K.C.S.E Physics Q & A - MODEL 2006PP2QN01
Figure 1 shows two bar magnets placed with the south poles close together
In figure 1 sketch the magnetic field pattern between the two south poles
ANSWER
0 Comments
K.C.S.E Physics Q & A - MODEL 2005PP1QN37
​ In the set up Fig 17 the metal rod is made up of steel and iron pieces joined end. Your are provided with two iron nails
​Explain how you would use two nails provided to determine which side is iro
ANSWERS
K.C.S.E Physics Q & A - MODEL 2004PP1QN12&13
​Figure 8 shows a current-carrying coil in a magnetic field.
Use the information on the figure to answer question 12 and 13.
Mark on figure 8 the direction of the forces acting on the sides of the coil labeled State two ways of increasing the force on the coil.
answer
K.C.S.E Physics Q & A - MODEL 2004PP1QN11
​ Figure 7 shows the poles of two magnets close together.
​Figure 8 shows a current-carrying coil in a magnetic field.
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN13
Give a reason why the core of the electromagnet of an electric bell is made of soft iron and not steel.
answers
K.C.S.E Physics Q & A - MODEL 2003PP1QN12
​ Figure 8 shows a bar of soft iron placed near a magnet.
On the same diagram, sketch the magnetic field pattern due to the set up
answer
K.C.S.E Physics Q & A - MODEL 2002PP1QN33
​Fig. 15 shows a wire XY placed in a magnetic field.
​State the direction in which the wire must be moved for the current to move in the direction shown.
answer
K.C.S.E Physics Q & A - MODEL 2002PP1QN13
Fig. 8 shows two parallel thick copper conductors connected to a D.C. power supply. A rider made from a thin copper wire is placed on the conductors.
State and explain what is observed on the rider when the switch is closed.
answer
K.C.S.E Physics Q & A - MODEL 2002PP1QN11
​Fig. 6 shows a soft iron placed between poles of two magnets.
​Sketch the magnetic field pattern.
answer
K.C.S.E Physics Q & A - MODEL 2001PP1QN11
​Fig 8 shows a soft-iron ring placed between the poles of a magnet. On the same diagram sketch the magnetic field pattern.
ANSWER
K.C.S.E Physics Q & A - MODEL 2000PP1QN33
State the reason why soft iron is laminated.
answer
K.C.S.E Physics Q & A - MODEL 2000PP1QN12
​ Fig. 7 shows how magnets are stored in pairs with keepers at the ends
​Explain how this method of storing helps in retaining magnetism longer.
ANSWER
K.C.S.E Physics Q & A - MODEL 1999PP1QN33
Figure 16 shows a wire XY at right angles to a magnetic field. XY is part of circuit containing a galvanometer.
ANSWER
K.C.S.E Physics Q & A - MODEL 1999PP1QN13
Figure 9 shows a wire carrying a current whose direction is into the paper.
The wire is placed in a magnetic field.
Indicate on the figure the direction of the force acting on the wire.
ANSWER
K.C.S.E Physics Q & A - MODEL 1999PP1QN12
How can it be shown that the strength of a magnet is concentrated at the poles?
ANSWERS
K.C.S.E Physics Q & A - MODEL 1998PP1QN14
Explain how hammering demagnetizes a magnet
ANSWERS
K.C.S.E Physics Q & A - MODEL 1997PP1QN15
Figure 7 shows an incomplete circuit of an electromagnet. Complete the circuit between X and Y drawing the windings on the two arms of the core such that A and B are both North poles when switch S is closed. Indicate the direction of the current on the windings drawn.
answers
K.C.S.E Physics Q & A - MODEL 1997PP1QN13
Distinguish between soft and hard magnetic materials
answers
K.C.S.E Physics Q & A - MODEL 1996PP2QN02
(a) Given a bar magnet, an iron bar and a string
(i) Describe a simple experiment to distinguish between the magnet and the iron bar (ii) State with reasons the observation that would be made in the experiment (b) In an experiment to magnetize two substances P and Q using electric current, two curves ( graphs) were obtained as shown in figure 
Using the information in Fig 1 explain the difference between the substances P and Q with references to the domain theory
answers
(a) (i) Each bar is suspended at a time using the string;
The suspended bar is allowed to rest; Its orientation is observed and recorded; This is repeated several times for confirmation (ii) The bar magnet settles in the N – S specific direction, due to its Interaction (l) with magnetic field of the earth (l) The iron bar settles in any direction; (l) because it does not have a magnetic field to the interact with that of the earth; (l) (b) P and Q are magnetized to the same level, by applying two different (l) current lp and lq such that lq > lp (l) Thus Q requires greater magnetizing power, (l) since its domains are more difficult to align; (l) P is easier to magnetize, since its (l) domain are more easily aligned: K.C.S.E Physics Q & A - MODEL 1996PP1QN13
Figure 4 shows tow parallel current conductors A and B placed close to each other. The direction of the current is into the plane of the paper.
On the same figure; (i) Sketch the magnetic field pattern (ii) Indicate the force F due to the current on each conductor
ANSWERS
 Give a reason why attraction in magnesium is not regarded as a reliable method of testing for polarity.K.N.E.C Marking Scheme
All ferromagnetic materials are attracted by magnets or any magnetic materials is attracted |
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
|
RSS Feed