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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 1051

jamb 1986

Which of the following assumptions is made in a simple pendulum experiment? the

Asuspending string is inextensible

Bbob has a finite size

Cbob has a definite mass

Dinitial angle of oscillation must be large

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Question 1052

jamb 1986

A ball is thrown vertically into the air with an initial velocity u. What is the greatest height reached?

Au2g

B\(\frac{3u^2}{2g}\)

C\(\frac{u^2}{g}\)

D\(\frac{u^2}{2g}\)

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Question 1053

jamb 1986

Which of the following is in a neutral equilibrium?

Aa heavy weight suspended on a string

Ba cone resting on its slant edge

Ca heavy-based table lamp

Dthe beam of a balance in use

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Question 1054

jamb 1986

Two objects, one having three times the mass of the other, are dropped at the same time from a tall building. When they are above the ground, the two objects will have the same?

AMomentum

BKinetic energy

CPotential energy

DAcceleration

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Question 1055

jamb 1986

Which of the following is a derived unit?

AKilogramme

BMeter

CKelvin

DNewton

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Question 1056

jamb 1986

A heavy object is suspended from a string and lowered into water so that it is completely submerged. The object appears lighter because

Athe density of water is less than that of the object

Bthe pressure is low just below the water surface

Cit experiences an upthrust

Dthe tension in the string neutralizes part of the weight

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Question 1057

jamb 1986

Which of the following represents the correct precision if the length of a piece of wire is measured with a meter rule?

A35mm

B35.0mm

C35.00mm

D35.01mm

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Question 1058

jamb 1985

In the Fig above, MN is a light uniform meter rule pivoted at O, the 80cm mark. A load of mass 3.00kg is suspended on the meter rule at L, the 10cm mark. If the rule is kept in equilibrium by a string RP, fixed at P and attached to the rule at R, the 20cm mark, then the Tension T on the string is?

A3.0N

B3.4N

C3.5N

D6.0N

E7.0N

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Question 1059

jamb 1985

The graph in the fig above describes the motion of a particle. the acceleration of the particle during the motion is

A0.00ms^-2

B0.25ms^-2

C4.00ms^-2

D8.00ms^-2

E10.00ms^-2

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Question 1060

jamb 1985

In the Fig above, Current I passes through the combination, if the power dissipated in the 5 ohm resistor is 40W, then the power dissipated in the 10 ohm resistor is

A10W

B20W

C40W

D80W

E100W

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Question 1061

jamb 1985

Normal atmospheric pressure at sea-level is 10⁵Nm^-2 and the acceleration due to gravity is approximately 10ms^-1. If the atmosphere has a uniform density of 1kgm^-3, its height is

A100m

B1000m

C10 000m

D100 000m

E1000 000m

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Question 1062

jamb 1985

What is the number of neutrons in the Uranium isotope \(^{238}_{92}X\)?

A92

B146

C238

D330

E119

View Explanation & Discuss

Question 1063

jamb 1985

Which of the following features is NOT a characteristic of natural radioactivity?

ARadioactivity is a nuclear phenomenon

BRadioactivity is exhibited only by elements of mass number greater than 206

CThe radioactivity of an element is affected by electric and magnetic fields in the surroundings

DRadioactive substances emits three types of radiations, a-rays, \(\beta\)-rays and y-rays

EThe radioactive element is transformed into a new element

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Question 1064

jamb 1985

Which of the following statements about electrolysis is NOT correct?

AThe substances in solution in the electrolyte become ionized

BIons are electrically charged and are attracted towards electrodes when a potential difference is applied

CIons may be discharged at the electrodes, forming bubbles or deposits

DThe mass deposited depends upon the length of time for which current flows

EThe mass of gas set free or metal deposited is proportional to the square of the current

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Question 1065

jamb 1985

A transformer has a primary coil with 500 turns and a secondary coil with 2500 turns. When the voltage input to the primary coil is 120V, the output is

A6000V

B600V

C240V

D60V

E24V

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Question 1066

jamb 1985

Which of the following statements is NOT correct?

AA galvanometer can be converted to an ammeter with a different range by connecting a high resistance in series

BAn electric current always produces a magnetic field

CMaxwell's screw rule states that if a corkscrew moves inthe direction of the current, the hand turns in the direction of the lines of force

DElectromagnets are used in electric bells and telephone recievers

EThe lines of force round a straight current carrying conductor are circular

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Question 1067

jamb 1985

On which of the following does the operation of a moving coil ammeter depend? i. Electromagnetic induction ii. Force on a carrying-current conductor iii. Magnetic effect of an electric current

Ai only

Bii only

Ciii only

Dii and iii only

Ei,ii and iii

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Question 1068

jamb 1985

An electric kettle, connected to a 240V mains, produces 6.0 x 10⁵J of heat energy to boil a quantity of water in 5 minutes. Find the resistance of the kettle.

A14.4\(\Omega\)

B28.8\(\Omega\)

C144\(\Omega\)

D288\(\Omega\)

E2880\(\Omega\)

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Question 1069

jamb 1985

A wire P has half the diameter and half the length of a wire Q of similar material. The ratio of the resistance of P to that of Q is

A8 : 1

B4 : 1

C2 : 1

D1 : 1

E1 : 4

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Question 1070

jamb 1985

Which of the following will convert a milliammeter to a voltmeter?

Alow series resistance

Blow parallel resistance

Chigh series resistance

Dhigh parallel resistance

Eparallel resistance equal to milliammeter resistance

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