The breaking up of an atomic nucleus into the fragment of nearly equal size is known as
Anuclear fusion
Bnuclear fission
Cthermonuclear reaction
Dnatural radioactivity
View Explanation & Discuss
Question 1072
waec2006
The force experienced by a current-carrying conductor move in a magnetic field is employed in the working of the i. moving coil ammeter ii. electric bell iii. electric motor. Which of the statements above are correct?
Ai and ii only
Bii and iii only
Ci and iii only
Di, ii and iii
View Explanation & Discuss
Question 1073
waec2006
Which of the following statements about a bar magnet is correct?
Airon fillings cling uniformly along the length of a bar magnet
Bthe magnetic properties are more pronounced at the middle of a magnet
Cit is impossible to have the same poles at the end of a magnet
Dthe magnetic properties are more pronounced at points near the end of the bar
View Explanation & Discuss
Question 1074
waec2006
An electric lamp rated 120W is used on a 240Vrms, calculate the resistance of its filament
A480\(\Omega\)
B360\(\Omega\)
C60\(\Omega\)
D2\(\Omega\)
View Explanation & Discuss
Question 1075
waec2006
a cell of e.m.f. 1.5V and internal resistance 1.0\(\Omega\) is connected to two resistor of resistance 2.0\(\Omega\) and 3.0\(\Omega\) in series. Calculate the current through the resistors
A0.25A
B0.30A
C0.35A
D0.50A
View Explanation & Discuss
Question 1076
waec2006
The equivalent capacitance of a 3\(\mu F\) capacitor and a 6\(\mu F\) capacitor connected in parallel is
A2.0\(\mu F\)
B3.0\(\mu F\)
C4.5\(\mu F\)
D9.0\(\mu F\)
View Explanation & Discuss
Question 1077
waec2006
Which of the following factors does not affect the capacitance of a parallel plate capacitor?
Aarea of the plates
Bnature of the surface of the plates
Cdistance of separation between the plates
Dnature of the insulating material between the plates
View Explanation & Discuss
Question 1078
waec2006
An electron of mass m and charge \(\Box\) enters a uniform electric field between two metal plates P and q separated by a distance d. P is maintained at a potential V while Q is earthed. Determine an expression for the magnitude of the acceleration of electron through the field
A\(\frac{eV}{md}\)
B\(\frac{d}{meV}\)
C\(\frac{md}{eV}\)
D\(\frac{e}{Vmd}\)
View Explanation & Discuss
Question 1079
waec2006
The acceleration due o gravity may be defined as the force
Aof attraction of the sun and on the earth
Bwith which the earth revolves around the sun
Cwith which the earth attracts one kilo-gram mass
Dof the moon on the earth
View Explanation & Discuss
Question 1080
waec2006
Which of the following actions is necessary in order to tune a string to produce a note of an octave higher than its fundamental?
Adoucling the length of the string
Breducing the tension by half
Creducing the mass per unit length
Dincreasing the tension four times
View Explanation & Discuss
Question 1081
waec2006
In which of the following media would sound wave travel fastest?
Awood
Bwater
Ciron
Dmercury
View Explanation & Discuss
Question 1082
waec2006
A travelling microscope is focused on a mark on a table. If a glass block of thickness 18.0cm is placed on the mark by how many centimeters will the microscope be moved upwards so as to focus the mark once again? [refractive index of glass = 1.5]
A27cm
B24cm
C9cm
D6cm
View Explanation & Discuss
Question 1083
waec2006
Which of the following distances is usually adjustable in the camera? The distance between the
Alens and the film
Bdiaphragm and the shutter
Cshutter and the film
Ddiaphragm and the film
View Explanation & Discuss
Question 1084
waec2006
A ray from a fixed object is incident on a plane mirror at an angle of 20o. If the mirror is rotated through 30o by how many degree would the reflected ray rotate?
A60o
B50o
C40o
D30o
View Explanation & Discuss
Question 1085
waec2006
The distance between the successive crests of a wave travelling at 20ms\(^{-1}\) is 25cm. Calculate the frequency of the wave
A0.8Hz
B5.0Hz
C50.0Hz
D80.0hz
View Explanation & Discuss
Question 1086
waec2006
Which of the following observations cannot be explained using the rectilinear propagation of light?
Aproduction of images by a pinhole camera
Bproduction of real images of objects by lenses
Cformation of an annular eclipse
Ddiffraction patterns of light
View Explanation & Discuss
Question 1087
waec2006
The eclipse of the moon occurs when the
Amoon comes exactly between the earth and the sun
Bearth comes exactly between the moon and the sun
Csun comes exactly between the earth and the moon
Dmoon reflects all the rays from the sun onto the earth
View Explanation & Discuss
Question 1088
waec2006
a note of frequency 2000Hz has a velocity of 400 ms-1. calculate the wavelength of the note
A5.0m
B2.0m
C0.5m
D0.2m
View Explanation & Discuss
Question 1089
waec2006
The S.I units of frequency, period and amplitude of a wave are respectively
Ahertz, second and centimeter
Bsecond, metre and hertz
Cmetre, hertz and seconds
Dhertz, second and metre
View Explanation & Discuss
Question 1090
waec2006
The temperature of a liquid falls after some of it has evaporated because
Athe liquid left is smaller in volume and the breeae easily cools it
Bthe more energetic molecules have escaped into the atmosphere
