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50 questions

Question 1 of 20 50 total questions

Question 1

jamb 2005

A motorcyclist traveling at 30ms\(^{-1}\) starts to apply his brakes when he is 50m from the traffic light that had just turned red. If he reached the traffic light, his decceleration is

A18 ms\(^{-2}\)

B10 ms\(^{-2}\)

C9 ms\(^{-2}\)

D5 ms\(^{-2}\)

View Explanation & Discuss

Question 2

jamb 2005

The amount of energy released when 0.5kg of uranium is burnt completely is [c = 3 x 10\(^8\)m/s]

A1.5 x 10\(^8\)J

B4.5 x 10\(^8\)J

C1.5 x 10\(^{16}\)J

D4.5 x 10\(^{16}\)J

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Question 3

jamb 2005

In the photoelectric effect, which of the following graphs correctly represents the graph of stopping potential Vo against frequency,f, of incident light?

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Question 4

jamb 2005

An elastic material has a length of 36cm when a load of 40N is hung on it and a length of 45cm when a load of 60N is hung on it. The original length of the string is

A12cm

B20cm

C18cm

D15cm

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Question 5

jamb 2005

If two inductors of inductances 3H and 6H are arranged in series, the total inductance is

A9.0H

B18.0H

C0.5H

D2.0H

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Question 6

jamb 2005

A force of 200N acts between two objects at a certain distance apart. The value of the force when the distance is halved is

A400N

B200N

C100N

D800N

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Question 7

jamb 2005

The velocity of sound in air will be doubled if it's absolute temperature is

AQuadrupled

BConstant

CHalved

DDoulbed

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Question 8

jamb 2005

If the distance between two point charges its increased by a factor of four, the magnitude of the electrostatic force between them will be

A¹/₄ of its former value

B¹/₁₆ of its former value

C¹/₂ of its former value

D4 times its former value

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Question 9

jamb 2005

The figure above shows three capacitors, 2μF, 3μF and 6μF connected in series. If the p.d across the system is 12V, the p.d, across the 6μF capacitor is

A4V

B12V

C2V

D6V

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Question 10

jamb 2005

10⁶J of heat is required to boil off completely 2kg of a certain liquid. Neglecting heat lost to the surroundings, the latent heat of vaporization of the liquid is

A2.0 x 10⁶J kg^-1

B5.0 x 10⁶J kg^-1

C2.0 x 10⁵J kg^-1

D5.0 x 10⁵J kg^-1

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Question 11

jamb 2005

Two liquids L₁ and L₂ are contained in a U - tube. The height and the density of L₁ are 8 cm and 10³ kgm^-3 respectively. If the density of L₂ is 800 kgm^-3, its height measured from the same level is

A8 cm

B10 cm

C16 cm

D12 cm

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Question 12

jamb 2005

\( ^{235} _{92}U + ^1 _0n → ^{144} _{56}Ba + ^{90} _{36}Kr +2X \)

In the reaction above, X is

Aelectron

Bproton

Cneutrino

Dneutron

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Question 13

jamb 2005

In the circuit diagram of a transistor above, the terminal P, Q and R represent

AEMITTER, BASE and COLLECTOR

BCOLLECTOR, EMITTER and BASE

CBASE, COLLECTOR and EMITTER

DBASE, ENITTER and COLLECTOR

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Question 14

jamb 2005

In the figure above, the work done by the force of 100N inclined at an angle of 60^o to the object dragged horizontally to a distance of 8m is

A800J

B600J

C100J

D400J

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Question 15

jamb 2005

If the system above is in equilibrium, the tension in the string Q is

A11N

B9N

C4N

D6N

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Question 16

jamb 2005

In the figure above, the coefficient of static friction is 0.5. If the tension in the string is T, the acceleration of the system in motion is

A5 ms^-2

B15 ms^-2

C3 ms^-2

D9 ms^-2

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Question 17

jamb 2005

The value of F in the figure above when in equilibrium is

A10N

B12N

C20N

D27N

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Question 18

jamb 2005

The figure above shows a plot of angles of deviation through a glass prism when light is incident at θ degrees on the prism. The incident angle that produces the minimum deviation is

A20^o

B18^o

C35^o

D25^o

View Explanation & Discuss

Question 19

jamb 2005

The resistance of a piece of wire of length 20m has crossed-sectional area 8 x 10\(^{-6}\)m\(^2\)is?
[Resistivity of the wire = 4 x 10\(^{-7}\) Ω m]

A5.0 Ω

B0.5 Ω

C10.0 Ω

D1.0 Ω

View Explanation & Discuss

Question 20

jamb 2005

Two charged particles are projected into a region where there is a magnetic field perpendicular to their velocities. if the charges are deflected in opposite directions, which of the following statements is true of the charge?

Athe charge must be of opposite sign

Bpositive charges are more in number

Cthe charges are electrically neutral

Dthe charges are of the same sign

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