Neco physics answers 2021

Neco physics answers 2021

Here is the Neco physics answers for 2021, stay tuned for more updates

1BCEDBEDBBD

11DEDCAEDCEB

21DDBBCBDBDC

31BEDBBCAEDD

41EDACEECCED

51DCECECDBCB

(1a)

(i) A multimeter

(ii) Reads if there is short circuit in the electric circuit

(1b)

(i)A simple microscope uses one lens while a compound microscope uses two lens

(ii)A compound microscope produces a higher magnification than that of simple microscope

(1c)

Using M= ZIt

I = M/Zt

I = 450/3.30*10-⁴ *25*60

I = 9094

(3a)

Range (R) is defined as the horizontal distance from the point of projection to the point where the projectile hits the projection plane again

(3b)

Time of flight: T= 2usinθ/g

sinθ = Tg/2u = 1.5*10/2*12

sinθ = 15/24 = 0.625

θ = sin-¹(0.625)

θ = 38.7°

(4a)

(i)Flying bullet

(ii)A moving car

(4b)

mgh = mc∆θ

∆θ = gh/c = 10*108/4200

= 0.257°C or 0.257K

 

(6a)

A stationary wave is produced by a superposition of two waves of the frequency and amplitude which are exactly out of phase with each other

(6b)

Wavelength = 4/2.5 = 1.6m

(5a)

Vaporization is the conversion of a substance from the liquid or solid phase into the gaseous (vapour) phase.

See also  How To Check Your NECO result 2021

(5b)

(i) Deform

(ii) No change

6a)

A wave front is the locus of points characterized by

propagation of position of the same phase: a propagation

of a line in 1D, a curve in 2D or a surface for a wave in

3D. In other words a line or surface in the path of an

advancing wave on which all the particles are vibrating in

phase is called a wave front.

(1b)

Tabulate

– Simple Microscope it is used for reading small prints and for studying biological specimens.

– The magnifying glass or simple microscope is a convex lens which is used to produce magnified images of small object.

– When a converging lens is used as a simple microscope the object is placed between the principal focus and the optical center of the lens.

– The Compound microscope consists of two converging lenses of short focal lengths.

– To produce a higher magnification that obtained from a simple microscope.

(1c)

A simple microscope uses the optical power of single lens or group of lenses for magnification *While*; A compound microscope uses a system of lenses (one set enlarging the image produced by another) to achieve much higher magnification of an object

See also  NECO ANIMAL HUSBANDRY PRACTICAL ANSWERS 2021

(8a)

*Lost volt:* The potential difference between the two terminals of a cell decrease by an amount that does not contribute to the circuit, is called lost volt.

(3a)

The range of the projectile is the displacement in the horizontal direction. There is no acceleration in this direction since gravity only acts vertically. shows the line of range. Like time of flight and maximum height, the range of the projectile is a function of initial speed.

12ai)

Fundamental quantity: quantities which are independent on other physical quantity. eg length, mass, time, current, amount of substance, luminous intensity, thermodynamic temperature

13a

*Elastic Collision*

An elastic collision can be defined as a state where there is no net loss in kinetic energy in the system as the result of the collision.

See also  NECO GCE EXAM DATE CHANGED

*Inelastic Collision*

An inelastic collision can be defined as a type of collision where this is a loss of kinetic energy. The lost kinetic energy is transformed into thermal energy, sound energy, and material deformation.

14a.

– Snell’s law of refraction states that “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for a given pair of media and given wavelength of light.” The constant in law is called refractive index and denoted by the letter ‘n’.

(17a)

i. Optics

ii. Fuselage

iii. Mechanical transmission.

iv. Electrical control.

 

More answers… Loading

33 Comments

  1. Nzorov Emmanuel July 28, 2021
  2. McPhilips July 28, 2021
  3. Anonymous July 28, 2021
    • MyScholarshipBaze July 28, 2021
  4. Anonymous July 28, 2021
    • Aniny July 29, 2021
  5. Seun July 28, 2021
  6. Mark July 28, 2021
  7. Anonymous July 28, 2021
  8. Rex July 28, 2021
    • MyScholarshipBaze July 29, 2021
  9. david July 28, 2021
  10. justice July 28, 2021
  11. justice July 28, 2021
  12. Dennis Ndukwe July 28, 2021
  13. Nkechi July 29, 2021
  14. mariam July 29, 2021
  15. Rancho July 29, 2021
    • MyScholarshipBaze July 29, 2021
  16. Anonymous July 29, 2021
  17. Anonymous July 29, 2021
    • MyScholarshipBaze July 29, 2021
  18. Legend July 29, 2021
  19. Silva July 29, 2021
  20. Silva July 29, 2021
  21. James July 29, 2021
  22. Taiwo Raheemot Taiwo July 29, 2021
  23. TheDezigners July 29, 2021
  24. Victory July 29, 2021
  25. Marysmart July 29, 2021
  26. simple July 29, 2021
  27. Johnny Tesla July 29, 2021
  28. Cynthia August 1, 2021

Leave a Reply