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Syllabus

electric current flows through three lamps when arranged in (a)series(b)a parallel if the filament of one lamp breaks.explain what happens to the other 2 lamps in both the cases(a) Find the correct reading of voltmeter

(b) Find the correct reading of ammeter

^{-8 }ohm meter has a cross section area of 10.3x10^{-4}cm^{2 }. Calculate the length of the wire required to make a 20 ohm coil.b)total current in the circuit

c)potential difference across 30 ohm resistance

_{a hot plate connected to a 220 V has two resistance coils A and B each of 22 omega resistance. Calculate the amount of electric current flowing through these coils are:}_{used indiviually}_{connected in series }_{connected in parallel.}Reason R : Collision of metal atoms with each other releases heat energy.

(1) Both A and R are true and R is the correct explanation of A (3) A is true but R is false

(2) Both A and R are true but R is not a correct explanation of A (4) A is false but R is true

a) copper wire

b) lemon juice

c) vinegar

thank you

state the formula showing how the current I in a conductor varies when the V applied to it is increased in stepsa) through the 3 ohm resistor is 2 A

b) through the 3 ohm resistor is 0.5 A

c) through the 4 ohm resistor is 0.5 A

d) through the 4 ohm resistor is 0.25 A