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Ibeere 1 Ìròyìn
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Ibeere 2 Ìròyìn
In the figure above,A lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 20m from the load. what minimum force F must be applied at the end of the lever [g = 10ms-2]
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Ibeere 3 Ìròyìn
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Ibeere 4 Ìròyìn
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Ibeere 5 Ìròyìn
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= 0.00067m3
volume of paraffin displaced = 12 x 0.00067
= 0.00034m3
mass of paraffin = 900 x 34 x 10-5
= 0.3kg
weight of paraffin = 0.3 x 10
= 3N = upthrust = tension in the string
Ibeere 6 Ìròyìn
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Ibeere 7 Ìròyìn
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Ibeere 8 Ìròyìn
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200 x c x (90 - θ )
θ = 70oC
Ibeere 9 Ìròyìn
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Ibeere 10 Ìròyìn
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Ibeere 11 Ìròyìn
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Ibeere 12 Ìròyìn
Two mirrors M1 and M2 are inclined at right angles as shown above calculate the angle of reflection of the ray of light at M2
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Ibeere 13 Ìròyìn
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Ibeere 14 Ìròyìn
If the focal length of a camera lens is 20cm, the distance from the film at which the lens must be set to produce a sharp image of an object 100cm away is
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Ibeere 15 Ìròyìn
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distance = velocity x time
= 3 x 108 x 4 x 10-3
= 6 x 105m
Ibeere 16 Ìròyìn
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error thickness = 30 - 20 = 10
error = 12 - 10 = 2mm that is, (11 ± 1)mm
%error = 111 x 1001
= 9%
Ibeere 18 Ìròyìn
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Ibeere 19 Ìròyìn
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Ibeere 21 Ìròyìn
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Ibeere 23 Ìròyìn
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Ibeere 25 Ìròyìn
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Ibeere 27 Ìròyìn
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Ibeere 28 Ìròyìn
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Ibeere 29 Ìròyìn
The diagram above shows a velocity time graph representing the motion of a car. Find the total distance covered during the acceleration and retardation of the motion
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Ibeere 30 Ìròyìn
A plane inclined at angle \( \theta \) has a velocity ratio of 10 : 1. The inclination of the plane to the horizontal is given by
Ibeere 31 Ìròyìn
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Ibeere 32 Ìròyìn
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Ibeere 33 Ìròyìn
A metal rod 800mm long is heated from 10oC to 95oC. If it expands by 1.36mm, the linear expansivity of the metal is
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Ibeere 34 Ìròyìn
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= 12 x 601
= 30cm
Ibeere 35 Ìròyìn
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Ibeere 36 Ìròyìn
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Ibeere 37 Ìròyìn
A 40-W instrument has a resistance of \(90\ \Omega\). On what voltage should it be operated normally?
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Ibeere 38 Ìròyìn
Ibeere 39 Ìròyìn
Ibeere 40 Ìròyìn
A parallel plate capacitor of area \(10\text{cm}^2\) in vacuum has a capacitance of \(10^{-2}\,\mu\text{F}\). What is the distance between the plates? \((e = 9 x 10^{-12}\text{fm})\)
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10-2 x 10-6 = 9×10−12d x 10-4
= 9 x 10-7m
Ibeere 41 Ìròyìn
Ibeere 42 Ìròyìn
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Ibeere 43 Ìròyìn
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