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104 questions

Question 1 of 20 104 total questions

Question 21

jamb 2025

A circular parallel plate capacitor with radius 6cm is separated by 0.12cm. Calculate the capacitance of the capacitor [\(\pi\) = 3.142, ε\(_0\) = 8.85 x 10\(^{-12}\)Nm\(^2\)C\(^2\)]

A4.3 x 10\(^{-11}\)F

B5.1 x 10\(^{11}\)F

C8.3 x 10\(^{-11}\)F

D9.6 x 10\(^{-11}\)F

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Question 22

jamb 2025

The resultant of the force shown above is

A18.00N

B5.00N

C10.20N

D3.15N

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Question 23

jamb 2025

A concave mirror of focal length 20cm produces an erect image that is four times the object, the object distance from the mirror is

Aless than 20cm

BBetween 20cm and30cm

CBetween 30cm and 40cm

DGreater than 40cm

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Question 24

jamb 2025

The operation of a photovoltaic cell is possible by the action of

ASemi-conductor

BConductors

CChemical

DInsulators

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Question 25

jamb 2025

What happens to the speed of sound in air when the pressure increases at a constant temperature

AUnchanged

BIncrease

CReduce

DVaries

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Question 26

jamb 2025

From the diagram above, the sine of the angle of refraction in glass is

A0.4

B0.3

C0.2

D0.1

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Question 27

jamb 2025

From the above figure, a uniform meter rule is suspended by two cords from a height. Calculate T?

A11.25N

B14.8N

C19.24N

D16.77N

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Question 28

jamb 2025

Standing waves are produced by

AWaves that vibrate in a vertical plane(standing upright)

BThe motion of the source toward the observer

CThe motion of the source away from the observer

Dwaves that reflect off a boundary and interfere with themselves

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Question 29

jamb 2025

What pressure would a 5000N weight of water exert at the bottom of a reservoir containing it if its length and breadth are 10m and 5m, respectively

A200Pa

B182Pa

C100Pa

D120Pa

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Question 30

jamb 2025

From the above circuit, calculate the impedance ((\(\pi\) = \(\frac{22}{7}\), f = 50Hz)

A86.7\(\Omega\)

B163.5\(\Omega\)

C204.8\(\Omega\)

D16.3\(\Omega\)

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Question 31

jamb 2025

The dimensional symbol of tension in a string is expressed as

AL T\(^{-2}\)

BM\(^2\) L\(^{-1}\) T\(^{-2}\)

CM L T\(^2\)

DM L T\(^{-2}\)

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Question 32

jamb 2025

A 5 \(\mu\) positively charged particle is moving at 45º to the direction of magnetic field with 3 x 10\(^4\)m/s speed. If it experiences a force of 6N, what is the value of the flux density of the field?

A107.23T

B75.76T

C98.44T

D56.57T

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Question 33

jamb 2025

Calculate the depth of a swimming pool if the apparent depth is 10cm(refractive index of water is 1.33)

A7.5cm

B10.0cm

C13.3cm

D6.87cm

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Question 34

jamb 2025

In an A.C circuit, the instantaneous current is 7A. What is the root mean square(r.m.s) value of the current I\(_{r.m.s}\)

A5A

B6A

C3A

D4A

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Question 35

jamb 2025

Which of the following is better for measuring a very small resistance?

AVoltmeter

BWheatstone bridge

Crheostat

DPotentiometer

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Question 36

jamb 2025

The quantity of heat required to convert 5kg of ice at its melting point to water without a change of temperature is

AHeat capacity

Bspecific latent heat of fusion

CSpecific heat capacity

DLatent heat of fusion.

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Question 37

jamb 2025

A wire of radius 0.3cm is used to lift a block of 1.5kg. Calculate the stress introduced into the wire [ take g = 10m/s\(^2\)]

A53 x 10\(^{-4}\)Nm\(^{-2}\)

B5.3 x 10\(^{-4}\)Nm\(^{-2}\)

C53 x 10\(^4\)Nm\(^{-2}\)

D5.3 x 10\(^4\)Nm\(^{-2}\)

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Question 38

jamb 2025

Which of the following electromagnetic spectra has the shortest wavelength?

AUltra violet radiation

BX - rays

CVisible light

DInfrared

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Question 39

jamb 2025

Calculate the heat capacity of a material that absorbs 48KJ of heat at a differential temperature of 53ºC

A760.8JK\(^{-1}\)

B2500JK\(^{-1}\)

C905.7JK\(^{-1}\)

D260.5JK\(^{-1}\)

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Question 40

jamb 2025

Copper of 0.2g and silver of 1.2g are deposited when current is passed through copper and silver voltameter. Calculate the electrochemical equivalent, Z of silver if that of copper is 0.00028gC\(^{-1}\)

A1.68 x 10\(^{-3}\)gC\(^{-1}\)

B2.34 x 10\(^{-3}\)gC\(^{-1}\)

C2.80 x 10\(^{-3}\)gC\(^{-1}\)

D3.34 x 10\(^{-3}\)gC\(^{-1}\)

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