CG PET case studies
CG PET · Put your knowledge to work in context.
CG PET (Chhattisgarh Pre-Engineering Test) is the state-level entrance examination used for admission to undergraduate engineering programmes - principally B.E./B.Tech - in participating institutions in Chhattisgarh. It is aimed at candidates who have completed or are completing Class 12 with Physics, Chemistry and Mathematics, and who want to compete for seats through a state route rather than a national one. The CG PET case studies are 5 cases and about 3,530 words.
1Block on a Rough Incline: Is the Spring Balance Faulty?
A 4.0 kg block rests on a plane inclined at 30° to the horizontal. The coefficients of friction between block and plane are μs = 0.50 and μk = 0.40.
730 words, about 4 min2Potentiometer With No Balance Point
A potentiometer is wired with a 10.0 m uniform resistance wire, a driver cell of emf 2.0 V and negligible internal resistance, and a standard cell of emf 1.20 V used for calibration. With the standard cell in the circuit and the galvanometer key closed, the balance point is at 6.00 m measured from the end where the driver cell is connected.
799 words, about 4 min3Buffer Capacity After a Strong-Acid Addition
A 1.00 L aqueous solution at 25 °C contains 0.100 mol of acetic acid (pKa = 4.74) and 0.100 mol of sodium acetate. A technician adds 10.0 mL of 2.00 M HCl with stirring and records the pH before and after.
679 words, about 3 min4Galvanic Cell: Concentration Effects and the Cost of a Discharge
A student builds the cell Zn(s) Zn²⁺(0.10 M) Cu²⁺(0.010 M) Cu(s) at 298 K, using 100 mL of each solution and a saturated KNO₃ salt bridge. Standard electrode potentials are E°(Zn²⁺/Zn) = −0.76 V and E°(Cu²⁺/Cu) = +0.34 V.
718 words, about 4 min5Area Under a Curve That Crosses the Axis
A student is asked to find the area of the region enclosed between the curve y = x² − 4x + 3 and the x-axis for 0 ≤ x ≤ 4. She evaluates ∫₀⁴ (x² − 4x + 3) dx, obtains 4/3, and submits this as the area.
604 words, about 3 min