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PHYSICS OBJECTIVES ANSWERS👇👇:
1-10: CAABACBADB
11-20:ACCCDABDCC
21-30:DBADCABCAB
31-40:CCBBCCBABD
41-50:BDCDBABBDC
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Solving ✍✍✍
PHYSICS OBJECTIVES QUESTIONS
1a*
Strain is
force (a part of one’s body or oneself) to make an unusually great effort.
force (a part of one’s body or oneself) to make an unusually great effort.
2 )
i ) quantity of charge
ii) nature of element
iii ) Time
i ) quantity of charge
ii) nature of element
iii ) Time
2biThe boiling point of a liquid Is the point at which The vapour pressure is equal To atmospheric pressure
3)
-Diamagnetic material
-Paramagnetic material
-Ferromagnetic material
-Diamagnetic material
-Paramagnetic material
-Ferromagnetic material
4a)An intrinsic semiconductor, also called an undoped semiconductoror i-type semiconductor, is a pure semiconductor without any significant dopant species present. The number of charge carriers is therefore determined by the properties of the material itself instead of the amount of impurities.
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4b)
i)Rockets are used for space travel
ii)military uses,
iii)launching satellites into space
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Range = u²Sin2tita/g
At maximum range
Sin2tita = 1
2tita =sin^-1(1)
2tita = 90dgrees
Tita = 90/2 = 45degree
Maximum height reached = u²sin²tita/2g
=u²(sin45)²/2g
=200²(sin45)²/2(10)
=40000(1/√2)2/20
=40000(1/2)/20
=20000/20
=1000metres.
6)
Given constant = 2.9×10^-3mk
Temperature = 57degreeC = (57+273)k = 330k
Using landamaxT = constant
landamaxT330 = 2.9×10^-3
landamax = 2.9×10^-3/330
landamax = 8.788×10^-6m
The speed of electromagnetic wave, v = 3×10^8m/s
Using V = f landa
f = v/landa
=3×10^8/8.788×10^-6
=3.4×10^13Hz
7(a). LASER stands for Light Amplification by Stimulated Emission of Radiation.
(b). A laser is a device that emits a beam of coherent light through an optical amplification process.
i. Nature of the Substance
ii.Medium of transmission
9a(ii)
i.State or phase of the substance (i.e Solid, Liquid or gas).
ii.Temperature of the medium
9b)
i. Temperature
ii. Specific hear capicity kf the Body
9c)
The statement means that the amount of hear energy required to change 1kg of liquid mercury to gaseous mercury without chang3 in temperature is 2.72*10^5Kg^-1
9d(i)
PleasenNote (π) means Change in temperature Q
Q=MCπQ
V^2/R * t=MCπQ
(220)^2*4*60/35=M*4200*(100-28)
33,885.7=302400m
M=33,885.7/302400
M=1.098kg
9d(ii)
V^2/R *t=MLv
(220)^2 *5 *60/35=0.3*Lv
414857.14=0.3Lv
Lv=414857.14/0.3
Lv=1382857.13Jkg^-1
*10a*
the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced.
the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced.
10b
Critical angle: This is the angle of incidence in the denser medium when the angle of refraction in the less dense medium is 90°
Critical angle: This is the angle of incidence in the denser medium when the angle of refraction in the less dense medium is 90°
*10bi*
the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected.
the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected.
12a)
binding energy is the minimum energy that would be required to disassemble the nucleus of an atom into its component parts. These component parts are neutrons and protons, which are collectively called nucleons
12b)* They have short wire length and high frequency.
-They are highly penetrating
-They travel in straight line
-They don’t require material medium for their propagation
(12b)
(i) They have short wavelength and high frequency.
(ii) They are highly penetrating.
(iii) They travel in straight lines.
(iv) They don't require material medium for their propagation.
(12c)
-It is used in production of electricity.
-It is used to study and detect charges in genetic engineering.
-It is used in agriculture.
-It is used in treatment of cancer.
(12di)
E = hf-hfo
but f = v/landa
E= v/landa.h - wo
Where wo = hfo = work function
f= frequency
landa = wavelength
Hence
hf = hfo - E
f = hfo - E/h
f = wo - E/h
Recall; that v = f landa
Therefore f = v/landa = 3×10^8/4.5×10-7
=3/4.5 × 10^8+7
=6.6×10^14Hz
f = 6.6×10^14Hz
(12dii)
E = hf
=6.6×10^-34 × 6.6×10^14Hz
=43.56×10^-20J
(12diii)
Energy of the photoelectron E = hf - vo
=Energy of incident electron - work function
=4.356×10^-19J - 3.0×10^-19J
=1.356×10^-19J
*SNT*
NIGERIA PH
NIGERIA PHYSICS THEORY
G
HANA AND SIERRA LEONE PHYSICS THEORY
SHINING STARS TEAM
Ghana and Sierra Leone
*3a*
Snell’s Law states that the ratio of the angle of incidence to the angle of refraction of a wave as it travels through a boundary between two media is a constant termed the refractive index. The value of this constant is equal to the ratio of speeds before and after it crosses the boundary.
Q4a
Self Inductance
Definition: Self-inductance or in other words inductance of the coil is defined as the property of the coil due to which it opposes the change of current flowing through it. Inductance is attained by a coil due to the self-induced emf produced in the coil itself by changing the current flowing through it.
Definition: Self-inductance or in other words inductance of the coil is defined as the property of the coil due to which it opposes the change of current flowing through it. Inductance is attained by a coil due to the self-induced emf produced in the coil itself by changing the current flowing through it.
5a)
i. Stress: is the proportional to strain provided elastic limit is not exceeded,(F/A).
i. Stress: is the proportional to strain provided elastic limit is not exceeded,(F/A).
ii. Strain is define as the ratio of the extension to original length,(e/l) it has no unit.
iii. Young’s Modulus is the Constant of Proportionality in Hooke’s Law..
Young Modulus= Stress/Stain
Young Modulus= Stress/Stain
*5ai*
STRESS is
(force) per unit area that tends to deform the body on which it acts
STRESS is
(force) per unit area that tends to deform the body on which it acts
*5aii*
Strain is
force (a part of one’s body or oneself) to make an unusually great effort.
Strain is
force (a part of one’s body or oneself) to make an unusually great effort.
