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49 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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Past Questions

49 questions

Question 1 of 20 49 total questions

Question 1

jamb 1978

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

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Question 2

jamb 1978

The equivalent capacitance for the circuit drawn above is

A18µf

B4µf

C2µf

D12µf

E13µf

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Question 3

jamb 1978

In The Diagram, what is the value of W

A5N

B10N

C15N

D20N

E30N

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Question 4

jamb 1978

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 5

jamb 1978

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 6

jamb 1978

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

EA and B above

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Question 7

jamb 1978

Of the following which is different from the other?

Ax-rays

Bgamma-rays

Ccathode rays

Dultra violet rays

Einfrared rays

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Question 8

jamb 1978

For the correction of myopic defects in the human eye we require

Aa convex lens

Ba concave lens

Ca combination of concave and convex lenses

Da prism

Ea concave mirror

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Question 9

jamb 1978

A string is sustaining a stationary wave when

Athe frequency of the wave is not proportional to the wavelength of the wave

Bthe amplitude of vibration is always zero

Ctwo equal waves are travelling in opposite directions

Dthe waves are longitudinal

Ethe frequency is directly proportional to the length of the string

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Question 10

jamb 1978

Which of the following is true for the image formed by a convex mirror? i. the image is always virtual ii. the image is always erect iii. the image lies between pole and focus iv. the image is never magnified v. the focus length is negative

Ai only

Bi and ii only

Cii and iii only

Di, ii, iii and iv only

Eall five

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Question 11

jamb 1978

The angular dispersion of a prism depends on

Athe index of refraction only

Bthe angle of incidence as well as the index of refraction

Cthe angle of incidence only

Dthe thickness of the prism

Ethe prism angle

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Question 12

jamb 1978

An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit distance from each mirror, the number of images formed is

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Question 13

jamb 1978

The visible part of light consists of the following colours

Ared, indigo, infra-red, violet, yellow, green and blue

Bred, green, blue, violet, indigo, orange and yellow

Cblue, ultra-violet, infra-red, red, yellow, indigo, violet,green and orange

Dinfra-red and ultra-violet

Ered, orange, yellow, green, blue, indigo and infra-red

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Question 14

jamb 1978

an object 1cm high placed on the axis 15cm from a converging lens forms an image 30cm from the lens. The size of the image is

A0.5cm

B1.5cm

C3cm

D2.5m

E2cm

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Question 15

jamb 1978

A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the velocity of sound in air if the cliff is 680m away?

A170ms^-1

B136ms^-1

C340ms^-1

D680ms^-1

E510ms^-1

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Question 16

jamb 1978

The boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each of two tin cans. The physical principle employed is that sound travels

Amainly through air

Bfainter in stretched string

Cfaster through gases than in solids and liquids

Dwith greater ease through a string than in air

Enone of the above is correct

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Question 17

jamb 1978

a guitar string is 75cm long. the wavelength of its fundamental note is

A75cm

B150cm

C37.5cm

D112cm

E50cm

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Question 18

jamb 1978

An electric charge could be transmitted through

Awood, rubber and stone

Bpaper, clay and plastic

Cglass, acid and cloth

DThe human body, water and metals

Eall of the above

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Question 19

jamb 1978

Every house supplied with electricity is provided with a box of fuses so that

Athe consumption of electricity can be recorded

Bpeople residing in the house will not have an electric shock if they touch a live wire

Cthe total current drawn from the mains can be limited

Dthe voltage supply can be stabilized

Eit serves as a standby supply when there is a power failure

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Question 20

jamb 1978

The electric supply from Kainji Dam is transmitted at high voltages of the order hundreds of kilovolts but is converted to domestic use of about 220 volts by

Acommutators

Btransistors

Cvalves and diodes

Drectifiers

Etransformers

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