An electron (mass=9.1×10−31kg) is sent into an electric field of intensity 9.1×106 N/C. The acceleration produced is
a) 1.6 x 1018 m/s2 b) 1.6 x 106 m/s2 c) 1.6 x 10-18 m/s2 d) 1.6 x 10-6 m/s2 Answer: a) 1.6 x 1018... View Article
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A transformer of frequency 60 Hz and 120 V input has an 8:1 turn ratio. The frequency of the output is
a) 40 Hz b) 480 Hz c) 2 Hz d) 60 Hz Answer: d) 60 Hz Solution: The output frequency is... View Article
The ratio of time periods of α-particle and proton moving on a circular path in a uniform magnetic field is ___________.
a) 1: 2 b) 2: 1 c) 4: 1 d) 1: 4 Answer: b) 2: 1 Solution: The time period of... View Article
An object falls from the top of a building that is 25 m high. Air resistance is negligible What is the speed of the object when it hits the ground?
A) 10 m/s B) 22 mis C) 25 m/s D) 625 m/s Answer: B) 22 m/s Solution: From the question:... View Article
24 Dec 2021: UPSC Exam Comprehensive News Analysis
CNA 24 Dec 2021:- Download PDF Here TABLE OF CONTENTS A. GS 1 Related B. GS 2 Related POLITY 1.... View Article
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TABLE OF CONTENTS 1. Transient High Energy Pulses 2. Fifth Siddha Day 3. Conformity Assessment Scheme 1. Transient High Energy... View Article
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The difference between successor and predecessor of any number is,
(a) 0 (b) 1 (c) 2 (d) None of these Solution: Let x be a number. Then successor is x+1.... View Article
If α, β are roots of the equation 2x2 – 35x + 2 = 0, then the value of (2α-35)3 × (2β-35)3 is equal to
(a) 10 (b) 100 (c) 64 (d) 1 Solution: 2x2 – 35x + 2 = 0 Sum of roots, α... View Article
What is 30 percent of 90?
(a) 30 (b) 15 (c) 27 (d) 45 Solution: 30 percent of 90 = (30/100)×90 = 2700/100 = 27 Hence... View Article
If cos A + cos B= 4 sin2(C/2) then prove that sides a, c, b of an triangle ABC in A.P.
Solution: Given cos A + cos B = 4 sin2(C/2) => 2cos (A+B)/2 cos (A-B)/2 = 4 sin2(C/2) Sum of... View Article
Find the value of k for which the following system of linear equations has infinite solutions: x + (k+1)y = 5, (k+1)x + 9y = 8k-1
(a) 3 (b) 1 (c) 2 (d) 4 Solution: x + (k+1)y = 5 ..(i) (k+1)x + 9y = 8k-1... View Article
What is the equation of a line, in general form, with a point (-3, 0) and an undefined slope?
(a) x + 3 = 0 (b) y + 3 = 0 (c) x – 3 = 0 (d) y... View Article
If x3+1 is divided by x2+ 5, then the possible degree of quotient is
(a) 0 (b) 1 (c) 2 (d) none of these Solution: Given dividend is x3+1. Divisor is x2+5. First we... View Article
