A man standing between two parallel mirrors in a barber's shop will see the following number of his own image
Aeight
Btwo
Cfour
Done
Einfinite
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Question 1212
jamb1979
If a given mass at constant pressure obeys the relation...volume is proportional to the absolute temperature...the gas is said to obey
AHooke's Law
BBoyle's Law
CDalton's Law
DCharles' Law
ENewton's Law
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Question 1213
jamb1979
An object is placed 30cm from a concave mirror of focal length 15cm. the linear magnification of the image produced is
Ao
B\(\frac{2}{3}\)
C1
D2
E3
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Question 1214
jamb1979
The heights of the mercury thread in a mercury-in-glass thermometer when in melting ice and then in steam are 3cm and 18cm respectively. At a temperature of 60oC the height would be
A7.5cm
B9cm
C10.8cm
D12cm
E12.6cm
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Question 1215
jamb1979
If the wavelength of a wave travelling with a velocity of 360ms-1 is 60m, the period of the wave is
A6s
B3.6s
C0.17s
D0.61s
E3s
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Question 1216
jamb1979
When the vapour of a substance is in equilibrium with its own liquid, it is said to be
Agaseous
Bunsaturated
Cliquefied
Ddiffused
Esaturated
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Question 1217
jamb1979
In what range of temperature is the expansion of water anomalous?
A+208oC to +212oC
B-80oC + -76oC
C-4oC to 0oC
D+96oC to +100oC
E0oC to +4oC
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Question 1218
jamb1979
If in a simple pendulum experiment the length of the inextensible string is increased by a factor of four, its period is increased by a factor of
A4
B\(\frac{\pi}{2}\)
C\(\frac{1}{4}\)
D2\(\pi\)
E2
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Question 1219
jamb1979
Which of the following types of waves cannot travel through a vacuum?
Asound waves
Blight waves
Cinfra-red waves
Dx-radiation
Eradio waves
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Question 1220
jamb1979
The temperature at which the water vapour present in the air saturates the air and begins to condense is known as
Aboiling point
Bmelting point
Ctriple point
Ddew point
Ecritical temperature
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Question 1221
jamb1979
Two closed vessels contain equal volumes of boiling water and are identical except that one is blackened on the outside while the other is polished. Which of the following is correct?
Athe polished vessel will cool faster because a polished surface is a good radiator
Bthe polished vessel will cool faster because it will absorbe less heat from the room
Cthe black vessel will cool faster because it is a better conductor of heat
Dthe polished vesselwill cool faster because it reflects heat better
Ethe black vessel will cool faster because a black surface radiates heat faster than a polished one
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Question 1222
jamb1979
A 500kg car which was initially at rest travelled with an acceleration of 5m sec-2, its kinetic energy after 4 seconds was
A105J
B2.5 x 103J
C2 x 103J
D5 x 103J
E5 x 105J`
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Question 1223
jamb1979
Which of the following statements defines correctly the efficiency of a machine?
Athe load carried by the machine divided by effort required in carrying the load
Bthe distance moved by the load divided by the distance moved by the effort
Cthe useful work done by the machine divided by the total work put into the machine
Dthe movement of the load divided by the movement of the effort about the same point
Ethe temperature at the end of the application of the machine divided by the initial temperature
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Question 1224
jamb1979
The density 400cm3 of palm oil was 0.9gcm-3 before frying. If the density of the oil was 0.6gm-3 after frying,assuming no loss of oil due to spilling, its new volume was
A360cm3
B600cm3
C240cm3
D800cm3
E450cm3
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Question 1225
jamb1978
An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit from each mirror. The number of images formed is
A1
B2
C3
D4
E5
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Question 1226
jamb1978
The equivalent capacitance for the circuit drawn above is
A18µf
B4µf
C2µf
D12µf
E13µf
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Question 1227
jamb1978
In The Diagram, what is the value of W
A5N
B10N
C15N
D20N
E30N
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Question 1228
jamb1978
Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is
A10W
B20W
C40W
D80W
ENone of the above
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Question 1229
jamb1978
The amount of heat required to raise the temperature of a body is
AThermal energy
Bthermal conduction
Cheat loss
Dspecific heat capacity
Ethermal capacity
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Question 1230
jamb1978
The net charge on the atom is zero because
Athe electrons and the protons that are charged are in the nucleus
Bthe total charge on the electrons is equal to the total charge on the protons
Cthe neutrons from a shield around the charged protons
Dthe number of electrons in an atom is half the number of protons
