K.C.S.E Physics Q & A - MODEL 2008PP2QN09
​Figure 6 shows a circuit in which a battery of negligible internal resistance, two resistors, a capacitor, a voltmeter and a switch are connected.
Giving a reason for your answer in each case, state the reading of the voltammeter, V, when the switch is
(i) Open V=………………………… Reason………………… (ii) Closed V=………………………… Reason……………….
answer
0 Comments
K.C.S.E Physics Q & A - MODEL 2008PP2QN03
​ You are provided with the following;
A cell and holder, a switch, a rheostat, an ammeter, a voltmeter and connecting wires. Draw a diagram for a circuit that could be used to investigate the variation of the potential difference across the cell with the current drawn from the cell. 
answer
K.C.S.E Physics Q & A - MODEL 2007PP2QN15
​(a) State Ohm's Law
(b) The graph in figure 9 shows the current – voltage characteristics of a certain device, X 
(i) State with a reason whether the device obeys Ohm's law
(ii) Determine the resistance of the device, X, when the current through it is 60 mA. (iii) When the device, X is connected in the circuit below, the voltage across it is 0.70 V. 
​Calculate the value of the resistance R.
(c) The cell in figure 10 has an e.m.f of 2.1 V and negligible internal resistance. 
​Determine the
(i) Total resistance in the circuit (ii) Current in the circuit (iii) Reading of the voltmeter
answers
K.C.S.E Physics Q & A - MODEL 2007PP2QN08
​In the circuit diagram shown in figure 7, the ammeter has negligible resistance
When the switch S, is closed, the ammeter reads 0.13 A. 
​Determine the internal resistance of the cell
ANSWER
K.C.S.E Physics Q & A - MODEL 2006PP2QN17
Figure 7 shows a circuit where a battery of emf 4.5V, switches A and B, two capacitors C1 = 0.3μF and C2 = 0.5 μ F and a voltmeter are connected
​(a) Determine the charge on C1 when switch A is closed and switch B is open
(b) What is the effective capacitance Ct when both switches A and B are closed? (c) State what is observed on the voltmeter when (i) switch A is closed and switch B is open (ii) Switch A is closed and opened, and then B is closed (iii) Explain the observation made in c (ii) above
answer
K.C.S.E Physics Q & A - MODEL 2006PP2QN09
State one condition under which Ohm's law is obeyed in a metal conductor
ANSWER
K.C.S.E Physics Q & A - MODEL 2006PP2QN06
​Figure 4 shows a solenoid carrying an electric current.
​Sketch the magnetic field pattern inside and at the ends of the solenoid
ANSWER
K.C.S.E Physics Q & A - MODEL 2005PP1QN18
​A student wishes to investigate the relationship between current and voltage for certain device X. In the space provided, draw a circuit diagram including two cells, rheostat, ammeter, voltmeter ad the device X that would be suitable in obtaining the desired results.
answer
K.C.S.E Physics Q & A - MODEL 2003PP2QN05
a) States what is meant by electromotive force (em.f) of battery.
b) The graph in figure 5 shows the terminal voltage, V, of a certain battery varies with the current, I, being drawn from the battery. 
​(i) Write an expression relating the e.m.f. E, terminal voltage, V, current, I and the internal resistance, r, of the battery for the circuit drawn in
(i) above. (iii) From the graph determine the; I internal resistance, r, of the battery. (C) A galvanometer of resistance 10ohms gives a full-scale deflection when a current of 0.03A flows through it. Determine the resistance of the resistor, which would be required to convert the galvanometer to an ammeter reading up to 3.0a
answers
K.C.S.E Physics Q & A - MODEL 2003PP1QN23
In the circuit diagram shown in fig. 12, the lamps are Identical and the cells are also identical.
​State with reason, in which circuit the lamp will be lit for longer period.
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN17
​An electric bulb is rated 75W, 240V. Determine the resistance of the bulb
answer
K.C.S.E Physics Q & A - MODEL 2002PP1QN09
​ Fig. 4 shows electrical circuit. When the switch is closed the ammeter reading is 0.3 A.
Determine the voltmeter reading.
ANSWER
K.C.S.E Physics Q & A - MODEL 2002PP1QN04A current of 0.70 A flows through a wire when a p.d of 0.35 V id applied at the ends of the wire. If the wire is 0.5m long and has a cross section area of 8.0 x 10-3 m-2, determine its resistivity.
answer
K.C.S.E Physics Q & A - MODEL 2001PP1QN18
An electric heater rated 240V ; 300w is to be connected to a 240V mains supply, through a 10A fuse. Determine whether the fuse is suitable or not.
answer
K.C.S.E Physics Q & A - MODEL 2001PP1QN17
​The ammeter in the circuit in Fig. 11 has negligible resistance.
When the switch S is closed, the ammeter reads 0.01A. Determine the internal resistance of the battery.
answer
An electric bulb rated, 40W is operating on 240V mains. Determine the resistance of its filament.8/7/2020
K.C.S.E Physics Q & A - MODEL 2000PP1QN19
An electric bulb rated, 40W is operating on 240V mains. Determine the resistance of its filament.
ANSWER
K.C.S.E Physics Q & A - MODEL 2000PP1QN18
​In fig. 11 ammeters have negligible resistance and the cells are all identical
Show that all the ammeters A1, A2, and A5 have the same reading.
Let A's represent current thought the ammeters using the Kirchoffs law.
ANSWERS
K.C.S.E Physics Q & A - MODEL 1999PP2QN05a) A circuit consists of a battery, a metal wire, an ammeter and a switch connected in series. The switch is closed and the ammeter reading noted. The metal wire is now heated. State the observations made on the ammeter reading and give a reason for your answer.
|
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
