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Tambaya 1 Rahoto
A block of ice of mass 10kg at 0°C absorbs heat energy from its surroundings and changes to water at the same temperature. The heat absorbed is referred to as
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Tambaya 3 Rahoto
An air bubble of volume 4cm3 is formed 20m under water. What will be its volume when it rises to just below the surface of the water if the atmospheric pressure is equivalent to a height of 10cm of water?
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Tambaya 4 Rahoto
If the temperature of a resistance wire is gradually increased, its resistance will
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Tambaya 5 Rahoto
Which statement is NOT correct about Rutherford’s model of the atom?
Tambaya 6 Rahoto
Which device does NOT make use of the magnetic effects of an electric current?
Tambaya 7 Rahoto
A negatively charged rod is brought near the cap of an electroscope. The cap is earthed momentarily while the charge is near to it. The rod is then removed. Which statement is correct?
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Tambaya 8 Rahoto
An object 8cm in front of a plane mirror moves at a speed of 6cm s-1 away from the mirror. What will be the distance separating the object and the image after 2s?
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Tambaya 9 Rahoto
A body of mass 4 kg is accelerated from rest by a steady force of 9N. What is its speed when it has travelled a distance of 8m?
Tambaya 10 Rahoto
It is NOT possible to determine exactly and simultaneously the position and momentum of a particle. This statement is known as the
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Tambaya 11 Rahoto
What is the escape velocity of a satellite launched from the earth’s surface? (Take g as 10ms-2 and the radius of the earth as 6.4 × 106m)
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Tambaya 12 Rahoto
In an operating X-ray tube, a high p.d is applied between the cathode and the anode for the purpose of
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Tambaya 13 Rahoto
A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms-1]
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Tambaya 14 Rahoto
The ability of the eye to focus on objects at various distances is known as
Tambaya 15 Rahoto
The phenomenon of photoelectric effect is NOT used in
Tambaya 16 Rahoto
An a.c. generator can be converted into a d.c. generator by replacing
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Tambaya 17 Rahoto
When a current of 1 .0A flows in an electrolyte for 3.0h, a mass of 1 .0g is deposited. What mass will be deposited in 10.0h if a current of 3.0A flows through the electrolyte?
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Tambaya 18 Rahoto
A platinum-resistance thermometer has a resistance of 10 ω at 0°C and 18 ω at 100°C. Assuming that resistance changes uniformly with temperature, what is the resistance of the thermometer when the temperature is 45°C?
Tambaya 19 Rahoto
In which of the following are the substances arranged in descending order of their thermal conductivities?
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Tambaya 20 Rahoto
According to the Kinetic Theory, what does NOT occur when the temperature of a constant volume of gas is increased?
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Tambaya 21 Rahoto
The use of electrical fuses in domestic wiring is
Tambaya 22 Rahoto
An object weighing 0.60N is hung on a spiral spring and caused it to extend by 6.0cm. The object is removed and a black of wood replacing it causes the spring to extend by 10.0cm. What is the weight of the block of wood?
Tambaya 23 Rahoto
A brass cube of side 10cm is heated through 30°C. If the linear expansivity of brass is 2.0 × I0\(^{-5}\) K-1 , what is the increase in its volume?
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Tambaya 24 Rahoto
Which is a fundamental unit?
Tambaya 26 Rahoto
An electric heater takes 4A when operated on a 250V supply. What is the cost of the electricity consumed at 10k per kWh when the heater is used for 5 hours?
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Tambaya 27 Rahoto
An object is projected with a velocity of 50ms-1 from ground level at an angle θ to the vertical. If the total time of flight of the projectile is 5s, what is the value of θ? (g = 10ms-2)
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Tambaya 28 Rahoto
The wavelength of a stationary wave is 36.0cm. What is the distance between a node and the next anti-node?
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Tambaya 33 Rahoto
A body is uniformly accelerated from rest. Which of the following quantities vary/varies linearly with the square of the time?
I. Displacement
II. Velocity
III. Momentum
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Tambaya 34 Rahoto
Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element?
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Tambaya 36 Rahoto
Which of the following is/are TRUE of nuclear fission?
I. A heavy nucleus is split into two nuclei of comparable masses.
II. Two light nuclei are joined together to form a heavier nucleus.
III. The total mass of the products is less than that of the reactants.
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Tambaya 37 Rahoto
A body of mass M1 moving with a velocity U collides with a stationary body of mass M2 and both move with a common velocity V. If linear momentum is conserved, which expression correctly represents V?
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Tambaya 38 Rahoto
If the refractive index of water is 1.33, what is the critical angle for a water-air boundary?
Tambaya 39 Rahoto
The energy stored in a capacitor of capacitance 5 μF is 40J. What is the voltage applied across its terminals?
Tambaya 40 Rahoto
In which simple machine is the effort applied between the load and the fulcrum?
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Tambaya 41 Rahoto
A body executing a simple harmonic motion has an angular velocity of 22 radians per second. If it has a maximum
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Tambaya 43 Rahoto
If the size of the hole of a pinhole camera is increased, the image formed becomes
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Tambaya 44 Rahoto
A converging lens of focal length 5cm forms a virtual image which is 20cm from the lens. How far from the lens is the object?
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Tambaya 45 Rahoto
What part of the camera corresponds to the iris of the eye?
Tambaya 47 Rahoto
Which colour is deviated least when white light passes through a triangular prism?
Tambaya 48 Rahoto
A short response time is obtained in a liquid-in-glass thermometer when the
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