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65 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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65 questions

Question 1 of 20 65 total questions

Question 11

jamb 2015

The two liquids which are often used in thermometer on experiment basic is known as

AMercury only

BAlcohol and Water

CMercury and Alcohol

DAlcohol only

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Question 12

jamb 2015

Transformers are designed so that energy losses are reduced to a minimum. This is achieved through which of these process?

I. Using a soft iron ore
II. Laminating the iron core to reduce energy loses due to eddy current
III. Designing an efficient iron core

AI & II only

BII only

CI, II, & III only

DIII only

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Question 13

jamb 2015

Which of the following will increase the boiling point of water?

I. Taking it to a high altitude
II. Dissolving a salt into it
III. Heating it in a sealed flask
IV. Increasing the rate of heat supply

.

AI only

BIII & IV only

CII & III only

DII only

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Question 14

jamb 2015

The strength of an electromagnet increases with

AIncreases in the number of turn of the coil

BDecreases in current with the coil

CIncreases in the distance between the pole

DIncreases in current without the coil

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Question 15

jamb 2015

A radioactive source emits X–rays of very short wavelength (10\(^{-13}\)m ). What is the frequency of these rays?

A2 × 10¹⁸HZ

B3 × 10 ¹⁹HZ

C3 × 10²¹HZ

D3 × 10^-19HZ

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Question 16

jamb 2015

The symbol ₋₁⁰X used to represent which of the particles?

AProton

BNeutron

CElectrons

DAtoms

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Question 17

jamb 2015

The optical instrument which is suitable for viewing a nearby objects is ………..?

ATelescope

Bsextant

Cmicroscope

Dperiscope

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Question 18

jamb 2015

If an object whose mass is 3kg moves in a circular path of a radius 0.7m, records a speed at 2m/s. What is the result of the angular velocity?

A4 rads^–1

B1rads–1^–1

C3^–1rads–1

D4rads–1^–1

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Question 19

jamb 2015

A structural engineer stood on a top of a building releasing a light and heavy object to the ground which of the following statement is true?(Neglect Air Resistance)

ABoth the light and heavy subject reach the ground at the same time

BThe light object get to the ground first before the heavy object

CThe heavy object to the ground first before the light object

DNone get to the ground first

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Question 20

jamb 2015

For a best result using temperature to achieve an accurate measurement, it is best to use

AMercury thermometer

Bgas thermometer

Cclinical thermometer

Dalcohol thermometer

View Explanation & Discuss

Question 21

jamb 2015

If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT?

A4:01

B1:04

C5:01

D2:01

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Question 22

jamb 2015

If the velocity ratio of a machine is 5. What is its ratio of x and y?

A2 : 5

B1 : 5

C5 : 1

D3 : 1

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Question 23

jamb 2015

If a ball released from a height of 20m, How long would it take the ball to reach the ground? (assures g = 10m/s)

A2sec

B3sec

C35sec

D2.4sec

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Question 24

jamb 2015

A zinc has a heat capacity of 40 J/K, what is the mass of the zinc, given that the specific heat of zinc is 380 J/kg k

A0.11kg

B0.12kg

C0.13kg

D0.14kg

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Question 25

jamb 2015

If a mango fruit dropped at a height of 50 meters. How long does it reach the ground? (take g = 10m/s²)

A2 sec

B3 sec

C4sec

D3.2sec

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Question 26

jamb 2015

What type of electromagnetic radiation can be used to take photographs in the haze?

ARadio waves

Binfrared rays

CVisible light

DGamma rays

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Question 27

jamb 2015

Lodestone is a natural magnet, it points at

AN – W when suspended freely

BN–S when suspended freely

CS – E when suspended freely

DS–W when suspended freely

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Question 28

jamb 2015

Quantities of heat Q can be measured using a container called

AThermometer

BMeasuring cylinder

CCalorimeter

DMeter rule

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Question 29

jamb 2015

Heat transfer in the surrounding without a material medium is possible through?

AConduction

BConvection

CRadiation

DExpansion

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Question 30

jamb 2015

The device in which one circuit controls another, especially if the current in the second circuit is large or dangerous is known as

AElectromagnetic devices

BMagnetic relay device

CNone at all

DSextant

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