State why alternating current (a.c) is used for transmitting electricity over long distances21/7/2020
K.C.S.E Physics Q & A - MODEL 2012PP2QN012
State why alternating current (a.c) is used for transmitting electricity over long distances
answer
0 Comments
K.C.S.E Physics Q & A - MODEL 2012PP2QN11
​Figure 10, shows the cross section of a conductor held between two magnets and carrying a current out of the paper.
​Indicate with an arrow on the diagram the direction in which the conductor will move when it is released.
K.C.S.E Physics Q & A - MODEL 2012PP2QN10
Figure 9, shows the cross-section of an optical fibre made of two types of glass A and B. The refractive index of B is lower than that of A.
A ray of light enters the optical fibre at P and emerges from Q.
(i) Sketch the path of the ray through the fibre. (ii) State the reason why light travels through the fibre as in (i) above. K.C.S.E Physics Q & A - MODEL 2012PP2QN09
​Figure 8, shows an object O placed infront of a diverging lens whose principal focus is F
​On the figure, draw a ray diagram to locate the image formed.
K.C.S.E Physics Q & A - MODEL 2012PP2QN08
​Light from a lamp falls on the cap of a negatively charged electroscope. It is observed that the divergence of the leaf decreases. Explain the observation.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP2QN07
​Figure 7, shows two similar coils P and Q around the end L and M of a piece of soft iron. A steady current passes through the coils
​State the polarity of the resulting magnet at end L.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP2QN06
Figure 6, shows a narrow beam of radiation from a radioactive source, incident to a post card. The emergent radiation passes through a magnetic field which is perpendicular to the plane of the paper, and into the paper.
​A detector moved along line AC only detects radiations B and C. State the types of radiation detected.
K.C.S.E Physics Q & A - MODEL 2012PP2QN05
​Figure 5, shows an object O at the bottom of a beaker full of a liquid. An observer above the beaker sees its image at point X inside the liquid.
​Determine the refractive index of the liquid.
K.C.S.E Physics Q & A - MODEL 2012PP2QN04
​Figure 4, shows a negative point charge placed near a positively charged rod.
​Draw on the diagram, the resulting electric field pattern.
K.C.S.E Physics Q & A - MODEL 2012PP2QN03
​Figure 3, shows four identical light bulbs connected to a 15 volts battery whose internal resistance is negligible.
​Determine the reading of the voltmeter V.
K.C.S.E Physics Q & A - MODEL 2012PP2QN02K.C.S.E Physics Q & A - MODEL 2012PP2QN01
​Figure 1, shows a plane mirror XY placed equidistant from two parallel lines AB and PT.
​Four students stand at P, Q, R and T in front of the mirror
(a) Indicate the positions of the images of students at Q, R and T on line AB. (b) State which of the images are visible to the student standing at P. (c) Using rays indicate on the figure, how (b) above is possible. K.C.S.E Physics Q & A - MODEL 2012PP1QN19
​(a) Figure 14 shows a lift pump.
​Explain why, when the piston is:
(i) pulled upwards, valve A opens while valve B closes. (ii) pushed downwards, valve A closes while valve B opens. (b) After several strokes, water rises above the piston as shown in Figure 15. State how water is removed from the cylinder through the spout.
|
CATEGORIES
Categories
All
Topics
FORM I - PHYSICS SYLLABUSFORM II - PHYSICS SYLLABUSTOPICS
FORM III - PHYSICS SYLLABUSFORM IV - PHYSICS SYLLABUSARCHIVES
RSS FEEDS
AUTHOR
M.A NyamotiMy passion is to see students pass using right methods and locally available resources. My emphasis is STEM courses
|
We Would Love to Have You Visit Soon! |
Hours24 HR Service
|
Telephone0728 450425
|
|
8-4-4 materialsLevels
Subjects
|
cbc materialsE.C.D.E
Lower Primary
Upper Primary
Lower Secondary
Upper Secondary
|
teacher support
Other Blogs
|