Ln a balanced wheat stone bridge, current in galvanometer is zero. It remains zero when: [1] battery

English

Gujarati

Hindi

3.Current Electricity

medium

ln a balanced wheat stone bridge, current in the galvanometer is zero. It remains zero when:

$[1]$ battery emf is increased

$[2]$ all resistances are increased by $10\,ohms$

$[3]$ all resistances are made five times

$[4]$ the battery and the galvanometer are interchanged

only $[1]$ is correct

$[1], [2]$ and $[3]$ are correct

$[1], [3]$ and $[4]$ are correct

$[1]$ and $[3]$ are correct

Solution

For wheatstone bridge,

It is independent of emf Let $r=K R$

$\Rightarrow \mathrm{r}_{1} \mathrm{r}_{4}=\mathrm{K}^{2}\left(\mathrm{R}_{1} \mathrm{R}_{4}\right)=\mathrm{K}^{2}\left(\mathrm{R}_{2} \mathrm{R}_{3}\right)=\mathrm{r}_{2} \mathrm{r}_{3}$

So it is still balance Even if battery and galvanometer are interchanged, still it is balanced. $(1)$ $(3),$ $(4)$ are true, hence.

Standard 12

Physics

In a meter bridge, the balancing length from the left end (standard resistance of $1 \,ohm$ is in the right gap) is found to be $20\, cm$. The value of the unknown resistance is …………… $\Omega$

easy

(AIPMT-1999)

In a meter bridge, the null point is found at a distance of $25\, cm$ from $A$. If now a resistance of $10\,\Omega $ is connected in parallel with $S$, the null point occurs at mid point of $AB$. The value of $R$ is …………….. $\Omega$

medium

In meter bridge or Wheatstone bridge for measurement of resistance, the known and the unknown resistances are interchanged. The error so removed is

easy

$(a)$ In a meter bridge , the balance point is found to be a $39.5\; cm$ from the end $A$, when the resistor $Y$ is of $12.5\; \Omega$ Determine the resistance of $X .$ Why are the connections between resistors in a Wheatstone or meter bridge made of thick coppestrips?

$(b)$ Determine the balance point of the bridge above if $X$ and $Y$ arinterchanged.

$(c)$ What happens if the galvanometer and cell are interchanged at the balance point of the bridge? Would the galvanometer shot any current?

medium

Resistance in the two gaps of a meter bridge are $10\, ohm$ and $30\, ohm$ respectively. If the resistances are interchanged the balance point shifts by………….. $cm$

medium

ln a balanced wheat stone bridge, current in the galvanometer is zero. It remains zero when: $[1]$ battery emf is increased $[2]$ all resistances are increased by $10\,ohms$ $[3]$ all resistances are made five times $[4]$ the battery and the galvanometer are interchanged

Solution

Similar Questions

In a meter bridge, the balancing length from the left end (standard resistance of $1 \,ohm$ is in the right gap) is found to be $20\, cm$. The value of the unknown resistance is …………… $\Omega$

In a meter bridge, the null point is found at a distance of $25\, cm$ from $A$. If now a resistance of $10\,\Omega $ is connected in parallel with $S$, the null point occurs at mid point of $AB$. The value of $R$ is …………….. $\Omega$

In meter bridge or Wheatstone bridge for measurement of resistance, the known and the unknown resistances are interchanged. The error so removed is

Resistance in the two gaps of a meter bridge are $10\, ohm$ and $30\, ohm$ respectively. If the resistances are interchanged the balance point shifts by………….. $cm$

Start a Free Trial Now

ln a balanced wheat stone bridge, current in the galvanometer is zero. It remains zero when:

$[1]$ battery emf is increased

$[2]$ all resistances are increased by $10\,ohms$

$[3]$ all resistances are made five times

$[4]$ the battery and the galvanometer are interchanged