The lack of power of accommodation which is mainly due to the hardening of the eye lens and is usual with onset of old age is called?
Amyopia
Bhypermyopia
Cpresbyopia
Dastigmatism
Eeye ring
View Explanation & Discuss
Question 12
jamb1981
The resistance of an open series circuit is
Azero
Bhalf the normal resistance of the circuit
Cdouble the normal resistance of the circuit
Done
Einfinite
View Explanation & Discuss
Question 13
jamb1981
Which type of radiation does not NOT originate within the nucleus?
Aalpha
Bbeta
Cgamma
Dneutron
Ex-rays
View Explanation & Discuss
Question 14
jamb1981
Which of the following statements is CORRECT?
Acharges generated on glass rubbed with silk are called negative
Bcharges in various media can be carried by protons detached from their atom
Cthe magnitude of any charge is a multiple of the charge of an electron
Dthe intensity of an electric field is a scalar quantity
Eif 500 joules of work are required to move a 2-coulomb charge between two points, the potential difference between the two point is 100V
View Explanation & Discuss
Question 15
jamb1981
The absolute refractive indices of glass and water are \(\frac{3}{2}\) and \(\frac{4}{3}\) respectively. The refractive index at the interface when a ray travels from water to glass is
A\(\frac{1}{2}\)
B\(\frac{8}{9}\)
C\(\frac{9}{8}\)
D\(\frac{17}{12}\)
E2
View Explanation & Discuss
Question 16
jamb1981
The driver in a motor car, of which the total mass is 800kg and which is traveling at 20ms-1, suddenly observes a stationary dog in his path 50m ahead. If the car brakes can exert a force of 2000N, what will most likely happen?
Athe car will be able to stop immediately the driver notices the dog
Bthe car will stop 30m after hitting the dog
Cthe car will stop 20m in front of the dog
Dthe driver will quickly reverse the car
Ethe car will stop 5m beyound the dog
View Explanation & Discuss
Question 17
jamb1981
All of the following frequencies are overtones of 320 Hz EXCEPT
A960Hz
B640Hz
C520Hz
D1280Hz
E1600Hz
View Explanation & Discuss
Question 18
jamb1981
An aircraft travelled from calabar to kano as follows: it flew first to ilorin convering a distance of 300km, 30o west of North, and then flew 400km, 60o East of North to kano. What is the resultant displacement?
A567km
B410km
C594km
D500km
E600km
View Explanation & Discuss
Question 19
jamb1981
The resistance of a 240V, 60 watt electric filament bulb is
A0.25\(\Omega\)
B480\(\Omega\)
C60\(\Omega\)
D240\(\Omega\)
E960\(\Omega\)
View Explanation & Discuss
Question 20
jamb1981
When a ray of light passes from water to glass, it is
Abent away from the normal
Bbent towards the normal
Ctotally internally reflected
Dabsorbed by the glass
Ebroken into a pure spectrum
View Explanation & Discuss
Question 21
jamb1981
Heat was supplied to a block of ice at 0oC until half of it melted. Which of the following statements is true?
Athe temperature rises and the ice expand
Bthe temperature remains constant and the volume of the ice decreases
Cthe ice gives out heat as it melts and the temperature decreases
Dthe mass remains constant and the temperature increases
Ethe temperature decreases because some heat is lost
View Explanation & Discuss
Question 22
jamb1981
An example of a scalar quantity is
Avelocity
Bweight
Celectric charge
Dacceleration due to gravity
Emomentum
View Explanation & Discuss
Question 23
jamb1981
A cell of e.m.f 2V and internal resistance 1\(\Omega\) supplies a current of 0.5 amps to a resistance whose value is
A0.5\(\Omega\)
B1\(\Omega\)
C2\(\Omega\)
D2.5\(\Omega\)
E3\(\Omega\)
View Explanation & Discuss
Question 24
jamb1981
Which of the following is NOT an effect that can be produced by an electric current?
Aheat
Blight
Csound
Dmotion
Enone of the above
View Explanation & Discuss
Question 25
jamb1981
Which of the following statements is applicable to a real image formed by a concave mirror? i. it can be observed on a screen ii. it is always inverted and in front of the mirror iii. it only seams to exist IV. it is formed by the actual converging of rays of light
Ai, ii and iii
Bi, ii and iv only
Ci and ii only
Di and ii only
Eall four statements
View Explanation & Discuss
Question 26
jamb1981
Heat may be transferred by conduction, convection and radiation. By which of these methods does heat travel through vacuum?
Aconduction only
Bconvection only
Cradiation only
Dnon of these methods
View Explanation & Discuss
Question 27
jamb1981
An inclined plane of angle \(\theta\), acting as a simple machine, has a velocity ratio
Asin\(\theta\)
B\(\frac{1}{\text{sin}\theta}\)
Ccos\(\theta\)
D\(\frac{1}{\text{cos}\theta}\)
Esin\(\theta cos\theta\)
View Explanation & Discuss
Question 28
jamb1981
Which of the following elements are real magnetic materials?
AIron, steel and nickel
Bcopper, steel and iron
Clead, iron and brass
Dglass, lead and steel
Estone, air and iron
View Explanation & Discuss
Question 29
jamb1981
If a source of sound is moving, a stationary listener will hear a sound of different frequency. This is called
ADoppler effect
BResonance
CUltra sound
DDiffraction of sound
ERarefaction
View Explanation & Discuss
Question 30
jamb1981
Which of the following does NOT describe the image formed by a plane mirror?
