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2,483 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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2,483 questions

Question 1 of 20 2,483 total questions

Question 1171

jamb 1980

Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is

A0.30

B0.60

C1.67

D2.33

E2.36

View Explanation & Discuss

Question 1172

jamb 1980

What is the acceleration of a particle whose motion is graphically displayed in the diagram above

A0.67ms^-2

B0.83ms^-2

C0.87ms^-2

D92ms^-2

E2.0ms^-2

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Question 1173

jamb 1980

The Diagram above shows the prism arrangement in a

AMicroscope

Btereoscope

Cprojector

Dperiscope

Egyroscope

View Explanation & Discuss

Question 1174

jamb 1980

The total capacitance of the circuit above is?

A0.25mF

B0.50mF

C0.75mF

D1.25mF

E1.50mF

View Explanation & Discuss

Question 1175

jamb 1980

What is the total resistance in the above diagram?

A5 ohms

B15 ohms

C25 ohms

D35 ohms

E45 ohms

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Question 1176

jamb 1980

Natural radioactivity consists of the emission of

A\( \alpha \) -particle and \( \beta \) rays

B\( \alpha \) -particle and X-rays

C\( \gamma \)-rays and X-rays

D\( \alpha \)-particle, \( \beta \) rays and \( \gamma \)-rays

E\( \alpha \) -particle, \( \beta \) rays, \( \gamma \)-rays and X-rays

View Explanation & Discuss

Question 1177

jamb 1980

The activity of a radioactive substance depends on

Atemperature and purity

Btemperature and age

Cpurity and age

Dage, purity and temperature

Enone of the above

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Question 1178

jamb 1980

In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the

Asame in sign and quantity

Bsame in sign but greater

Copposite in sign but greater

Dopposite in sign but less

Eopposite in sign but equal

View Explanation & Discuss

Question 1179

jamb 1980

According to Ohm's law, the ratio V/I is constant for

Aan electrolyte

Ba diode

Ca transistor

Dsilver

Eall of the above

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Question 1180

jamb 1980

A cell has an open circuit voltage V1 and a closed circuit voltage V2 when a current is flowing through it. Therefore, the internal resistance of the cell is

A\(\frac{V_2}{I}\)

B\(\frac{V_1}{I}\)

C\(\frac{(V_1 + V_2)}{I}\)

D\(\frac{(V_1 - V_2)}{I}\)

E\(\frac{(V_2 - V_1)}{I}\)

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Question 1181

jamb 1980

A man stands one-third of the way between two walls and claps his hands, He hears two distinct echoes 1s apart. If the speed of sound is 330ms^-1 the distance between the wall is

A33m

B110m

C220m

D330m

E495m

View Explanation & Discuss

Question 1182

jamb 1980

the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is

B1.5

C1.32

E0.67

View Explanation & Discuss

Question 1183

jamb 1980

a calorimeter of thermal capacity 80j contains 20g of water at 25^oC. Water at 100^oC is added so that the final temperature of the set-ups is 50^oC. The amount of water added is (Heat capacity of water = 4.18J/g/^oC)

A20g

B25g

C45g

D50g

E100g

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Question 1184

jamb 1980

Which of the following elements is the best absorber of X-rays?

Ahydrogen

Boxygen

Ccalcium

Dcopper

Elead

View Explanation & Discuss

Question 1185

jamb 1980

Which of the following radiations cannot be deflected by a magnetic field?

A\(\alpha\)

B\(\beta\)

C\(\gamma\)

D\(\beta\) and \(\gamma\)

Enone of them

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Question 1186

jamb 1980

The best material for the core of the primary and secondary coils of an induction coil is

Acopper, because it has a good conductor of electricity

Bsteel, because it becomes magnetic and retains its magnetism for a long time

Crubber, because it is a good insulator and the user is prevented from shock

Dsoft iron, because it becomes magnetic but easily loses its magnetism

Eglass, because it is transparent

View Explanation & Discuss

Question 1187

jamb 1980

High Tension(H.T.) transmission means

Ato transmit a given amount of power, the tension in the conducting wire must be high

Bheat is not lost when current is passed through a conductor

Cheat is gained when a given power is transmitted

Da big transformer is required to transmit power

Etrasmission of power at low current and high voltage

View Explanation & Discuss

Question 1188

jamb 1980

In sunlight, a blue flower looks blue because we see the flower by the light it

Arecieves from our eye

Bdisperses

Cabsorbs

Drefracts

Ereflects

View Explanation & Discuss

Question 1189

jamb 1980

In a compound microscope

Athere is only one lens

Bthe objective lens have a shorter focal length than the eyepiece which is convex

Cthe objective lens has a longer focal length than the eyepiece which is convex

Dthe objective lens has a shorter focal length than the eyepiece which is concave

Ethe objective and the eyepiece are both convex and have the same focal length

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Question 1190

jamb 1980

Which of the following statements about sound is NOT true?

Asound is a longitudinal wave

Bsound can be reflected and refracted like light

Csound travels through a vacuum

Dsound moves faster in a steel wire than in air

Esound can ony be produced by vibrating objects

View Explanation & Discuss

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