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Physics Past Questions

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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 2271

jamb 1981

An object placed on the principle axis of a convex lens of focal length 10m produces a real image of double magnification. The image distance from the lens is

A30cm

B25cm

C20cm

D15cm

E10cm

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Question 2272

jamb 1981

The mass of a proton is approximately equal to that of

Aan \(\alpha\)-particle

Ba \(\beta\)-particle

C\(\gamma\)-ray

Dan electron

Ea neutron

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Question 2273

jamb 1981

The quantity (timbre) of sound depends on

Aamplitude

Bfrequency

Charmonics

Dvelocity

Ewavelength

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Question 2274

jamb 1981

Change of state is accompanied by change of?

Atemperature

Bvolume

Cheat content

Dtemperature and volume

Evolume and heat content

View Explanation & Discuss

Question 2275

jamb 1981

a balloon inflated with helium gas at ground level is released. As it rises through a constant temperature atmosphere.

Aits pressuren reduces but volume remains constant

Bte product of pressure and volume remains constant

Cboth pressure and volume increases

Dits pressure remains constant but the volume decreases

Eboth pressure and volume remains constant

View Explanation & Discuss

Question 2276

jamb 1981

Two particles X and Y starting from rest cover the same distance. The acceleration of X is twice that of Y. the ratio of the time taken by X to that taken by Y is

A\(\frac{1}{2}\)

B\(\frac{2}{\sqrt2}\)

C\(\frac{1}{\sqrt2}\)

D\(\sqrt 2\)

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Question 2277

jamb 1981

Alternating current can induce voltage because it has a

Aripple value

Bvarying magnetic field

Cweaker magnetic field than direct current

Dstonger magnetic field than direct current

Ehigh peak value

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Question 2278

jamb 1981

A body falls freely under gravity (g = 9.8ms-2) from a height of 40m on to the top of a platform 0.8m above the ground. Its velocity on reaching the platform is

A784ms^-1

B80ms^-1

C78.4ms^-1

D39.2ms^-1

E27.7ms^-1

View Explanation & Discuss

Question 2279

jamb 1981

The lack of power of accommodation which is mainly due to the hardening of the eye lens and is usual with onset of old age is called?

Amyopia

Bhypermyopia

Cpresbyopia

Dastigmatism

Eeye ring

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Question 2280

jamb 1981

The resistance of an open series circuit is

Azero

Bhalf the normal resistance of the circuit

Cdouble the normal resistance of the circuit

Done

Einfinite

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Question 2281

jamb 1981

Which type of radiation does not NOT originate within the nucleus?

Aalpha

Bbeta

Cgamma

Dneutron

Ex-rays

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Question 2282

jamb 1981

Which of the following statements is CORRECT?

Acharges generated on glass rubbed with silk are called negative

Bcharges in various media can be carried by protons detached from their atom

Cthe magnitude of any charge is a multiple of the charge of an electron

Dthe intensity of an electric field is a scalar quantity

Eif 500 joules of work are required to move a 2-coulomb charge between two points, the potential difference between the two point is 100V

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Question 2283

jamb 1981

The absolute refractive indices of glass and water are \(\frac{3}{2}\) and \(\frac{4}{3}\) respectively. The refractive index at the interface when a ray travels from water to glass is

A\(\frac{1}{2}\)

B\(\frac{8}{9}\)

C\(\frac{9}{8}\)

D\(\frac{17}{12}\)

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Question 2284

jamb 1981

The driver in a motor car, of which the total mass is 800kg and which is traveling at 20ms-1, suddenly observes a stationary dog in his path 50m ahead. If the car brakes can exert a force of 2000N, what will most likely happen?

Athe car will be able to stop immediately the driver notices the dog

Bthe car will stop 30m after hitting the dog

Cthe car will stop 20m in front of the dog

Dthe driver will quickly reverse the car

Ethe car will stop 5m beyound the dog

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Question 2285

jamb 1981

All of the following frequencies are overtones of 320 Hz EXCEPT

A960Hz

B640Hz

C520Hz

D1280Hz

E1600Hz

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Question 2286

jamb 1981

An aircraft travelled from calabar to kano as follows: it flew first to ilorin convering a distance of 300km, 30^o west of North, and then flew 400km, 60^o East of North to kano. What is the resultant displacement?

A567km

B410km

C594km

D500km

E600km

View Explanation & Discuss

Question 2287

jamb 1981

The resistance of a 240V, 60 watt electric filament bulb is

A0.25\(\Omega\)

B480\(\Omega\)

C60\(\Omega\)

D240\(\Omega\)

E960\(\Omega\)

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Question 2288

jamb 1981

When a ray of light passes from water to glass, it is

Abent away from the normal

Bbent towards the normal

Ctotally internally reflected

Dabsorbed by the glass

Ebroken into a pure spectrum

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Question 2289

jamb 1981

Heat was supplied to a block of ice at 0^oC until half of it melted. Which of the following statements is true?

Athe temperature rises and the ice expand

Bthe temperature remains constant and the volume of the ice decreases

Cthe ice gives out heat as it melts and the temperature decreases

Dthe mass remains constant and the temperature increases

Ethe temperature decreases because some heat is lost

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Question 2290

jamb 1981

An example of a scalar quantity is

Avelocity

Bweight

Celectric charge

Dacceleration due to gravity

Emomentum

View Explanation & Discuss

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