Which of the following is not a correct relation
a) Q= IT
b)V=IR
c)W = VQ
d)ρ=RAl
Answers
Answer:
The power supply (the cell or battery) gives an amount of energy to each coulomb of charge in an electric circuit.
so, voltage = energy / charge.
This equation can be rearranged to give energy = voltage * charge. E = V * Q.
Since Q = I * t, if we write I * t instead of Q in the above equation we get E = V * I * t.
Energy = voltage * current * time.
We can also use the word work instead of the word energy because,
work done = energy transferred
so, we might see the equation energy = voltage x charge, E = V * Q, written as
work = voltage x charge, W = V * Q.
Therefore, V=W/Q and not WQ. Hence, option C is incorrect.
Answer:
option d is not correct
Explanation:
option a is correct as current is defined as the rate of flow of charge
therefore ,
I = Q/T
=> Q = IT
option b comes from ohm's law
option c is correct as Potential(V) of a point is defined as the work done to bring a unit positive charge from infinity to that point. therefore,
V = W/Q
=>W = VQ
coming to option d ,
R = ρl/A
=> ρ = RA/l
therefore option d is wrong
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