27 October 2021 | Daily Current Affairs For All Exams By Gaurav Sir

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

Read the data given below and answer the questions based on it. In the CBSE Board exams last year, 53% passed in Biology, 61% passed in English, 60% in Social Studies, 24% in Biology and English, 35% in English and Social studies, 27% in Biology and Social Studies, and 5% in none. What is the percentage of students who passed in all subjects ?

The neutron is a particle with zero charge still it has a non-zero magnetic moment with z-component 9.66 xx 10^(-27) A-m^(2) . This can be explained by the internal structure of the neutron. The evidence indicates that a neutron is composed of three fundamental particles calleed quarks : an "up" (u) quark, of charge + (2e)/(3) , and two "down" (d) quarks, each of change - (e)/(3) . The combinations of the three quarks prodcues a net charge of (2e)/(3) - e/3 - e/3 = 0 . If the quarks are in motion they can produce a non-zero magnetic moment. As a very simple model, suppose the u quark moves in a counter clockwise circular path and the d quarks move in a clockwise circular path, all of the radius r and all with the same speed v see figure. The current due to the circular motion of the u quark :-

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).

The phenomenon of generating current/e.m.f. in a circuit by changing magnetic field linked with the circuit is called electromagnetic induction (EMI). In our daily lives, we use (EMI) in many ways without even realiaing it. Read the above passage and answer the following question : (i) What is the most universal application of EMI ? (ii) How is the phenomenon being used to enhance the safety of all our important establishments ?