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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 1011

jamb 2008

A block of aluminum is heated electrically by a 25 W heater. if the temperature rises by 10°C in 5 minutes, the heat capacity of the aluminum is?

A850 JK^-1

B750 JK^-1

C650 JK^-1

D500 JK^-1

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Question 1012

jamb 2008

A sealed flask contains 600cm3 of air at 27°C and is heated to 35°C at constant pressure. The new volume is?

A508 cm³

B516 cm³

C608 cm³

D616 cm³

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Question 1013

jamb 2008

During summer, the balance wheel of a clock expands.what effect does this have on the accuracy of the clock?

Athe clock gians time

Bthe accuracy of the clock is not affected

Cthe clock losses time

Dthe clock stops working

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Question 1014

jamb 2008

The thermometric properties of a thermocouple is the change in?

Aequivalent resistance

Belectromotive force

Ccolour

Dpressure

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Question 1015

jamb 2008

An empty density bottle weighs 2 N. if it weighs 5 N when filled with water and 4 N when filled with olive oil, the relative density of olive oil is?

A(1)/3

B(2)/3

C(1)/5

D(2)/5

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Question 1016

jamb 2008

When cold water is poured on a can containing hot water, the can collapses because the?

Asteam condeses and occupies the partial vacuum in the can

Bexternal air pressure counter balances the pressure within the can

Csteam expands to occupy the vacuum remaining in the can

Dexternal pressure becomes greater than the pressure within the can.

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Question 1017

jamb 2008

In the hare's apparatus, water rises to a height of 26.5 cm in one limb. if a liquid rises to a height of 20.4 cm in the other limb, what is the relative density of the liquid?

A0.8

B1.1

C1.2

D1.3

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Question 1018

jamb 2008

A spring of force constant 500 Nm\(^{-1}\) is compressed such that its length shortens by 5cm. The energy stored in the spring is?

A0.625 J

B6.250 J

C62.500 J

D625.000 J

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Question 1019

jamb 2008

A motorcycle of mass 100kg moves round in a circle of radius 10m with a velocity of 5 ms\(^{-1}\). find the coefficient of friction between the road and the tyres.

A25.00

B2.50

C0.50

D0.25

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Question 1020

jamb 2008

Counting of currency notes with moist fingers is based on the principles of?

Adiffusion

Bcohesion

Cadhesion

Dviscosity

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Question 1021

jamb 2008

If a body mass 5kg is thrown vertically upwards with velocity u,at what height will the potential energy equal to the kinetic energy?

Ah =(u)²/g

Bh = (u)²/4g

Ch = (2u)²/g

Dh = (u)²/2g

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Question 1022

jamb 2008

What is the frequency of vibration if the balance wheel of a wrist watch makes 90 revolutions in 25 s?

A0.01 Hz

B0.04 Hz

C2.27 Hz

D3.60 Hz

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Question 1023

jamb 2008

I. All the three forces must be concurrent.
II. The upward force is equal to the downward force.
III. The algebraic sum of the moment about any point must be zero.

which of the above conditions must hold for a body acted upon by a system of three coplanar forces equilibrium?

AI and II only

BI and III only

CII and III only

DI, II and III

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Question 1024

jamb 2008

If a wheel 1.2 m in diameter rotates at one revolution per second, calculate the velocity of the wheel.

A3.6 ms^-1

B3.77 ms^-1

C4.0 ms^-1

D7.5 ms^-1

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Question 1025

jamb 2008

Which of the following is NOT a vector quantity?

Aaltitude

Bacceleration

Cdisplacement

Dweight

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Question 1026

jamb 2008

I. Force (N)
II.Torque (Nm)
III. Current (A)
IV. Power (W)
Which of the above are the correct S. I: units of the quantities indicated?

AI and II only

BI and III only

CI, II and III only

DI, II, III and IV only

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Question 1027

waec 2007

Calculate the effective resistance between P and Q in the diagram above

A0.75\(\Omega\)

B4.00\(\Omega\)

C5.00\(\Omega\)

D7.00\(\Omega\)

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Question 1028

waec 2007

The diagram above illustrates three forces acting on an object at point O. If the object is in equilibrium, determine the magnitude of the force P.

A10.5N

B11.0N

C17.3N

D20.0N

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Question 1029

waec 2007

There is always an uncertainty involved in any attempt to measure the position and momentum of an electron simultaneously. This statement is known as the

Ade Broglie's law

BHeisenberg uncertainty principle

CFranck-Hertz experimental law

Dwave-particle paradox

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Question 1030

waec 2007

The correct sequence of energy transformation in the operation of an x-ray tube is i. X-rays ii. Kinetic energy of thermo electrons iii. Potential energy of the target atoms iv. Heat energy of the emitted electrons

Aiv, iii, ii, i

Bii, iv, iii, i

Civ, ii, iii, i

Diii, iv, ii, i

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