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49 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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49 questions

Question 1 of 20 49 total questions

Question 1

jamb 2000

A handbag containing some load weighing 162N is carried by two students each holding the handle of the bag next to him. If each handle is pulled \( 60^{\circ} \) to the vertical, find the force on each student's arm

A81N

B121N

C162N

D324N

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Question 2

jamb 2000

In the a.c circuit above, the current value is

A0.58 A

B3.00 A

C4.00 A

D6.67 A

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Question 3

jamb 2000

If current flows in the direction of the arrows in the solenoid above, the north pole is at

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Question 4

jamb 2000

The correct position for a fuse in the diagram above is

Abetween P and Q

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Question 5

jamb 2000

In the diagram above, the values of V1 and V2 are respectively

A1V and ¹/₃V

B¹/₃V and 1V

C¹/₃V and ²/₃V

D1V and ²/₃V

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Question 6

jamb 2000

In the diagram above a beam of white light travels from a rare to a dense medium. What colours of light do the rays a, b and c respectively represents?

Ared, green and blue

BGreen, red and blue

CYellow , blue and red

DBlue , yellow and red

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Question 7

jamb 2000

The diagram above shows two capacitors P and Q of capacitance 5μF and 10μF. Find the charges stored in P and Q respectively

A2μC and 4μC

B4μC and 2μC

C100μC and 200μC

D200μC and 100μC

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Question 8

jamb 2000

The diagram above shows a maximum and minimum thermometer divided into three portions P, Q and R. Which of the following is true about the respective content of P,Q and R

AAlcohol, mercury and alcohol

BAir, alcohol and mercury

CMercury, alcohol and mercury

DAir, mercury and alcohol

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Question 9

jamb 2000

An engineer intends to deviate a light ray from its path by 120^o through reflection from a plane mirror. Calculate the angle of incidence

A60^o

B40^o

C30^o

D20^o

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Question 10

jamb 2000

A transverse wave is applied to a string whose mass per unit length is 3 x 10-2kgm-1. If the string is under a tension 12N, the speed of the propagation of the wave is

A5 ms^-1

B20 ms^-1

C30 ms^-1

D40 ms^-1

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Question 11

jamb 2000

A travelling wave moving from left to right has an amplitude of 0.15m, a frequency of 550Hz and a wavelength of 0.01m. The equation describing the wave is

Ay = 0.15 sin 200π(x - 5.5t)

By = 0.15 sin π(0.01x - 5.5t)

Cy = 0.15 sin 5.5π(x - 200t)

Dy = 0.15 sin π(550x - 0.01t)

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Question 12

jamb 2000

A sonometer wire is vibrating at frequency fo. If the tension in the wire is doubled while the length and the mass per unit length are kept constant, the new frequency of vibration is

A^f_o/₂

B2f_o

C^f_o/_√2

Df_o√2

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Question 13

jamb 2000

A simple pendulum has a period of 17.0s. When the length is shorten by 1.5m, its period is 8.5s. Calculate the original length of the pendulum

A4.0 m

B3.0 m

C2.0 m

D1.5 m

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Question 14

jamb 2000

The velocity y of a particle in a time t is given by the equation
y = 10 + 2t\(^2\)
Find the instantaneous acceleration after 5 seconds

A60 ms^-2

B20 ms^-2

C15 ms^-2

D10 ms^-2

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Question 15

jamb 2000

Light of energy 5eV falls on a metal of work function 3eV and electrons are liberated. The stopping potential is

A1.7V

B2.0V

C8.0V

D15.0V

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Question 16

jamb 2000

A conductor of length 2m carries a current of 0.8A while kept in a magnetic field of magnetic flux density 0.5T. The maximum force acting on it is

A0.2N

B0.8N

C3.2N

D8.0N

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Question 17

jamb 2000

A cell of internal resistance 1Ω supplies current to an external resistor of 3Ω. The efficiency of the cell is

A25%

B33%

C50%

D75%

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Question 18

jamb 2000

A 2H inductor has negligible resistance and is connected to a 50/π Hz A.C. Supply. The reactance of the inductor is

A200 Ω

B50 Ω

C100/π Ω

D25/π Ω

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Question 19

jamb 2000

A certain radioactive source emits radiations that were found to be deflected by both magnetic and electric fields. The radiations are

Abeta rays

Bgamma rays

Cx-rays

Dultra-violet rays

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Question 20

jamb 2000

If the fraction of the atoms of a radioactive material left after 120years is 1/64, what is the half-life of the material?

A24 years

B20 years

C10 years

D2 years

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