5 d) Two spherical rain drops of equal size are falling vertically through air with terminal velocity of 0.15 m . What would be terminal velocity if these two drops were to coalesce to form a large spherical drop?
5 c) In an A.C circuit, a resistor of resistance 1000 Ω and capacitor of capacitance 10 µF are connected in series with a source of 220 V and 50 Hz. Find the impedance of circuit and current flowing through circuit.
5.a) Two charges each of 10 -9 m are 8 cm apart in air. Find the magnitude of force exerted by these charges on third charge of 5x10 -11 C at a distance of 4 cm from each of charge. Given; K=9x10 9 Nm 2 C -2
5.b) A galvanometer has an internal resistance of 1Ω. It gives full scale deflection for a current of 50 mA. How this instrument can be converted into a voltmeter with a maximum range of 2.5 v.