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Tambaya 1 Rahoto
Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is
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Tambaya 2 Rahoto
Arrange the following in the order of their increasing frequency.
I. Visible light
II. Gamma rays
III. Radio waves
IV. Infra-red radiation
V. Ultra-violet radiation
Tambaya 5 Rahoto
An immersion heater is rated 1500W. How long does it take the heater to raise the temperature of 1 kg of water by 30°C? (Assume heat lost to the surrounding is negligible, Specific heat capacity of water 4200Jkg-1K-1)
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Tambaya 6 Rahoto
Which of the following statements is correct about light and sound waves? Both
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Tambaya 7 Rahoto
The space between the two walls of a vacuum flask is completely evacuated to reduce heat loss by
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Tambaya 10 Rahoto
The defect of the eye lens which occurs as a result of weak ciliary muscles is called
Tambaya 11 Rahoto
An effort P applied at one end of a crowbar just overcomes the resistance W at the lid of a tin. The mechanical advantage of the crowbar is expressed as
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Tambaya 12 Rahoto
Two forces of magnitude 8N and 4N act at right angle to each other. The angle between the resultant and the 8N force is
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Tambaya 13 Rahoto
Two images Y and X are formed by a plane mirror and a convex mirror respectively. Which of the following is correct about their characteristics?
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Tambaya 14 Rahoto
Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg-1 . Specific heat capacity of water 4.2Jg-1 K-1]
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Tambaya 15 Rahoto
A body executing simple harmonic motion has an angular speed of 2π radians. Its period of oscillation is (π 3.14).
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Tambaya 16 Rahoto
Determine the value of x from the nuclear reaction below,
\(^{222}_{86}Rn\) → \(^{x}_{88}Ra\) + 2β + energy
Tambaya 17 Rahoto
Which of the following pairs of musical instruments produce sound due to the vibration of air column?
Tambaya 18 Rahoto
Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V.
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Tambaya 19 Rahoto
Inertia is the property of a body which makes the body to
Tambaya 20 Rahoto
Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane?
Tambaya 21 Rahoto
A ball of mass 100g falls from a height of 5m onto a concrete floor and rebounds to a height of 3m. Calculate the energy lost. (g = 10ms-2)
Tambaya 22 Rahoto
Which of the following substances undergoes sublimation?
Tambaya 23 Rahoto
A stone is thrown with a speed of 10ms at an angle of 30° to the horizontal, Calculate its time of flight, (g = 10ms2)
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Tambaya 25 Rahoto
The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth?
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Tambaya 26 Rahoto
A ball of mass 0.1kg moving with velocity of 20ms-1 is hit by a force which acts on it for 0.02s. If the ball moves off in the opposite direction with a velocity of 25ms-1 , calculate the magnitude of the force.
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Tambaya 28 Rahoto
A plane progressive wave is represented by the equation y = 0.2sin (200πt - 0.5.x) where x and y are measured in cm and t in s. What is the frequency of the wave?
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Tambaya 29 Rahoto
Which of the following statements about the pressure in a liquid is NOT correct? It
Tambaya 30 Rahoto
The electric potential at a distance d from a point charge q in air of permittivity eo is expressed as?
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Tambaya 31 Rahoto
A projectile attains its maximum height when the angle of projection is
Tambaya 32 Rahoto
An observer heard the sound of thunder 5.8s after the lightning flash was seen. How far was he from the source? [Speed of sound in air = 330ms-1]
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Tambaya 34 Rahoto
The work done in extending a spring by 40 mm is 1.52J. Calculate the elastic constant of the spring.
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Tambaya 35 Rahoto
A transformer has an efficiency of 92.5%. the ratio number of turns in the primary coil to that in the secondary coil is 128 : 45. If the current passing through the secondary coil is 9.0A, calculate the current passing through the primary-coil.
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Tambaya 36 Rahoto
Which of the following pairs of phenomena helps in the resolution of the wave-particle paradox of matter?
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Tambaya 38 Rahoto
The phenomenon of photoelectric effect is used in the following EXCEPT
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Tambaya 39 Rahoto
Which of the following cells does not require a dipolar for effective and efficient delivery of current?
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Tambaya 40 Rahoto
The equation PxVyTz = Constant is Charles’ law if
Tambaya 41 Rahoto
A sound wave from a ship is received 8.4s later. What is the depth of the sea? [Speed of sound in water 1500ms-1]
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Tambaya 43 Rahoto
Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then
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Tambaya 45 Rahoto
An object of mass 2kg moves for 5s with a uniform velocity of 10ms. What is the magnitude of its acceleration in ms-2
?
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