JAMB UTME - Physics - 1980
Frage 3 Bericht
A cell has an open circuit voltage V1 and a closed circuit voltage V2 when a current is flowing through it. Therefore, the internal resistance of the cell is
Antwortdetails
Frage 4 Bericht
A given quantity of heat increases the temperature of 150grams of water from 9oC to 15oC and increases the temperature of oil of 100grams from 9oC to 25oC. The ratio of the specific heat of oil to that of water is
Antwortdetails
Frage 6 Bericht
The name given to the characteristics behaviour of substances which set their length perpendicular to a strong magnetic field instead of in line with it is
Antwortdetails
Frage 7 Bericht
Any line or section through an advancing wave in which all the particles are in the same phase is called the
Antwortdetails
Frage 9 Bericht
What is the relative permitivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads?
Antwortdetails
Frage 10 Bericht
Heat is supplied to a block of ice 0o until half of it has melted. Which of the following statements is true?
Antwortdetails
Frage 11 Bericht
Which of the following statements are true of the law of universal gravitation?
Antwortdetails
Frage 13 Bericht
In the diagram above, a ray of light passes from glass into air, if the angle of incidence in glass is a and angle of refraction in air is \( \beta \) which of following statements is true???
Frage 14 Bericht
An object of mass m and volume v, is totally immersed in a liquid of density p. The tension of a string holding it is
Frage 15 Bericht
A milliameter of resistance 5\(\Omega\) and full scale deflection of 5m A is to used to measure a potential difference of 50 V. The resistance of the multiplier should be
Antwortdetails
Frage 16 Bericht
a calorimeter of thermal capacity 80j contains 20g of water at 25oC. Water at 100oC is added so that the final temperature of the set-ups is 50oC. The amount of water added is (Heat capacity of water = 4.18J/g/oC)
Antwortdetails
Frage 17 Bericht
Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is
Frage 18 Bericht
Which of the following elements is the best absorber of X-rays?
Frage 20 Bericht
A quantity of sungas at -133 occupies 1/3m3 under pressure 1.4 x 105 Nm-2. if the gas occupies 31 m-2 at 37oC, its pressure will be
Antwortdetails
Frage 21 Bericht
A stand-by generator is connected to fifteen 40 W lamps and musician's 600 W amplifying system. How much energy is used if the generator runs for 6 hours?
Antwortdetails
Frage 22 Bericht
The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9, 19.3, 10.5. A metal ornament which weighs 0.425kg and can displace 50 x 10-6m3m of water is made of
Antwortdetails
Frage 23 Bericht
Which of the following radiations cannot be deflected by a magnetic field?
Antwortdetails
Frage 24 Bericht
The water at the bottom of a waterfall is slightly warmer than that at the top because part of the
Antwortdetails
Frage 25 Bericht
the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is
Antwortdetails
Frage 26 Bericht
In sunlight, a blue flower looks blue because we see the flower by the light it
Antwortdetails
Frage 27 Bericht
If the volume of a fixed mass of a gas is kept constant, the pressure of the gas
Antwortdetails
Frage 28 Bericht
a pressure cooker saves both time and fuel in cooking because inside the cooker, the
Antwortdetails
Frage 30 Bericht
In the diagram above, MN is perpendicular to ON and MR what is the difference between the moment about N of the force of 20 Newtons applied along MP an its moment about 0
Antwortdetails
Frage 31 Bericht
If the magnification of a virtual image formed of an object 10cm from a convex lens is 3, then the focal length of the lens is
Antwortdetails
Frage 33 Bericht
A tugboat is travelling from Asaba to Onitsha across the River Niger with a resultant velocity of 20 knots. If the river flows at 12 knots, the direction of motion of the boat relative to the direction of water flow is
Antwortdetails
Frage 34 Bericht
Which of the following statements is NOT true of the image in a plane mirror? The image is
Frage 35 Bericht
What is the acceleration of a particle whose motion is graphically displayed in the diagram above
Antwortdetails
Frage 38 Bericht
which of the following does NOT cause a reduction of the surface tension of water?
Antwortdetails
Frage 39 Bericht
The motion of the moving skin of a talking drum can rightly be described as
Antwortdetails
Frage 40 Bericht
The Diagram above shows the prism arrangement in a
Frage 41 Bericht
In a compound microscope
Frage 42 Bericht
Which of the following statements on the use of X-rays is incorrect? X-rays are used
Antwortdetails
Frage 43 Bericht
In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the
Antwortdetails
Frage 44 Bericht
A man stands one-third of the way between two walls and claps his hands, He hears two distinct echoes 1s apart. If the speed of sound is 330ms-1 the distance between the wall is
Antwortdetails
Frage 45 Bericht
The best material for the core of the primary and secondary coils of an induction coil is
Antwortdetails
Frage 46 Bericht
In the study of physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two element?
Antwortdetails
Frage 47 Bericht
Which of the following statements are true in the structure of atoms?
