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Ibeere 1 Ìròyìn
The space surrounding a magnet in which the magnetic force is exerted is
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Ibeere 3 Ìròyìn
Which of the following statement(s) is/are correct about the isotopes of an elements? They have the same
I. chemical properties
II. nucleon number
III proton number
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Ibeere 6 Ìròyìn
The mode of transference of heat which does not require any material medium is
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Ibeere 8 Ìròyìn
Which of the following instruments can be used to measure e.m.f. most accurately.
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Ibeere 9 Ìròyìn
The volume of a given mass of gas is 40cm3 at 27° C. What is its volume at 90° C if its pressure remains constant?
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Ibeere 10 Ìròyìn
The distance between two successive crests of a water wave is 0.5m. If a particle on the surface of the water wave makes two complete vertical oscillations in 1s, calculate the speed of the wave.
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Ibeere 11 Ìròyìn
A constant force of 5N acts for 5s on a mass of 5kg initially at rest. Calculate the final momentum of the mass.
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Ibeere 12 Ìròyìn
Young’s modulus of elasticity is the ratio of stress to strain, provided the load does not exceed the
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Ibeere 13 Ìròyìn
Two equal capacitances are connected first in series and then in parallel. The ratio of the effective series capacitance to the effective parallel capacitance is
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Ibeere 14 Ìròyìn
A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the
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Ibeere 15 Ìròyìn
Which of the following properties is NOT exhibited by sound waves?
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Ibeere 18 Ìròyìn
A machine has an efficiency of 80%. If the machine is required to overcome a load of 60N with a force of 40N, calculate its velocity ratio.
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Ibeere 19 Ìròyìn
Which of the following statements about the concept of solid friction is NOT true?
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Ibeere 20 Ìròyìn
The resistance of a series R-C circuit is 5 ω If the impedance of the circuit is 13 ω calculate the reactance of the capacitor
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Ibeere 21 Ìròyìn
In 90 seconds, the mass of a radioactive element reduces to \(\frac{1}{16}\) of its original value. Determine the half- life of the element.
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Ibeere 22 Ìròyìn
Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain
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Ibeere 23 Ìròyìn
A wire of length 100cm and cross-sectional area 2.0 × 10-3cm2 has a resistance of 0.10 ω. Calculate its electrical conductively.
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Ibeere 25 Ìròyìn
Which of the following scientists postulated that moving particles exhibit wave properties?
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Ibeere 26 Ìròyìn
Which of the following radiations have the longest wavelength?
Ibeere 27 Ìròyìn
Calculate the critical angle for light travelling from water to air. (Refractive index of water = 1.33)
Ibeere 29 Ìròyìn
A stone is released from a height of 80m above the ground. Calculate its velocity just before it strikes the ground. (g=10ms-2)
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Ibeere 31 Ìròyìn
How much heat is required to convert 50g of water at 100°C to steam at the same temperature? (Specific latent heat of vaporization of water = 2260 Jg-11)
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Ibeere 33 Ìròyìn
Which of the following motions will be produced by a pair of equal, opposite and non-collinear parallel forces acting on a body?
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Ibeere 34 Ìròyìn
A sheet of white paper viewed through blue glass appears blue because
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Ibeere 36 Ìròyìn
Evaporation of a liquid produces cooling of the liquid because the
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Ibeere 37 Ìròyìn
A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C.
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Ibeere 38 Ìròyìn
A ball of mass m moving at velocity u collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.
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Ibeere 40 Ìròyìn
An object is placed 30 cm in front of a concave mirror of focal length 20cm. Calculate the distance between the object and the image.
Ibeere 42 Ìròyìn
A body is launched from the earth’s surface, of radius R, so that it just escapes from the gravitational influence of the earth; If the gravitational constant is G and the mass of the earth is M, what is the escape velocity of the boby.
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Ibeere 43 Ìròyìn
Lines of force
I. Begin and end on equal and opposite electric charges.
II. are in state of tension which causes them to shorten
III. attract one another.
Which of the statement(s) is/are correct?
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Ibeere 44 Ìròyìn
\(^{226}_{88}Ra\) \(\to\) \(^{222}_{866}Rn\) + X + Energy. The equation above represents a nuclear decay of radium isotope. What is X?
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Ibeere 45 Ìròyìn
Which of the following statement(s) is/are correct?
I. When a liquid expands its density falls
II. When a mercury-in-glass thermometer is placed in a hot liquid, the mercury level first descends and then rises.
III. The apparent expansion of a liquid is greater than its real expansion.
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