Free Neco 2021 Physics Practical Questions and Answers

 

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Neco 2021 Physics Practical (Obj/Essay) Questions and Answers

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(1xii)

(i) I avoided errors due to parallax when reading the meter rule

(ii) I avoided zero error on the stop clock

(1b)

(i)Period refers to the amount of time it takes a wave to complete one full cycle of oscillation or vibration. Frequency, on the contrary, refers to the number of complete cycles or oscillations that occur per second. The period is a quantity related to time, whereas frequency is related to rate. Period simply refers to the time for something to occur periodically, whereas frequency means how often that happens.

(1bii)

E= 25J

Extension= 6.7x10-²m

Force constant (k) = ?

E= 1/2ke²

2E = ke²

k = 2E/e²

k = 2x 25/(0.067)²

k = 50/0.00449

k = 11135.9Nm-¹

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(3a)

(xii)

(i)I ensured tight connections on all terminals

(ii) I avoided error due to parallax on the ammeter

(3bi)Period refers to the amount of time it takes a wave to complete one full cycle of oscillation or vibration. Frequency, on the contrary, refers to the number of complete cycles or oscillations occur per second. Period is a quantity related to time, whereas frequency is related to rate. Period simply refers to the time for something to occur periodically, whereas frequency means how often that happens.

(3bi)

(i)Free electrons

(ii)Protons and Electron

(iii)Electrons and ions

bi) A real image is formed outside the system, where the emerging rays actually cross; such an image can be caught on a screen or piece of film and is the kind of image formed by a slide projector or in a camera.

The image developed by a plane mirror is virtual and laterally inverted.

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