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i want question 12, 13, 14, 15
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ans12 aur abhi de rhe
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jaspreetkaur08:
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According to joules law of heating , H is direclty propirtional to i^2, & H is directly proportional to resistance, & h is dirrctly proportional to time.... therefore h=i^2rt
ty
Short Circuit:- If the live wire and neutral wire cime in contact either directly or via conducting wire, then it is called short circuiting. in this case, the resistance of the circuit is almost zero which results in the flow of a large current. this heats up the wire dangerously and may lead to fire.
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Over Loading:- If many electrical appliances of high power rating are switched on the same time, then they draw a large current from the circuit. this is called overloading.
14(a):- there are different methods by which current can be induced in a circuit: (i):- By moving a coil in a magnetic field. (ii):- By changing the magnetic field around a nearby coil.
Resistance:- It is the property of a conductor by virtue of which opposes the flow of charges through it. its S.I unit is Ohm.
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▪Compound A is ethene and Compound B is ethanol.
CH3CH2OH--->CH2=CH2+H20
H2SO4 acts as a dehydrating agent.
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