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What is the magnitude of magnetic field at centre O of loop of radius √2 m made of uniform wire when a current of 1 A enters in the loop and taken out of it by two long wire as shown ...
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Q1: *Image* a)-1 b)loge1 c)1 d)none q2: *Image* a) 1/2 sin3a b) 1/2 cosec2a c)sin3a d)cosec3a q3: *Image* a)1 b)-1 c)0 d)none q4:if 0<x<y then *Image* a)e b)x c)y d)none q5: *Image* a)1 b) sinx/x c) x/sinx d)none ...
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tan-1(tan 7) = a:7-2Î b:2Î -7 c:7 Please give the reason behind the answer. ...
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1)If sin-1x + tan -1x = , then 2x2 + 1= 2)2 sin -1x = cos-1 (1 -2x2) is true for a. -1<=x<=1 b.-1<=x<=0 c.0<=x<=1 d.None of these 3)7)If sin-1x+sin-1y=2pi/3, cos-1x–cos-1y=pi/3, the number of ordered pairs ...
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The capacity of a parallel plate condenser is . If a dielectric of relative permitivity and thickness equal to one fourth the plate separation is placed between the plates, then its capacity becomes C. The value of will be a) ...
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Specify the coordination geometry around and hybridisation of N and B atoms in a 1:1 complex of BF3 and NH3 a)N :tetrahedral,sp3 ,B :tethedral,sp3 b)N :pyramidal,sp3 , B :pyramidal,sp3 c)N :pyramidal,sp3, B :planar,sp2 d)N :p ...
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Among the following structures, which is not a permissible resonance? *Image* *Image* *Image* 4.None of these ...
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lim [(1+x)^(1/x) -e]/x x→0 ...
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A spherical ball of mass m and radius r rolls without slipping on a rough concave surface of large radius R. It makes small oscillations about the lowest point. Find the time period. ...
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The maximum tension in the string of an oscillating pendulum is double of the minimum tension . Find the angular amplitude . ...
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which of the following sets of concurrent forces maybe in equilibrium a)3N,5N,9N b)3N,5N,1N c)3N,5N,15N d)3N,5N,6N ...
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A fireman wants to slide down a rope. The breaking load for the rope is 3/4 of the weight of the fireman. With what minimum acceleration should he slide down a)g b)3g/4 c) g/4 d)g/8 ...
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A body is projected with a speed u in such a direction that the maximum height obtained is equal to its horizontal range. The horizontal range is a)8u2/17g b)5u2/17g c)6u2/13g d)u2/2g ...
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A cannon ball is fired with a velocity v is an direction making an angle θ with the horizontal. At the highest point of its path it breaks into 2 parts of equal masses.One of the parts retraces the initial path of the ball.T ...
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2 balls of same mass are thrown horizontally from the top of a tower in the opposite direction with velocities 3m/s and 4m/s. The distance between the balls when their velocities are mutually perpendicular will be nearest to ...
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A point moves with uniform acceleration and v1,v2,v3 denote the average velocities in the 3 successive time intervals of time t1,t2,t3 . which of the following is true ? a)(v1-v2):(v2-v3)=(t1-t2):(t2+t3) b)(v1-v2):(v2-v3)=(t1 ...
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What is the the angle between P and the resultant of (P + Q)and (P-Q) ? ...
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The sum of two forces acting at a point is 16N. If the resultant force is 8N and its direction is perpendicular to minimum force then the forces are a)6N and 10N b)8N and 8N c)4N and 12N d)2N and 14N ...
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100 co-planar forces each equal to 10N act on a body. Each force makes an angle π/5 with the preceding force. What is the resultant ? ...
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which electronic level would allow the hydrogen atom to absorb a photon but not emit one ? a)3s b)2p c)2s d)1s ...
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In PCl5 the bond angles in equatorial and axial planes are a)60° and 120° b)120° and 90° c)120° and 60° d)120° and 180° what does "equatorial and axial planes" mean here ? ...
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An electron, a proton and an alpha particle have kinetic energies of 16E,4E and E respectively. What is the qualitative order of their de Broglie wavelengths ? a)Ie>Ip=Ia b)Ip=Ia>Ie c)Ip>Ie>Ia d)Ia<Ie>>Ip ...
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The value of the magnetic moment of a particular ion is 2.83 BM. The ion is a)Fe2+ b)Ni2+ c)Mn2+ d)Co3+ ...
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which of the following is the correct order of ionization energy 1. Be+>Be 2. Be>Be+ 3. C>Be 4. B>Be ...
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A body of mass M is kept in rest on an inclined plane of inclination angle ~ heta . Net force acting on it is: ...
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Condition for equilibrium: ...
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Mechanical advantage is ...
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Match the following: I)pulley    p)always changes direction of application of force II)class I lever q) vr always greater than 1 III) class II lever r) vr always less than 1 IV) class III lever s) lever ...
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If the {{p}^{th}},,{{q}^{th}}, and {{r}^{th}} term of an arithmetic sequence are a, b and c respectively, then the value of [a (q – r)+b(r – p)+ c (p – q)]= ...
