Same situation as in question 14 After inserting the dielectrics, the voltage ac

Question

Same situation as in question 14 After inserting the dielectrics, the voltage across capacitor is the now. A V/4 B V/2 C V D 2V E 4V The figures demonstrate current-voltage characteristics of different four resistors. Which of them demonstrates Ohmic behavior? A B C D E all four. A battery has an emf of 9 v and an internal resistance of 1 Ohm. It is connected to a resistor of 10 Ohm. What is the current through the resistor? A 0.11 A B 0.81 A C 0.90 A D 1.1 A E 9.0 A Consider the circuit shown in the picture. It consists of three identical an ideal battery, a switch S. After closing switch S the total resistance of the circuit: A increases. B decreases. C stays constant.

Explanation / Answer

15)when a dielctric is inserted between the plates of the capacitor the voltage remains same.

so the new voltage will be V

so , option C) V is the correct answer

16)for ohmic behaviour

V is direclty proportioanl to Current

V = IR

when I = 0 , V = 0

so C is the correct answer

17)

from the back emf equation we have

V = E - Ir

IR = E- Ir

I(R+r) = E

I = 9 / (10+1) = 0.81 A

so , option B) is the correct answer

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