A man invested a sum of money at compound interest. It amounted to Rs. 2420 in 2 years and to Rs. 2662 in 3 years. Find the sum.
R% = (2662 - 2420)/2420 x 100 = 242/2420 x 100 = 10% 2 years CI % = 10 + 10 + 100/100 = 21% So, 121% = 2420 100% = 2000
The colour of sky appears blue due to –
Water flows in a horizontal pipe of non-uniform area of cross-section at a pressure difference of 1.6 cm of mercury. If the velocity of water at the la...
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves:
A spherical black body with a radius of 8 cm radiates 450-watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated...
A copper block of mass 3 kg is heated in a furnace to a temperature of 450°C and then placed on a large ice block. Find the maximum amount of ice that...
An electric dipole when held at 30 ֯ with respect to a uniform electric field of 103 N/c experience a torque of 12 × 10-26 Nm. C...
Tungsten is used for the manufacture of the filament of an electric bulb, because –