NCERT 2022 | मानव नेत्र तथा रंगबिरंगा संसार - L13 | CLASS 10 विज्ञान Ruchi Ma'am| 10 AM

Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, and pipe C alone can empty the full tank in x hours. All the pipes were opened together at 10.30 a.m., but C was closed at 2:30 p.m. If the tank was full at 8:30 p.m. on the same day, then what is the value of x ? पाइप A और B किसी टंकी को क्रमशः 16 और 24 घंटे में भर सकते हैं , तथा पाइप C अकेला भरी हुई टंकी को x घने में खाली कर सकता है | सभी पाइपों को सुबह 10 : 30 बजे एक साथ चालू किया गया, लेकिन 2 : 30 pm में C को बंद कर दिया गया | यदि टंकी उसी दिन 8 :30 pm में भर गई, तो x का मान ज्ञात करें |

Currrent flows through a constriction conductor. The diameter and current density in the left of connection are 2.0mm and 1.3 xx 10^(6)Am^(-2) (i) How much current flow through the constriction ? (ii) If the current density is tripled as it emerges from the right side of the constriction, what is the diameter of the hand is the diameter. of the right hand side of constriction?

I started on my bicycle at 7 a.m. to reach a certain place . After going a certain distance, my bicycle went out of order. Consequently, I rested for 35 minutes and came back to my house walking all the way. I reached my home at 1 p.m. If my cycling speed is 10 kmph and my walking speed is 1 kmph then on my bicycle I covered a distance of 4(61)/(66)k m b. 13 4/9k m c. 14 3/8k m d. 1(10)/(21)k m

Factorise the expressions. (i) ax^2 + bx (ii) 7p^2 + 21q^2 (iii) 2x^3 + 2xy^2 + 2xz^2 (iv) am^2 + bm^2 + bn^2 + an^2 (v) (lm + l) + m +1 (vi) y(y+z) + 9(y+z) (vii) 5y^2 - 20y - 8z + 2yz (viii) 10ab + 4a + 5b +2 (ix) 6xy - 4y + 6 - 9x

TimeFeb 27, 2018 10:42PMFeb 27, 2018 11.13:5PMFeb 27, 2018 1134:57PMFeb 28, 2018 1:5014 AFeb 28, 2018 62522 AM

A short bar magnet has a length 2l and a magnetic moment 10 Am^(2) . Find the magnetic field at a distance of z = 0.1m from its centre on the axial line. Here , l is negligible as comppared to z