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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 741

jamb 2013

When a charge moves through an electric circuit in the direction of an electric force, it

Agains both potential and kinetic energy

Bgains potential energy and lose kinetic energy

Closes potential energy and gains kinetic energy

Dloses both potential and kinetic energy

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Question 742

jamb 2013

An electric device is rated 2000W, 250V. Calculate the maximum current it can take

A9A

B8A

C7A

D6A

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Question 743

jamb 2013

A house has ten 40W and five 100W bulbs. How much will it cost the owner of the house to keep them lit for 10 hours if the cost of a unit is 5N?

AN90

BN50

CN45

DN5

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Question 744

jamb 2013

Which of the following obeys ohms laws?

Aelectroytes

Bmetals

Cdiode

Dglass

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Question 745

jamb 2013

A cell of emf 1.5V is connected in series with a 1Ω resistor and a current of 0.3A flows through the resistor. Find the internal resistance of the cell

A4.0Ω

B3.0Ω

C1.5Ω

D1.0Ω

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Question 746

jamb 2013

Capacitors are used in the induction coil to

Acontrol circuits

Bprevent distortion of electric fields

Cprevent electric sparks

Ddissipate energy

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Question 747

jamb 2013

Calculate the force acting on an electron of charge 1.5 x 10^-19C placed in an electric field of intensity 10⁵Vm^-1

A1.5x10^-11N

B1.5x10^-12N

C1.5x10^-13N

D1.5x10^-14N

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Question 748

jamb 2013

The angle of deviation of light of various colours passing through a triangular prism increases in the order

Ared → green → blue

Bgreen → violet → blue

Cblue → red → green

Dblue → green → red

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Question 749

jamb 2013

If the linear magnification of the objective and eyepiece convex lenses of a compound microscope are 4 and 7 respectively. Calculate the angular magnification of the microscope

C11

D28

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Question 750

jamb 2013

Total internal reflection will not occur when light travels from

Awater to air

Bwater into glass

Cglass to air

Dglass into water

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Question 751

jamb 2013

A ray of light passing through the centre of curvature of a concave mirror is reflected by the mirror at?

A0^o

B45^o

C90^o

D180^o

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Question 752

jamb 2013

A man 1.5m tall is standing 3m in front of a pinhole camera whose distance between the hole and the screen is 0.1m. What is the height of the image of the man on the screen?

A0.05m

B0.15m

C0.30m

D1.00m

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Question 753

jamb 2013

If a sonometer has a fundamental frequency of 450HZ, what is the frequency of the fifth overtone?

A2700Hz

B456Hz

C444Hz

D75Hz

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Question 754

jamb 2013

What is the velocity of sound at 100 oC if the velocity of sound at 0 oC is 340ms -1?

A497m^-1

B440m^-1

C397m^-1

D240m^-1

View Explanation & Discuss

Question 755

jamb 2013

A transverse wave and a longitudinal wave travelling in the same direction in a medium differ essentially in their

Afrequency

Bamplitude

Cdirection of vibration of the particles of the medium

Dperiod of vibration of the particles of the medium

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Question 756

jamb 2013

A wave that travels through stretched strings is known as

Aelectromagnetic wave

Bmicro wave

Cmechanical wave

Dseismic wave

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Question 757

jamb 2013

The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is

Acovection

Bconduction

Cradiation

Ddiffusion

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Question 758

jamb 2013

The rise or fall of a liquid in a narrow tube is because of the

Aviscosity of the liquid

Bsurface tension of the liquid

Cfriction between the walls of the tube and the liquid

Dosmotic pressure of the liquid

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Question 759

jamb 2013

What will happen to the boiling point of pure water when it is heated in a place 30m below sea level?

AIt will be more than 100 ^oC

BIt will be last than 100 ^oC

CIt will still be at 100 ^oC

DIt will be fluctuating

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Question 760

jamb 2013

Steam from boiling water causes more damage on the skin than does boiling water because

Awater has a high specific heat

Bsteam has latent heat of fusion

Cthe steam is at a highter temperature than the water

Dsteam brings heat more easily by convection

View Explanation & Discuss

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