In a experiment on metre bridge, if the balancing length AC is 'x' what would be its value, when the radius of the metre bridge wire AB is doubled? Justify your answer.

For what value of x+y in Fig. will ABC be a line? Justify your answer

In a metre bridge, the balancing length form the left end is focused to be 20 cm. The value of the unknown reistance is

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : In a metre bridge experiment, the balance pont should be btained near the 50 cm mark. Reason : The instrument is based on Wheatstone bridge and it is most sensitive, when the ratio arms are nearly equal.

In a metre bridge [Fig. 3.27], the balance point is found to be at 39.5 cm from the end A, when the resistor R is of 12.5 Omega . Determine the balance point of the bridge above if R and S are interchanged. :

In a metre bridge, the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 Omega . Determine the resistance of X. Made of thick copper strips? Determine the balance point of the bridge above if X and Y are interchanged. What happens if the galvanometer and cell are interchanged at the balance point of the bridge ? Would the galvanometer show any current?

In a metre bridge [Fig. 3.27], the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 Omega Determine the resistance of X. Why are the connections between resistors in a Wheatstone or meter bridge made of thick copper strips?:

Nichrome and copper wires of same length and same radius are connected in series. Current I is passed through them. Which wire gets heated up more? Justify your answer.

The resistance in the left gap of a metre bridge is 10Omega and the balance point is 40 cm form the left end. Calculate the value of the unknown resistance.

In comparing the resistance of two cells P and Q with a sides wire bridge, a balance point is obtained when the sliding contact is 30 cm from the zero end of the wire. The resistances P and Q are interchanged and the balance is obtained at 120 cm from the same emf. Find the ratio of the resistance P and Q and the length of the bridge wire