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4,719 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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4,719 questions

Question 1 of 20 4,719 total questions

Question 2201

jamb 1984

What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 kobo per kWh?

AN0.65

BN0.13

CN3.90

DN39.00

EN234.00

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Question 2202

jamb 1984

Radio waves have a velocity of 3 x 10⁸ms^-1. A radio station sends out a broadcast on a frequency of 800kHz. The wavelength of the broadcast is

A375.0m

B267.0m

C240.0m

D37.5m

E26.7m

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Question 2203

jamb 1984

Which of the following i. \(\beta\)-particles ii. protons iii. neutrons iv. \(\alpha\)-particles. may be found in light nuclei?

Ai and ii

Bi and iii

Cii and iv

Dii and iii

Ei, ii and iii

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Question 2204

jamb 1984

A device that converts sound energy into electrical energy is?

Athe horn of a motor car

Ban A.C. generator

Ca microphone

Dthe telephone

Eradio waves

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Question 2205

jamb 1984

Cathode rays are

Ahigh-energy electromagnetic waves

Bprotons

Cstreams of electrons

Dneutrons

Eradio waves

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Question 2206

jamb 1984

The spectrum of white light consists of coloured lights arranged in the following order

Ablue, red, green, yellow, indigo, violet, orange

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

Cred, orange, yellow, indigo, green, blue, violet

Dindigo, green, blue, violet, yellow, red, orange

Eyellow, blue, green, violet, orange, indigo, red

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Question 2207

jamb 1984

What is the apparent colour of a RED SHIRT when viewed in PURE green light?

ARed

BGreen

CYellow

DBlack

EBlue

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Question 2208

jamb 1984

If a water pump at Kainji Dam is capable of lifting 1000kg of water through a vertical height of 10m in 10s, the power of the pump is [g = 10ms^-2]

A1.0kW

B10.0kW

C12.5kW

D15.0kW

E20.0kW

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Question 2209

jamb 1984

Which of the following is a correct explanation of the inertia of a body?

Aability to overcome the earth's gravity

Breluctance to stop moving

Creadiness to start moving

Dreluctance to start moving and its readiness to stop moving once it has begun to move

Ereluctance to start moving its reluctance to stop moving once it has begun to move

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Question 2210

jamb 1984

A gun of mass 2.0kg fires a bullet of mass 16 x 10 ^-2kg due East. If the bullet leaves the nozzle of the gun with a velocity of 150ms^-1, what is the recoil velocity of the gun?

A150ms^-1 due West

B1.2 x 10^-4ms^-1 due West

C1.2ms^-1 due West

D1.2ms^-1 due East

E150ms^-1 due East

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Question 2211

jamb 1984

The electromotive force obtained from a simple dynamo may be increased by

Aincreasing the cross-sectional area of the coil

Bwinding the coil on a soft-iron armature so as to decrease the magnetic flux through the coil

Cincreasing the speed of rotation

Dmaking the field magnet longer

Eusing low-resistance copper coils

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Question 2212

jamb 1984

A coin is placed at the bottom of a cube of glass t cm thick. If the refractive index of the glass is \(\mu\), how high does the coin appear to be raised to an observer looking perpendicularly into the glass?

A\(\frac{1}{t - \mu}\)

B\(\frac{t(\mu - I)}{\mu}\)

Ct (1 + \(\frac{1}{\mu}\))

D-\(\mu\)

E\(\mu\)t

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Question 2213

jamb 1984

Which of the following statements about the compound microscope and astronomical telescope is (are) correct? i. the final image of a compound microscope is located at infinity ii. the final image of the astronomical telescope is always erect iii. the objective lens of a compound microscope has a very short focal length

Ai only

Bii only

Ciii only

Di and iii

Eii and iii

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Question 2214

jamb 1984

Which of the following properties of matter CANNOT be utilized for temperature measurement? The

Alength of a liquid column

Bvolume of a gas at constant pressure

Cpressure of a gas at constant volume

Dresistance of a metallic wire

Ecurrent produced in a photoelectric effect

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Question 2215

jamb 1984

A given mass of an ideal gas occupies a volume V at a temperature T and under a pressure p. If the pressure is increased to 2p and the temperature reduced to \(\frac{1}{2T}\), then the percentage change in the volume of the gas is

A0%

B25%

C75%

D300%

E400%

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Question 2216

jamb 1984

Heat is supplied uniformly at the rate of 100W to 1.0 x 10^-2kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5^oC, then the specific heat capacity of the liquid is

A2.0 x 10²Jkg^-1k^-1

B2.0 x 10²Jkg^-1

C4.0 x 10⁴Jkg^-1k^-1

D4.0 x 10⁴kg^-1

E8.4 x 10³Jkg^-1k^-1

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Question 2217

jamb 1984

A particle moves in a circular orbit of radius 0.02m. If the speed of the particle is 0.88ms^-1, calculate its frequency in cycles per second

A2.0Hz

B7.0Hz

C8.8Hz

D14.0Hz

E17.6Hz

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Question 2218

jamb 1984

Which of the following statements describes an atom accurately? i. atoms of all elements are identical ii. an atom contains a nucleus and number of electrons iii. due to the electrons in the atom an atom is negatively charged iv. electrons in the atom move in circular orbits round the nucleus

Ai and ii

Bii and iii

Ciii and iv

Dii and iv only

Ei,ii and iii

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Question 2219

jamb 1984

A small steel needle is carefully floated on water in a beaker. When a few drops of kerosine are introduced into the water the needle sink. Which of the following statements correctly explain(s) the observation? i. there is tension on the water surface ii. kerosine reduces the density of water so that needle becomes denser than water iii. kerosine reduces the surface tension of water

Ai only

Bii only

Ciii only

Di and ii

Ei and iii

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Question 2220

jamb 1984

A body of mass 5kg initially at rest is acted upon by two mutually perpendicular forces 12N and 5N as shown in fig.3. If the particle moves in the direction QA, calculate the magnitude of the acceleration

A0.40ms^-2

B1.40ms^-2

C0.26ms^-2

D2.60ms^-2

E3.40ms^-2

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