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98 questions

Question 1 of 18 98 total questions

Question 41

jamb 2022

A cell whose internal resistance is 0.55\(\Omega\) delivers a current of 4 A to an external resistor. The lost voltage of the cell is?

A4.00 V

B2.20 V

C0.15 V

D8.00 V

View Explanation & Discuss

Question 42

jamb 2022

Which of the following is not a consequence of hydrogen bubbles covering the copper plate of a primary cell?

Aformation of hydrogen bubbles on the electrode

Bincrease in the resistance of the cell

Clocal action

Dpolarization

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Question 43

jamb 2022

The relationship between the coefficient of linear expansion \(\alpha\) and volumetric expansion (\(\gamma\)) is-----------------

A\(\gamma\) = \(\alpha ^{-3}\)

B\(\gamma\) = \(\alpha\)

C3\(\alpha\)

D\(\gamma\) = \(\alpha ^{3}\)

View Explanation & Discuss

Question 44

jamb 2022

A car starts from rest and covers a distance of 40 m in 10 s. Calculate the magnitude of its acceleration

A3.20 ms\(^{-2}\)

B0.25 ms\(^{-2}\)

C0.80 ms\(^{-2}\)

D4.00 ms\(^{-2}\)

View Explanation & Discuss

Question 45

jamb 2022

Tyres are treaded to?

Aincrease weight of tyres

Bincrease friction

Cincrease its longevity

Dlook good

View Explanation & Discuss

Question 46

jamb 2022

A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?

Athe magnet is moved towards the stationary solenoid

Bthere is no relative motion

Cthe magnet is moved away from the stationary solenoid

Dthe solenoid is moved away from the stationary magnet

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Question 47

jamb 2022

An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?

A15 cm

B70 cm

C40 cm

D40 cm

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Question 48

jamb 2022

Consider the wave equation y = 5mm sin [1cm\(^{-1}\)x - 60s\(^{-1}\)t]. The wave number is?

A0.1 cm\(^{-1}\)

B10cm\(^{-1}\)

C1.0cm\(^{-1}\)

D2cm\(^{-1}\)

View Explanation & Discuss

Question 49

jamb 2022

A bar magnet is divided into two pieces, which of the following statement is correct?

Atwo new magnets are created

Bthe magnetic field of each separate piece becomes stronger

Cthe electric field is created

Dthe bar magnet is demagnetized

View Explanation & Discuss

Question 50

jamb 2022

Which of these is a derived unit?

AKilogram

BMetre

CNewton

DSecond

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Question 51

jamb 2022

The refractive index of a medium is the ratio of

Aspeed of light in vacuum to speed in medium

Bspeed in medium to speed in vacuum

Cfrequency to wavelength

Dwavelength to frequency

Question 52

jamb 2022

The SI unit of electric current is the

Aampere

Bvolt

Ccoulomb

Dohm

Question 53

jamb 2022

Which device converts mechanical energy to electrical energy?

Acapacitor

Btransformer

Cmotor

Dgenerator

Question 54

jamb 2022

Sound waves are

Alongitudinal

Bstationary

Ctransverse

Delectromagnetic

Question 55

jamb 2022

Which is a scalar quantity?

Avelocity

Bdisplacement

Cdistance

Dforce

Question 56

jamb 2022

Light travels fastest in:

Awater

Bglass

Cvacuum

Dair

Question 57

jamb 2022

Current is measured using which device?

Avoltmeter

Bammeter

Cohmmeter

Dgalvanometer

Question 58

jamb 2022

Gravity on Earth is approximately:

A9.8 m/s??

B3.2 m/s??

C1.6 m/s??

D10.8 m/s??

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