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Perfect Tense Examples

Perfect tense falls under the four subcategories of tenses in English. Perfect tense talks about those actions that are already done/completed... View Article

Future Continuous Tense Examples

If you are given a worksheet to identify the future continuous tense, and you don’t know what future continuous tenses are, then would you be... View Article

19 Jan 2022: The Hindu Analysis

UPSC Current Affairs Preparation: The Hindu Analysis Watch expert analysis of ‘The Hindu’ dated 19 Jan 2022. Important news and views to boost... View Article

Past Continuous Tense Examples

Past continuous tense is one of the four types of past tense. This article will give you a list of past continuous tense examples to help you... View Article

19 Jan 2022: UPSC Exam Comprehensive News Analysis

CNA 19 Jan 2022:- Download PDF Here TABLE OF CONTENTS A. GS 1 Related B. GS 2 Related INTERNATIONAL RELATIONS 1. The Houthi attack on the United... View Article

18 Jan 2022: PIB Summary for UPSC

TABLE OF CONTENTS 1. Sustaining Food Production under Environmental Stress 2. BRICS STI Steering Committee 3. MoU between NCGG, GoI and... View Article

Sansad TV Perspective: Budget 2022-23: Investment and Fiscal Deficit

In the series Sansad TV Perspective, we bring you an analysis of the discussion featured on the insightful programme ‘Perspective’ on Sansad TV,... View Article

If an electron is moving with velocity [latex]vec{v}[/latex] produces a magnetic field [latex]vec{B}[/latex] , then

a) the direction of field b) the direction of field c) the direction of field d) the direction of field... View Article

The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm the potential energy stored in it is:-

a) 4U b) 8U c) 16U d) U/4 Answer: c) 16U Solution: Potential energy ∝ (extension)2 (U1/U2) = (x1/x2)2 (U1/U2) =... View Article

If a transparent medium of refractive index μ=1.5 and thickness t=2.5×10⁻⁵ m is inserted in front of one of the slits of Young’s double slit experiment, how much will be the shift in the interference pattern? The distance between the slits is 0.5 mm and that between slits and screen is 100 cm

a) 5 cm b) 2.5 cm c) 0.25 cm d) 0.1 cm Answer: b) 2.5 cm Solution: Shift in the fringe pattern x = (μ - 1)t.D/d = [(1.5 -... View Article

Biot-Savart law indicates that the moving electrons (velocity [latex]vec{v}[/latex]) produce a magnetic field [latex]vec{B}[/latex] such that:

a) b) c) it obeys inverse cube law d) it is along the line joining the electron and the point of observation... View Article

A constant voltage is applied to a series R−L circuit by closing the switch. The voltage across inductor (L=2H) is 20V at t=0 and drops to 5V at 20ms. The value of R in Ω

a) 100 In 2Ω b) 100(1- In2) Ω c) 100 In 4Ω d) 100((1- In4) Ω Answer: c) 100 In 4Ω... View Article

Electric field vector in a region is given by [latex]vec{E}=(3hat{i}+4yhat{j}) V/m [/latex]. The potential at the origin is zero. Then the potential at a point (2,1) m is

a) 7 V b) 8 V c) -8 V d) -7 V Answer: c) -8 V Solution: Ex = 3 Ey = 4y = - 3 x 2 - 2 x 1 = - 8 V... View Article

Two bodies are projected at angles θ and (90⁰−θ) to the horizontal with the same speed. The ratio of their times of flight is

a) sin θ: 1 b) cos θ: 1 c) sin θ: cos θ d) cos θ: sin θ Answer: c)... View Article

A coil of cross-sectional area A having n turns is placed in a uniform magnetic field B. When it is rotated with an angular velocity ω, the maximum e.m.f. induced in the coil will be

a) nBAω b) (3/2)nBAω c) 3nBAω d) (1/2)nBAω Answer: a) nBAω Solution: =nBAcosθ ω=θ/t ⇒θ=ωt...(1) ϕ=nBAcosωt Therefore, emf induced... View Article

If the coordinates of a variable point P be (a cosθ,b sinθ) where θ is a variable quantity , find the locus of P.

Solution: Given, Coordinates of a variable point P be (a cosθ,b sinθ) From this we get the x coordinate of the point to be... View Article

A wave of frequency 500 Hz travels between X and Y, a distance of 600 m in 2 sec. How many wavelength are there in distance XY?

a) 1000 b) 300 c) 180 d) 2000 Answer: a) 1000 Solution: Velocity, v = d/t = 600/2 = 300 m/s Wavelength, λ = v/f =... View Article

A particle is moving along positive X direction and is retarding uniformly. The particle crosses the origin at time t = 0 t=0 and crosses the point x = 4.0 m x=4.0m at t = 2 s t=2s.

(a) Find the maximum speed that the particle can possess at x = 0. (b) Find the maximum value of retardation that the particle can have... View Article

A ball falls from height h. After 1 s, another ball falls freely from a point 25m below the point from where the first ball falls. Both of them reach the ground at the same time. The value of h is

a) 11.2 m b) 21.2 m c) 31.2 m d) 41.2 m Answer: c) 31.2 m Solution: For the first ball, h = (1/2)gt2 -------(1) For the second ball, (h -... View Article

A luminous point object is moving along the principal axis of a concave mirror of focal length 12 cm towards it. When its distance from mirror is 20 cm its velocity is 4 cm/s. The velocity of the image in cm/s at that instant is:

a) 6, towards the mirror b) 6, away from the mirror c) 9, away from the mirror d) 9, towards the mirror Answer: c) 9, away from the... View Article