14 December 2021 | Daily Current Affairs for All Exams | Gaurav Chaudhary Sir

Daily Current Affairs 11 Feb 2020 | SSC-CGL, RBI, NDA, SBI, IBPS, Railways, UPSC

An electric current of 8 A is made to flow through a room heater of resistance 30 omega . Calculate (1) the potential difference across the heater. (2) the power supplied to the heater. (3) the amount of heat energy liberated from it in one minute. (4) If the heater is used for 10 hours daily in the months of December, then find the num ber of units of electrical energy consumed by it.

In a house there are ten 60-watt lamps. Three 40-watt flourorescent tubes and three 40-watt fans. When all these are switched on what is the current drawn from the mains if the supply voltage is 220V? Calculate the power drawn and the cost for using them for 6hours daily in a month of 30 days.( 1 B.O.T. unit costs 30 pasise).

From some instruments current measured is I=10.0amp , potential different measured is V=100.0 V , length of wire is 31.4 cm , and diameter of wire is 2.00mm (all in correct significant figure). The resistivity of wire (in correct significant figures)will be (use pi=3.14 )

In an experiment, current measured is, 1 = 10.0 A , potential difference measured is V = 100.0 C , length of the wire is 31.4 cm and the diameter of the wire 2.00 mm (all in correct significant figures). Find resistivity of the wire in correct significant figures. [Take pi = 3.14 , exact]. (a) (b) (c) (d) .

An aqueous solution containing Na^(+),Sn^(2+),Cl^(-) " & " SO_(4)^(2-) ions, all at unit concentration, is electrolysed between a silver anode and a platinum cathode. What changes occur at the electrodes when current is passed through the cell ? Given : E_(Ag^(+)|Ag)^(0)=0.799 V E_(Sn^(2+)|Sn)^(@)=-0.14V, E_(Cl_(2)|Cl^(-))^(@)=1.36 V, E_(S_(2)O_(8)^(2-)|SO_(4)^(2-))^(@)=2V, E_(Sn^(4+)|Sn^(2+))^(@)=0.13V

The cathode its 8 xx 10^(14) electrons per second, when heated. When 400 V is applied to anode all the emitted electrons reach the anode. The charge on electron is 1.6 xx 10^(-19)C . The maximum anode current is