# National Standard Examination in Physics (NSEP) Solved Paper 2016 Part-6

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Q: 20. In the circuit adjacent arrangement it is found that deflection in the galvanometer is 10 divisions. Also the voltage across the ‘wire AB’ is equal to the across the galvanometer. Therefore, the current sensitivity of the galvanometer is about.

(A)

(B)

(C)

(D) Data insufficient

Answer: (B)

Q: 21. The ‘wire AB’ is now part of the adjacent circuit. With the resistors P = 50 Ω and Q = 100 Ω, the null point is obtained at C where AC = 33 cm. When the resistors are interchanged, the null point is found at C with AC = 67 cm. The systematic error in this experiment seems to be due to non- coincidence of A and B with 0 cm mark and 100 cm mark respectively. If these end errors are equivalent to ‘a’ cm and ‘b’ cm respectively, then they are

(A) 0 and 1

(B) 1 and 0

(C) 0.33 and 0.33

(D) 1 and 1

Answer: (D)

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