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137 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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137 questions

Question 1 of 20 137 total questions

Question 21

waec 2018

A body is projected with an initial velocity u at angle \(\theta\) to the horizontal. If \(R_{max}\) is the maximum range of the projectile, what does the relation \(\frac{u^{2}}{R_{max}}\) represent?

AThe vertical distance covered

BAcceleration due to gravity

CThe horizontal distance covered

DThe acceleration of the body

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Question 22

waec 2018

Which of the following quantities are dimensionally independent?

I. Dielectric constant II. Momentum III. Efficiency IV. Refractive index

AI and II

BII, III and IV

CI, II, III and IV

DI, III and IV

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Question 23

waec 2018

A block is acted upon by TWO horizontal forces as illustrated in the diagram above. The block accelerates at 1.5\(ms^{-2}\). Calculate the mass of the block.

A6kg

B9kg

C10kg

D15kg

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Question 24

waec 2018

A body of mass m moving around a circle of radius r with a uniform speed v experiences a centripetal force F. The work done by the centripetal force on it is

AFv

Bzero

CFmr

D\(\frac{Fr}{m}\)

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Question 25

waec 2018

A dam is able to hold a large quantity of water because its wall is

Athickest at the top

Bthickest at the middle

Cthickest at the bottom

Dof the same thickness throughout

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Question 26

waec 2018

During a training session, two footballers pass a ball repeatedly between each other. The 'to and fro' motion of the ball is not simple harmonic because the

I. Acceleration of the ball is not directed towards a fixed point

II. Restoring force is not directed towards the centre

III. Acceleration of the ball is not directly proportional to the displacement from a fixed point

Which of the statements above are correct?

AI and III only

BI and II only

CII and III only

DI, II and III

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Question 27

waec 2018

The property of a body to remain at rest or to continue in uniform motion in a straight line is called

Amomentum

BInertia

Cimpulse

DEnergy

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Question 28

waec 2018

The diagram above illustrates a simple barometer. Which distance measures the atmospheric pressure?

APQ

BQR

CRS

DQS

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Question 29

waec 2018

The general definition of elastic modulus is

A\(\frac{stress}{strain}\)

B\(\frac{strain}{stress}\)

C\(stress \times strain\)

D\(\sqrt{\frac{stress}{strain}}\)

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Question 30

waec 2018

The S.I unit for sound energy is

AHz

Bcd

CdB

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Question 31

jamb 2018

The critical angle for light traveling from a transparent medium to air s measured as 34º. The refractive index of the medium is

A0.56

B1.50

C1.79

D2.02

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Question 32

jamb 2018

A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 340ms\(^-1\), how far is he from the hill?

A66m

B136m

C264m

D528m

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Question 33

jamb 2018

A solid weighs 45N and 15N respectively in air and water. Determine the relative density of the solid

A0.33

B0.50

C1.50

D3.00

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Question 34

jamb 2018

A resistor connected to a 12V battery draws a current of 2A. The energy dispatched in the resistor in 5 minutes is ___.

A3,600J

B6,000J

C7,200J

D14,400J

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Question 35

jamb 2018

When a known standard resistor of 2.0 is connected to the 0.0cm end of a metre bridge, the balance point is found to be at 55.0cm

A1.10Ω

B1.64Ω

C2.44Ω

D27.50Ω

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Question 36

jamb 2018

The photo cell works on the principle of the

AVoltaic cell

BEmission of electron by incident radiation

CEmission of protons by incident radiation

DPhotographic plate

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Question 37

jamb 2018

A lens of focal length 15cm forms an erect image which is three times the size of the object. The distance between the object and the image is ___.

A10cm

B20cm

C30cm

D40cm

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Question 38

jamb 2018

The image of an object is located 6cm behind a convex mirror. If it's magnification is 0.6, calculate the focal length of the mirror

A3.75cm

B6.70cm

C10.00cm

D-15.00cm

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Question 39

jamb 2018

If the focal length of a camera is 20cm, the distance from the film at which the lens must be set to produce a sharp image of 100cm away is

A17cm

B20cm

C25cm

D100cm

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Question 40

jamb 2018

Electrical power is transmitted at a high voltage rather than a low voltage because the amount of energy loss is due to

AHeat dissipation

BProduction of eddy currents

CExcessive current discharge

DExcessive voltage discharge

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