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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 1351

neco 2002

What part of the camera corresponds to the iris of the eye?

Adiaphragm

Bfilm

Cfocusing ring

Dlens

Eshutter

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Question 1352

neco 2002

In which of the following are the substances arranged in descending order of their thermal conductivities?

Aaluminium, copper, iron

Baluminium, iron, copper

Ccopper, aluminium, iron

Dcopper, iron. aluminium

Eiron, copper, aluminium

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Question 1353

neco 2002

Which statement is NOT correct about Rutherford’s model of the atom?

AThe diameter of the nucleus is of the order of 10-15m

BThe mass of an atom is concentrated in the nucleus

CThe model is applicable to atoms with one electron in the outer shell

DThe nucleus of an atom is positively charged

EThe nucleus is surrounded by an electron cloud.

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Question 1354

neco 2002

A brass cube of side 10cm is heated through 30°C. If the linear expansivity of brass is 2.0 × I0\(^{-5}\) K-1 , what is the increase in its volume?

A0.06 cm³

B0.18cm³

C0.60cm³

D1.20cm³

E1.80cm³

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Question 1355

neco 2002

A body of mass 4 kg is accelerated from rest by a steady force of 9N. What is its speed when it has travelled a distance of 8m?

A6 ms^-1

B18 ms^-1

C32 ms^-1

D36 ms^-1

E48 ms^-1

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Question 1356

neco 2002

What is the escape velocity of a satellite launched from the earth’s surface? (Take g as 10ms\(^{-2}\) and the radius of the earth as 6.4 × 10\(^6\)m)

A7.80 × 10kms^-1

B11.2 × 10kms^-1

C3.56 × 107ms^-1

D6.00 × 107ms^-1

E1.20 × 108ms^-1

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Question 1357

neco 2002

In the normal use of a simple microscope, a person sees an

Aerect, real and magnified image

Berect, virtual and magnified image

Cinverted, virtual and magnified image

Dinverted, real and magnified image

Einverted and real image the same size as the object

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Question 1358

neco 2002

Which device does NOT make use of the magnetic effects of an electric current?

Ahot-wire ammeter

Bmoving-coil ammeter

Cmoving-coil loudspeaker

Dmoving-iron ammeter

Etelephone earpiece

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Question 1359

neco 2002

The energy stored in a capacitor of capacitance 5 μF is 40J. What is the voltage applied across its terminals?

A4V

B8V

C16V

D200V

E4000V

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Question 1360

neco 2002

Which is a fundamental unit?

Aampere

Bjoule

CNewton

Dohm

Ewatt

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Question 1361

neco 2002

An object 8cm in front of a plane mirror moves at a speed of 6cm s^-1 away from the mirror. What will be the distance separating the object and the image after 2s?

A8cm

B12cm

C20cm

D28cm

E40cm

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Question 1362

neco 2002

An electric heater takes 4A when operated on a 250V supply. What is the cost of the electricity consumed at 10k per kWh when the heater is used for 5 hours?

A10k

B50k

CN1.00

DN5.00

EN10.00

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Question 1363

neco 2002

Which colour is deviated least when white light passes through a triangular prism?

Agreen

Bindigo

Cred

Dviolet

Eyellow

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Question 1364

neco 2002

The ability of the eye to focus on objects at various distances is known as

Aaccommodation

Bastigmatism

Ceye ring

Dmyopia

Epresbyopia

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Question 1365

neco 2002

In an operating X-ray tube, a high p.d is applied between the cathode and the anode for the purpose of

Aaccelerating the electrons to a very high energy

Bconcentrating electrons on the target

Cheating the anode

Dheating the cathode

Eproducing a stream of electrons

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Question 1366

waec 2002

A nuclide X is produced by bombarding a nitrogen(N) nucleus with an alpha(\alpha\) particle with the release of heavy hydrogen(D) nucleus as shown by the following nuclear equation, \(\alpha + ^{14}_{7}N \to ^p_qX + ^2_1D\). Determine the values of p and q in the equation

A12 and 6

B14 and 7

C16 and 8

D19 and 8

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Question 1367

waec 2002

Which of the following materials is used to control the rate of neutron production in a nuclear reactor?

Aboron rods

Bconcrete shield

Cgraphite rods

Duranium rods

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Question 1368

waec 2002

Which of the following is usually used to cause fission in an atomic reactor?

AAlpha particles

Bbeta particles

Celectrons

DNeutrons

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Question 1369

waec 2002

If a radioactive atom emits a beta particle, Its mass number

Aincreases by one

Bremains the same

Cdecreases by one

Dincreases by two

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Question 1370

waec 2002

In a model of the hydrogen atom, the energy levels Wn are given by the formula Wn = -\(\frac{R}{n^2}\), where n is an integer and R is a constant. Determine the energy released in the transition from n = 3 to n = 2.

A\(\frac{R}{5}\)

B-\(\frac{R}{4}\)

C\(\frac{5R}{36}\)

D\(\frac{-5R}{36}\)

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