
a thin half ring of radius R=20cm is uniformly charged with total charge q=0.70nC. find the magnitude of the electric field strength at the carvature centre of the half ring. ...

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If the body covers onethird distance at speed v1, next one third at speed v2 and last one third at speed v3, then average speed will be a) frac{{{upsilon }_{1}},{{upsilon }_{2}}+{{upsilon }_{2}},{{upsilon }_{3}}+{{upsilon }_ ...

A car A is travelling on a straight level road with a uniform speed of 60 km/h. It is followed by another car B which is moving with a speed of 70 km/h. When the distance between them is 2.5 km, the car B is given a decelerat ...

A force of 40N acts on 4cm2. What is value of pressure in N/m2? a)105 b)104 c)103 d)106 ...

The circumference of the front wheel of a cart is 30 ft long and that of the back wheel is 36 ft long. What is the distance travelled by the cart, when the front wheel has done five more revolutions than the rear wheel? 750π ...

Why is the value of μ greater in sliding friction than rolling friction? ...

Can rolling friction be ever static? ...

Why is static friction more than kinetic friction? Advance thanks to the person who can help me. Thanks, Bye, Angikar ...

If diagonal and area of rectangle are 25 m and 168 , then what is the length of the rectangle? 17m 31m 12m 24m ...

A regular hexagon is inscribed in a circle of radius r cms. What is the perimeter of the regular hexagon? 3r 6r r√72 9r ...

3)Calculate the current in a wire if 900 C of charge passes through it in 10 minutes. 2A 5A 10A None of these Your Answer d Correct Answer b A=C/t HERE C=900C AND t= 10*60s THEREFORE A=900/600A =1.5A THEN HOW MY ANSWER IS WRO ...

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Q) One end of a horizontal thick wire of length 2L and radius 2R is welded to an end of another horizontal thin copper wire of length L and radius R.When the arrangement is stretched by applying forces at two ends, the ratio ...

Which of the following figures has the largest area? I. A circle of radius II. An equilateral triangle whose sides each have length 4 III. A triangle whose sides have lengths 3, 4 and 5 I II III I and III ...

How does a tornado form? ...

PV diagram of a diatomic gas is a straight line passing through origin. the molar heat capacity of the gas in the process will be (A) 4R (B) 25R (C) 3R (D) 4R/3 (*please show the working) ...

*Image* Calculate EQ capcitance . please solve ...

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A carrom board (having dimension 4ft * 4ft) has the queen at the centre. The striker hits the queen,which moves to the front edge,rebounds and finally enters the hole behind the striking line. Find the displacement of the que ...

*Image* What's the difference between (c) and (d)? ...

A charged drop of oil of radius 2.76μm and density 920kg/m3 is held stationary in a vertically downward electric field of 1.65*106N/C.(i).Find the magnitude and sign of the charge on the drop.(ii) If the drop captures two el ...

Using vectors prove that : *Image* the coordinates of C is (x1+x2,y1+y2) Given : the coordinates of A are (x2,y2) and the coordinates of B are (x1,y1) and OACB is a parallelogram (Y and X represent the coordinate axes) ...

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two point charges +4q and+q are placed at a distance L apart. a third charged particle is so placed that all the three charges are in equilibrium. find the location, magnitude and nature of third charge. ...

Two particles A and B each having a charge Q are placed ata a distance d apart.Where should a paricle of charge q be placed on the perpendicular bisector of AB so that it experinces maximum force?What is the magnitude of this ...

Two particles A and B each carrying a charge Q are held fixed with a separation d between them.A particle C having mass m and charge q is kept at the middle point of line AB(a)if it is displaced through a distance x perpendic ...

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