नए गाड़ी पर A/F क्यों लिखा होता है?Why A/F new vehicle number plate? #shorts

A parallel plate vacuum capacitor with plate area A and separation x has charges +Q and -Q on its plates. The capacitor is disconnected from the source of charge, so the charge on each plate remains fixed. (a) What is the total energy stored in the capacitor? (b) The plates are pulled apart an additional distance dx. What is the change in the stored energy? (c) If F is the force with which the plates attract each other, then the change in the stored energy must equal the work dW = Fdx done in pulling the plates apart. Find an expression for F . (d) Explain why F is not equal to QE , where E is the electric field between the plates.

A beam of gas molecules is incident normally on a plate AB. Each gas molecule has mass m and velocity V. The incident beam falls on an area A on the plate and all the molecule strike the plate elastically. Number of molecules in unit volume of the beam is n. When the plate is moved to right (see fig.) a force F_(1) is needed to keep it moving with constant velocity u (gt V) . When the plate is moved to left with constant velocity u, an external force F_(2) is needed. Find F_(2) – F_(1) .

A person purchases 40 items at 10 each. He sells a part of them at 25% profit and the remaining at 10% loss. The net profit is 4% in this transaction. The number of items he sold at a loss, is: एक व्यक्ति 40 वस्तुओं में से प्रत्येक को 10 में खरीदता है। वह उसका एक हिस्सा 25% लाभ पर तथा शेष हिस्सा 10% हानि पर बेचता है। इस लेनदेन में शुद्ध 4% का लाभ होता है। उसने हानि पर कितनी वस्तुओं को बेचा?

A shopkeeper gains 400% on a transaction. If the cost increases by 100% and there is no change in the selling price, then find the ratio between new profit and selling price. किसी ट्रांसेक्शन पर एक दुकानदार लागत पर 400% मुनाफा कमाता है | यदि लागत 100% बढ़ जाती है और विक्रय मूल्य में परिवर्तन नहीं होता है, तो नए लाभ और विक्रय मूल्य के बीच का अनुपात है: