Metre bridge: unknown resistance from the null-point shift after a shunt is added

1. A.
   $1\,\Omega$
2. B.
   $2\,\Omega$
3. C.
   $3\,\Omega$
4. D.
   $4\,\Omega$

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1. A.
   $\frac{Sl_1(100-l_2)}{100l_2 - l_1 \cdot 100}$
2. B.
   $\frac{Sl_2(100-l_1)}{100l_1 - l_2 \cdot 100}$
3. C.
   $\frac{100l_2 - l_1}{Sl_1(100-l_2)}$
4. D.
   $\frac{100l_2 - l_1}{sl_2(100-l_1)}$

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1. A.
   $1$
2. B.
   $2$
3. C.
   $3$
4. D.
   $4$

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1. A.
   $25$
2. B.
   $30$
3. C.
   $45$
4. D.
   $60$

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1. A.
   $10\,\Omega$
2. B.
   $15\,\Omega$
3. C.
   $20\,\Omega$
4. D.
   $25\,\Omega$

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