Physics Past Questions

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4656

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

A. two new magnets are created
B. the magnetic field of each separate piece becomes stronger
C. the electric field is created
D. the bar magnet is demagnetized

View Answer & Discuss (4) JAMB 2022

4657

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

A. 0.1 cm\(^{-1}\)
B. 10cm\(^{-1}\)
C. 1.0cm\(^{-1}\)
D. 2cm\(^{-1}\)

View Answer & Discuss (16) JAMB 2022

4658

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?

A. 15 cm
B. 70 cm
C. 40 cm
D. 40 cm

View Answer & Discuss (5) JAMB 2022

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4659

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?