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Ibeere 1 Ìròyìn
What part of the camera corresponds to the iris of the eye?
Ibeere 2 Ìròyìn
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?
Awọn alaye Idahun
Ibeere 3 Ìròyìn
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
Awọn alaye Idahun
Ibeere 4 Ìròyìn
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]
Awọn alaye Idahun
Ibeere 5 Ìròyìn
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?
Awọn alaye Idahun
Ibeere 6 Ìròyìn
The energy stored in a capacitor of capacitance 5 μF is 40J. What is the voltage applied across its terminals?
Awọn alaye Idahun
Ibeere 7 Ìròyìn
Which statement is NOT correct about Rutherford’s model of the atom?
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Ibeere 8 Ìròyìn
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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Ibeere 9 Ìròyìn
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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Ibeere 10 Ìròyìn
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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Ibeere 11 Ìròyìn
If the temperature of a resistance wire is gradually increased, its resistance will
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Ibeere 12 Ìròyìn
The ability of the eye to focus on objects at various distances is known as
Awọn alaye Idahun
Ibeere 13 Ìròyìn
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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Ibeere 14 Ìròyìn
If the refractive index of water is 1.33, what is the critical angle for a water-air boundary?
Ibeere 15 Ìròyìn
In which simple machine is the effort applied between the load and the fulcrum?
Awọn alaye Idahun
Ibeere 18 Ìròyìn
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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Ibeere 19 Ìròyìn
If the size of the hole of a pinhole camera is increased, the image formed becomes
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Ibeere 20 Ìròyìn
An a.c. generator can be converted into a d.c. generator by replacing
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Ibeere 22 Ìròyìn
According to the Kinetic Theory, what does NOT occur when the temperature of a constant volume of gas is increased?
Awọn alaye Idahun
Ibeere 23 Ìròyìn
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)
Awọn alaye Idahun
Ibeere 25 Ìròyìn
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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Ibeere 27 Ìròyìn
Which device does NOT make use of the magnetic effects of an electric current?
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Ibeere 28 Ìròyìn
A short response time is obtained in a liquid-in-glass thermometer when the
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Ibeere 29 Ìròyìn
The silvered walls of a vacuum flask minimise loss of heat due to
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Ibeere 30 Ìròyìn
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?
Awọn alaye Idahun
Ibeere 32 Ìròyìn
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?
Awọn alaye Idahun
Ibeere 33 Ìròyìn
Which colour is deviated least when white light passes through a triangular prism?
Ibeere 34 Ìròyìn
In which of the following are the substances arranged in descending order of their thermal conductivities?
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Ibeere 36 Ìròyìn
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?
Awọn alaye Idahun
Ibeere 38 Ìròyìn
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?
Awọn alaye Idahun
Ibeere 39 Ìròyìn
The use of electrical fuses in domestic wiring is
Ibeere 40 Ìròyìn
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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Ibeere 41 Ìròyìn
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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Ibeere 42 Ìròyìn
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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Ibeere 43 Ìròyìn
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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Ibeere 44 Ìròyìn
Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element?
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Ibeere 45 Ìròyìn
Which process will increase the rate of oscillation of a pendulum?
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Ibeere 47 Ìròyìn
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?
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Ibeere 48 Ìròyìn
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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