Wheatstone Bridge
Trending Questions
Q. A, B and C are three points situated in a uniform electric field, as shown. The electric potential is-
- Same at all the three points A, B and C
- Maximum at A
- Maximum at B
- Maximum at C
Q. In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across 52 cm of the potentiometer wire. If the cell is shunted by the resistance of 5 Ω, a balance is found when the cell is connected across 40 cm of the wire. Find the internal resistance of the cell.
- 2Ω
- 2.5Ω
- 1Ω
- 1.5Ω
Q.
What is current sensitivity?
Q. In the following circuit, the resultant capacitance between A and B is 1 μF. Then the value of C is 32x μF
Q. The metre bridge is in balance position with P/Q=l1/l2 if yes now interchange the position of galvanometer and cell will the bridge work?if yes what will be the balanced condition
Q. Twelve capacitors each having a capacitance C, are connected to form a cube. Find the equivalent capacitance of the cube along the face diagonal?
[Take C=9 μF]
[Take C=9 μF]
- 43 μF
- 127 μF
- 12 μF
- 56 μF
Q. The equivalent capacitance between points A and B is-
- C4
- C2
- C
- 2C
Q.
Define analog device and give some examples of it
Q. Four identical capacitors are connected as shown in diagram. When a battery of 6 V is connected between A and B, the charge stored is found to be 1.5 μC. The value of C1 is: -
- 2.5 μF
- 15 μF
- 1.5 μF
- 0.1 μF
Q. Twelve capacitors each of capacitance C are connected together so that each lies along the edge of the cube as shown in figure. The equivalent capacitance between 1 and 4 will be:
- 5C7
- 4C3
- 12C7
- 7C4
Q.
Why shunt is connected in parallel to galvanometer?
Q. Three capacitors connected in series have an effective capacitance of 2 μF. If one of the capacitors is removed, the effective capacitance becomes 3 μF. The capacitance of the capacitor that is removed is
- 13 μF
- 32 μF
- 23 μF
- 6 μF
Q. What is the equivalent capacitance of the infinite ladder network shown in figure between points A and B.
- 43 μF
- 23 μF
- Infinite
- (1+√3) μF
Q.
How does the meter bridge overcome end error?
Q. A number of capacitors each of capacitance 1 μF and each one of which gets damaged if the potential difference just exceeding 500 V is applied. Then an arrangement suitable for giving a capacitor of capacitance 3 μF across which 2000 V may be applied, requires at least _____ capacitors. (Give integer value)
Q. An ammeter and a milliammeter are converted from the galvanometer. Out of the two, Which current
measuring instrument has higher resistance?
measuring instrument has higher resistance?
Q. In a PNP transistor working as a common-base amplifier, current gain is 0.96 and emitter current is 7.2 mA. The base current is
- 0.4 mA
- 0.2 mA
- 0.29 mA
- 0.35 mA