A solid ball of radius R has a charge density given by = for 0 ≤ r ≤ R. The electric field outside the ball is :
Due to heavy floods in a state, thousands were rendered homeless, 50 schools collectively offered to the state governments to provide the place and the canvas for 1500 tents to be fixed by the government and decided to share the whole expenditure equally The lower part of each tent is cylindrical of base radius 2.8m and height 3.5, with the conical upper part of the same base radius but of height 2.1m. If the canvas used to make the tents cost 120 per sq.m, find the amount shared by each school to set up the tents. what value is generated by the above problem?
In the circuit shown, find C if the effective capacitance of the whole circuit is to be 0.5 . All values in the circuit are in .
A man donates 10 aluminum buckets to an orphanage. A bucket made of aluminum is of height 20 cm and has its upper
and lowest ends of radius 36 cm and 21 cm respectively. Find the cost of preparing 10 buckets if the cost of aluminum sheet is
42 per 100 cm2. Write your comments on the act of the man.