{"questions":[{"id":"inter-phy11-meas-01","v":1,"subject":"physics-11","chapter":"measurements","seed":true,"difficulty":1,"stem":"How many base units are there in the SI system?","options":["5","6","7","9"],"answer":2,"explain":{"en":"The SI has seven base units: metre, kilogram, second, ampere, kelvin, mole and candela. All other units (newton, joule, watt…) are derived from them.","ur":"ایس آئی نظام میں سات بنیادی اکائیاں ہیں: میٹر، کلوگرام، سیکنڈ، ایمپیئر، کیلون، مول اور کینڈیلا۔ باقی سب اکائیاں ان سے اخذ کی جاتی ہیں۔"},"source":{"kind":"parcha-original"},"status":"sample","exam":"inter"},{"id":"inter-phy11-meas-02","v":1,"subject":"physics-11","chapter":"measurements","difficulty":1,"stem":"Which of these is a base quantity?","options":["Force","Velocity","Energy","Mass"],"answer":3,"explain":{"en":"Mass (kilogram) is one of the seven base quantities. Force, velocity and energy are derived: for example, force is mass × acceleration.","ur":"ماس (کلوگرام) سات بنیادی مقداروں میں سے ہے۔ قوت، رفتار اور توانائی اخذ شدہ مقداریں ہیں، مثلاً قوت = ماس × اسراع۔"},"source":{"kind":"parcha-original"},"status":"sample","exam":"inter"},{"id":"inter-phy11-meas-03","v":1,"subject":"physics-11","chapter":"measurements","difficulty":2,"stem":"How many significant figures are there in 0.00450?","options":["2","3","5","6"],"answer":1,"explain":{"en":"Leading zeros only place the decimal point and are not significant. The 4, the 5 and the trailing zero after the decimal point are significant, giving 3.","ur":"شروع کے صفر صرف اعشاریہ کی جگہ بتاتے ہیں، اہم نہیں۔ 4، 5 اور اعشاریہ کے بعد آخری صفر اہم ہیں، یعنی 3 اہم ہندسے۔"},"source":{"kind":"parcha-original"},"status":"sample","exam":"inter"},{"id":"inter-phy11-meas-04","v":1,"subject":"physics-11","chapter":"measurements","difficulty":2,"stem":"The dimensions of force are:","options":["[MLT⁻²]","[MLT⁻¹]","[ML²T⁻²]","[MT⁻²]"],"answer":0,"explain":{"en":"Force = mass × acceleration = [M] × [LT⁻²] = [MLT⁻²]. [ML²T⁻²] is energy and [MLT⁻¹] is momentum.","ur":"قوت = ماس × اسراع = [M] × [LT⁻²] = [MLT⁻²]۔ [ML²T⁻²] توانائی اور [MLT⁻¹] مومینٹم کی ڈائمینشن ہے۔"},"source":{"kind":"parcha-original"},"status":"sample","exam":"inter"},{"id":"inter-phy11-meas-05","v":1,"subject":"physics-11","chapter":"measurements","difficulty":1,"stem":"The prefix \"nano\" stands for:","options":["10⁻⁶","10⁻¹²","10⁹","10⁻⁹"],"answer":3,"explain":{"en":"Nano (n) = 10⁻⁹. Micro (μ) = 10⁻⁶, pico (p) = 10⁻¹², and giga (G) = 10⁹.","ur":"نینو (n) = 10⁻⁹۔ مائیکرو (μ) = 10⁻⁶، پیکو (p) = 10⁻¹² اور گیگا (G) = 10⁹۔"},"source":{"kind":"parcha-original"},"status":"sample","exam":"inter"},{"id":"inter-phy11-meas-06","v":1,"subject":"physics-11","chapter":"measurements","difficulty":2,"stem":"A length is measured as 2.0 ± 0.1 cm. The percentage uncertainty is:","options":["0.1%","2%","5%","10%"],"answer":2,"explain":{"en":"Percentage uncertainty = (absolute uncertainty ÷ measured value) × 100 = (0.1 ÷ 2.0) × 100 = 5%.","ur":"فیصد غیر یقینی = (مطلق غیر یقینی ÷ ناپی گئی قیمت) × 100 = (0.1 ÷ 2.0) × 100 = 5%۔"},"source":{"kind":"parcha-original"},"status":"sample","exam":"inter"}]}