2008
Convex mirror are used as driving mirrors because images formed are?
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2008 JAMB UTME Physics Past Questions
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2008
An object of heights 5 cm is placed at 20 cm from a concave mirror of focal length 10 cm. the image height is?
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2008
An object of height 4cm is placed in front of a cuboid pinhole camera of size 6 cm. if the image formed is 2 cm high, how far is the object from the pinhole?
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2008
I. Total internal reflection of light.II. Conservation of light energy. III. Relative motion of the earth, sun and moon.IV. Rectilinear propation of light.Which of the above is a phenomenon of total solar eclipse?
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2008
A generator is on daily use and in the process, ten 60 W and five 40 W tungsten bulbs are on for the same time interval. the energy consumed daily is?
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2008
An electric generator has e.m.f. of 240 V and an internal resistance of 1Ω if the current supplied by the generatoris 20A when the terminal voltage is 220 V, find the ratio of the power supplied to the power dissipated?
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2008
A short chain is sometimes attached to the back of a petrol tanker to?
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2008
An observer with normal eyes views an object with magnifying glass of focal length 5 cm. the angular magnification is?[least distance of distinct vision D = 25 cm]
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2008
In the microscope, the eyepiece lens merely acts as?
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2008
When a pure semiconductor is heated, its resistance
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2008
Zener diode is used for?
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2008
Caesium has a work function of 3 x 10-19J. the maximum energy of liberated electrons when it is illuminated by light of frequency 6.7 x 1014HZ is?[h = 6.6 x 1010-34Js]
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2008
A step-down transformer has a power output of 50 W and efficiency of 80%. if the mains supply voltage is 200 v, calculate the primary current of the transformer.
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2008
The d.c generator has essentially the same components as the a.c generator except the presence of?
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2008
I. for current amplification.II. for voltage stabilization. III. for power amplification.IV. as a switch.which of the above are the uses of transistor?
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2008
An object 4 cm high is placed 15 cm from a concave mirror of focal length 5 cm. The size of the image is
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2008
A block of aluminum is heated electrically by a 30 w heater if the temperature rises by 10°c in 5 minutes, the heat capacity of the aluminum is
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2008
A body of mass 4 kg resting on a smooth horizontal plane is simultaneously acted upon by two perpendicular forces 6N and 8N. Calculate the acceleration of the motion.
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2008
A force F required to keep a 5 kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms-1. What is the speed, if the force is tripled?
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2008
The resultant of two forces 12N and 5N is 13N. What is the angle between the two forces?
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