PNB Physics (EM) — Class 10 Punjab Board book
Official Punjab Curriculum and Textbook Board (PCTB) Physics textbook for Class 10 (English Medium). Neeche poori kitab online parhein ya official PDF download karein — bilkul muft.
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Is kitab ke baare mein
This is the English-medium practical notebook for class-10 Physics, covering chapters 12, 14, 15 and 16. It begins with geometrical optics — refraction through glass slabs and prisms, critical angle, and focal length by the parallax method — then moves to current electricity with Ohm's law verification and series/parallel resistor circuits. The final chapters map magnetic fields and introduce digital electronics through logic gates.
The standout experiment is 16.2: building a working burglar or fire alarm from logic gates, which turns abstract truth tables into something that buzzes. For optics, the ray diagrams must be drawn with a sharp pencil and labelled completely — examiners deduct marks for untidy or incomplete ray tracing more than for any other mistake.
Aham mozuaat
Chapter 12: Geometrical Optics
Page 3
Chapter 14: Current Electricity
Page 30
Chapter 15: Electromagnetism
Page 46
Chapter 16: Introductory Electronics
Page 52
Ustad ka mashwara
Physics practicals reward the careful, not the clever. Draw big, label everything, and write readings in the observation table before you do any calculation. And in the viva, if you can explain WHY the ray bends, you already know more than the student who just memorised the steps.
— Rehman Ahmad Chaudhary, Head Teacher, GPS 117 DB(BJ), Yazman
Aksar pooche gaye sawalat
How do I verify the laws of refraction in experiment 12.1?
Fix the glass slab on white paper, trace incident and emergent rays with pins, and measure the angles of incidence and refraction. Snell's law should hold: the ratio sin(i)/sin(r) stays constant for the glass. Draw the ray diagram large and label every angle.
What is the correct circuit for verifying Ohm's law?
Connect the wire in series with a battery, ammeter and rheostat, and a voltmeter across the wire. Vary the current with the rheostat and record V and I. Plot V against I — a straight line through the origin verifies Ohm's law, and its slope is the resistance.
How do I trace a magnetic field with a bar magnet?
Take a bar magnet, place it on paper, and use a compass needle to mark the direction at successive points around it. Join the marks to trace the field lines — they emerge from the north pole and enter the south pole, never crossing each other.
How does the burglar alarm experiment work?
Use the truth tables from experiment 16.1 to pick the right gate (e.g. an OR gate triggers if either sensor fires), then wire the gate's output to a buzzer. Test each input combination against the truth table before calling it done.
Class 10 ki mazeed kitabein
Disclaimer
Ye kitab Punjab Curriculum and Textbook Board (PCTB) ki official publication hai. Download aur online reading PECTAA ki official e-books listing (pectaa.edu.pk) se faraham ki jati hai — sirf talimi maqsad ke liye. Malkiyat PCTB ki hai; is site ka koi dawa nahi.