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A block of mass m placed on an inclined plane of inclination 37 degree with horizontal. . What must be the frictional force between block and incline if the block is not to slide along the incline when the incline is accelerating to the right at 3 m/s^2 .
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A train STARTING FROM REST ACCELERATES UNIFORMLY FOR 100s ,RUNS AT A CONSTANT SPEED FOR 5MINUTES AND THEN COMES TO A STOP WITH UNIFORM RETARDATION IN THE NEXT 150 SECONDS. DURING THIS MOTION IT COVERS A DISTANCE OF 4.25 KM. FIND ITS CONSTANT SPEED,ACCELERATION AND RETARDATION.
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A conducting rod of length l moves with velocity v a direction parallel to a long wire carrying a steady current I. The axis of the rod is maintained perpendicular to the wire with near end a distance r away . Find the emf induced in the rod
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A rectangular coil of single turn, having area A, rotates in a uniform magnetic field B an angular velocity w about an axis is perpendicular to the field .If initially the plane of coil is perpendicular to the field,then the average induced e.m.f. when it has rotated through 90 degree is???a. wBA/pie b. wBA/2 pie c. wBA/4 pie d. 2wBA/ pie
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Please solve, In a decaying L-R circuit, the time after which energy stored in the inductor reduces to one forth of its initial value is?
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When a choke coil carrying a steady current is short circuited.The current in it decreases to b(<1) times its initial value in a time T . The time constant of the choke coil is (a) T/b (B) T/ ln (1/b (c) T/ ln b (d) T ln b
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let f(x)=x^3+ax^2+bx+5 sin^2x be an increasing function in the set of real numbers R.then a and b satisfiy the condition(a) a^2-3b-15 <&= o(b) a^2-3b+15 >&= o(c) a^2-3b+15 <&= o(d) a>0 and b> 0 (A)a^2_3b-
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THE POINT(S) ON THE CURVE Y^3+3X^2=12Y WHERE THE TANGENT IS VERTICAL,IS(ARE) ?
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if the rate of change in the circumference of a circle is 0.3 cm/sec, then the rate of change in the area of the circle when the radius is 5 cm is ?
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how can i insert figure in a question in goiit ??????????
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yaa its true....... good advic.
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Two heaters designed for the same voltage V have different power ratings. When connected individually across a source of voltage V ,they produced H amount of heat each in time t1, and t2, respectively .When used toghter across the same source , they produce H amount of heat in time t (a) if they r in series ,t = t1+t2(b) if they r in series ,t = 2(t1 + t2)(c) if they r in parallel ,t = (t1 x t2)/( t1 + t2)(d) if they r in parallel ,t = (t1 x t2)/2( t1 + t2)
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A charge q0 is distributed uniformly on a ring of radius R . A sphere of equal radius R is constructed with its centre on the circumference of the ring. Find the electric flux through the surface of the sphere ??
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