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1.

When an ideal voltmeter is connected between the points E and F (fig) the reading of the meter is `V_(0)`. When an ideal ammeter is connected between E and F, readig is `I_(0)`. Find the current I through a resistor R connected between E and F. [Hint: The circuit behaves like voltage source of `V_(0)` and some resistance r in series]

Answer» Correct Answer - `(V_(0)I_(0))/(V_(0)+I_(0)R)`
Discussion
2.

In a metre bridge, the wire consist of two parts one of length 30 cm and of radius r and the other of radius 2r. Where wil the null point occur if the resistance in the left and right gaps are `5Omega` and `8Omega`, respectively? The material of the wires is the same.

Answer» Correct Answer - 18.37 cm
Discussion