Q48.In a metre bridge experiment null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y . If X < Y , then where will be the new position of the null point from the same end, if one decides to balance a resistance of 4X against Y? (1) 50 cm (2) 80 cm (3) 40 cm (4) 70 cm
What This Question Tests
This question tests the application of the Wheatstone bridge principle for a metre bridge, involving calculation of a new null point after changing one of the resistances.
Concepts Tested
Formulas Used
X/Y = l1/(100-l1)
📚 NCERT Sections This Tests
2.1 — Two Charges 5 × 10–8 C And –3 × 10–8 C Are Located 16 Cm Apart. At
Physics Class 11 · Chapter 2
2.1 Two charges 5 × 10–8 C and –3 × 10–8 C are located 16 cm apart. At what point(s) on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero.
4.7 — Two Long And Parallel Straight Wires A And B Carrying Currents Of
Physics Class 11 · Chapter 4
4.7 Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A.
4.10 — Two Moving Coil Meters, M1 And M2 Have The Following Particulars:
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4.10 Two moving coil meters, M1 and M2 have the following particulars: R1 = 10 Ω, N1 = 30, A1 = 3.6 × 10–3 m2, B1 = 0.25 T R2 = 14 Ω, N2 = 42, A2 = 1.8 × 10–3 m2, B2 = 0.50 T (The spring constants are identical for the two meters). Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of M2 and M1.
📋 Question Details
- Chapter
- Current Electricity
- Topic
- Metre Bridge
- Year
- 2004
- Shift
- Unknown
- Q Number
- Q48
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 3: Current Electricity
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