ],
        "answer": "A",
        "solution": "Centripetal acceleration a_c = v² / r. Here, v = 4 m/s and r = 2 m. Thus, a_c = (4)² / 2 = 8 m/s². Other options are incorrect due to miscalculations of acceleration."
      },
      {
        "question": "What is the work done by a force of 10 N acting on an object that moves 5 m in the direction of the force?",
        "options": [
          "50 J",
          "25 J",
          "10 J",
          "5 J"
        ],
        "answer": "A",
        "solution": "Work done W = F * d * cos(θ). Here, F = 10 N, d = 5 m, and θ = 0° (force in direction of displacement). Thus, W = 10 * 5 * 1 = 50 J. Other options are incorrect calculations of work."
      },
      {
        "question": "A 100 W bulb is used for 5 hours. How much energy does it consume in kWh?",
        "options": [
          "0.5 kWh",
          "1 kWh",
          "2 kWh",
          "0.25 kWh"
        ],
        "answer": "B",
        "solution": "Energy consumed (in kWh) = Power (kW) × Time (h). Here, 100 W = 0.1 kW and time = 5 hours. Thus, Energy = 0.1 * 5 = 0.5 kWh. Other options are incorrect due to misinterpretation of energy consumption."
      },
      {
        "question": "A wave is described by the equation y(x, t) = 0.1 sin(2π(0.01x - 50t)). What is the wave speed?",
        "options": [
          "100 m/s",
          "200 m/s",
          "50 m/s",
          "20 m/s"
        ],
        "answer": "A",
        "solution": "The wave speed v = fλ. Here, f = 50 Hz (from 50t) and λ = 2π / (0.01) = 200 m. Thus, v = 50 * 200 = 100 m/s. Other options are incorrect due to miscalculations of wave parameters."
      },
      {
        "question": "Which of the following principles is applied in the working of a transformer?",
        "options": [
          "Conservation of energy",
          "Faraday's law of electromagnetic induction",
          "Ohm's law",
          "Lenz's law"
        ],
        "answer": "B",
        "solution": "Transformers work on the principle of electromagnetic induction, specifically Faraday's law. Other options are incorrect as they relate to different concepts in physics."

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