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Tambaya 2 Rahoto
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.
Tambaya 3 Rahoto
Which of the following scientists postulated that moving particles exhibit wave properties?
Bayanin Amsa
Tambaya 4 Rahoto
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
Bayanin Amsa
Tambaya 6 Rahoto
A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the
Bayanin Amsa
Tambaya 7 Rahoto
Calculate the critical angle for light travelling from water to air. (Refractive index of water = 1.33)
Tambaya 8 Rahoto
Which of the following instruments can be used to measure e.m.f. most accurately.
Bayanin Amsa
Tambaya 9 Rahoto
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.
Bayanin Amsa
Tambaya 10 Rahoto
Which of the following motions will be produced by a pair of equal, opposite and non-collinear parallel forces acting on a body?
Bayanin Amsa
Tambaya 12 Rahoto
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.
Bayanin Amsa
Tambaya 13 Rahoto
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
Tambaya 16 Rahoto
Which of the following radiations have the longest wavelength?
Tambaya 17 Rahoto
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.
Bayanin Amsa
Tambaya 18 Rahoto
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?
Bayanin Amsa
Tambaya 19 Rahoto
A sheet of white paper viewed through blue glass appears blue because
Bayanin Amsa
Tambaya 21 Rahoto
A wire of length 100cm and cross-sectional area 2.0 × 10-3cm2 has a resistance of 0.10 ω. Calculate its electrical conductively.
Bayanin Amsa
Tambaya 22 Rahoto
The inability of the eye to focus near objects is known as
Tambaya 23 Rahoto
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)
Bayanin Amsa
Tambaya 24 Rahoto
J.J. Thomson’s model of the atom was abandoned because
Tambaya 25 Rahoto
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
Tambaya 26 Rahoto
The space surrounding a magnet in which the magnetic force is exerted is
Bayanin Amsa
Tambaya 28 Rahoto
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.
Bayanin Amsa
Tambaya 31 Rahoto
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.
Bayanin Amsa
Tambaya 32 Rahoto
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.
Tambaya 33 Rahoto
Which of the following statements about the concept of solid friction is NOT true?
Bayanin Amsa
Tambaya 34 Rahoto
A constant force of 5N acts for 5s on a mass of 5kg initially at rest. Calculate the final momentum of the mass.
Bayanin Amsa
Tambaya 37 Rahoto
\(^{226}_{88}Ra\) \(\to\) \(^{222}_{866}Rn\) + X + Energy. The equation above represents a nuclear decay of radium isotope. What is X?
Tambaya 40 Rahoto
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.
Tambaya 41 Rahoto
Young’s modulus of elasticity is the ratio of stress to strain, provided the load does not exceed the
Bayanin Amsa
Tambaya 42 Rahoto
A stone is released from a height of 80m above the ground. Calculate its velocity just before it strikes the ground. (g=10ms-2)
Bayanin Amsa
Tambaya 43 Rahoto
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?
Bayanin Amsa
Tambaya 44 Rahoto
The mode of transference of heat which does not require any material medium is
Bayanin Amsa
Tambaya 45 Rahoto
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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