Q. No.Which of the following statements is false?
| 1. | Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude |
| 2. | In a balanced Wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed |
| 3. | A rheostat can be used as a potential divider |
| 4. | Kirchhoff’s second law represents energy conservation |
Subtopic: Wheatstone Bridge |
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In the given circuit, an \(8~\text{V}\) battery powers a network of resistors. The current \(i_1\) flows from point \(A\) to point \(C\) through the resistor network. The value of \(i_1\) is:
1. \(2~\text{A}\)
2. \(1~\text{A}\)
3. \(5~\text{A}\)
4. \(4~\text{A}\)
Subtopic: Wheatstone Bridge |
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Current measured by the ammeter \(A\) in the reported circuit when no current flows through \(10~\Omega\) resistance will be:
1. \(20~\text{A}\)
2. \(30~\text{A}\)
3. \(10~\text{A}\)
4. \(0~\text{A}\)
1. \(20~\text{A}\)
2. \(30~\text{A}\)
3. \(10~\text{A}\)
4. \(0~\text{A}\)
Subtopic: Wheatstone Bridge |
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Level 1: 80%+
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Subtopic: Wheatstone Bridge |
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Level 1: 80%+
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A battery of \(6\) V is connected to the circuit as shown below. The current \(i\) drawn from the battery is:
1. \(1\) A
2. \(2\) A
3. \(\frac{6}{11}~\text{A}\)
4. \(\frac{4}{3}~\text{A}\)
1. \(1\) A
2. \(2\) A
3. \(\frac{6}{11}~\text{A}\)
4. \(\frac{4}{3}~\text{A}\)
Subtopic: Wheatstone Bridge |
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For the given electrical circuit, the potential difference between point \(B\) and \(C\) is zero. The value of \(x\) is:
1. \(\dfrac{1}{2}\) \(\Omega\)
2. \(\dfrac{3}{2}\) \(\Omega\)
3. \(\dfrac{2}{3}\) \(\Omega\)
4. \(\dfrac{3}{5}\) \(\Omega\)
1. \(\dfrac{1}{2}\) \(\Omega\)
2. \(\dfrac{3}{2}\) \(\Omega\)
3. \(\dfrac{2}{3}\) \(\Omega\)
4. \(\dfrac{3}{5}\) \(\Omega\)
Subtopic: Wheatstone Bridge |
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In the circuit shown, the equivalent resistance between terminals \(A\) and \(B\) is:
1. \(3R/2\)
2. \(2R\)
3. \(4R\)
4. \(R\)
1. \(3R/2\)
2. \(2R\)
3. \(4R\)
4. \(R\)
Subtopic: Wheatstone Bridge |
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The Wheatstone bridge shown in the Figure, gets balanced when the carbon resistor is used as \(R_1\) has the colour code (Orange, Red, Brown). The resistors \( R_2\) and \(R_4\) are \(80 ~\Omega\) and \(40 ~\Omega,\) respectively. Assuming that the colour code for the carbon resistors gives their accurate values, the colour code for the carbon resistor, used as \(R_3\) would be:
1. Brown, Blue, Brown
2. Brown, Blue, Black
3. Red, Green, Brown
4. Grey, Black, Brown
1. Brown, Blue, Brown
2. Brown, Blue, Black
3. Red, Green, Brown
4. Grey, Black, Brown
Subtopic: Wheatstone Bridge |
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Four resistors of resistances \(15~ \Omega , 12~ \Omega , 4~ \Omega ,\) and \(10 ~\Omega \) are connected in cyclic order to form a Wheatstone network. To balance the network, an additional resistor is connected in parallel with the \(10 ~\Omega \) resistor. The value of this additional resistance should be:
1. \(10~\Omega\)
2. \(20~\Omega\)
3. \(30~\Omega\)
4. \(40~\Omega\)
Subtopic: Wheatstone Bridge |
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The heat generated in \(1\) minute between points \(A\) and \(B\) in the given circuit, when a battery of \(9~\text{V}\) with internal resistance of \(1~\Omega\) is connected across these points is: (in J)
1. \(1080\)
2. \(1000\)
3. \(500\)
4. \(250\)
1. \(1080\)
2. \(1000\)
3. \(500\)
4. \(250\)
Subtopic: Wheatstone Bridge |
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