TS EAMCET 2023 (Online) 13th May Evening Shift | Current Electricity Question 29 | Physics

As shown in the figure, in a Wheatstone's bridge, three resistances $P, Q$ and $R$ are connected in the three arms and the fourth arm is formed by two resistances $S_1$ and $S_2$ connected in parallel. The condition for the bridge to be balanced is

TS EAMCET 2023 (Online) 13th May Evening Shift Physics - Current Electricity Question 31 English

$\frac{P}{Q}=\frac{2 R}{S_1+S_2}$

$\frac{P}{Q}=\frac{R\left(\mathrm{~S}_1+\mathrm{S}_2\right)}{\mathrm{S}_1 \mathrm{~S}_2}$

$\frac{P}{Q}=\frac{R\left(\mathrm{~S}_1+\mathrm{S}_2\right)}{2 \mathrm{~S}_1 \mathrm{~S}_2}$

$\frac{P}{Q}=\frac{R}{S_1+S_2}$

TS EAMCET 2023 (Online) 13th May Morning Shift

MCQ (Single Correct Answer)

-0

The electric resistance of a certain wire of iron is $R$. If its length and radius are both doubled, then

The resistance will be doubled and the specific resistancewil be halved.

The resistance will be halved and the specific resistance will remain unchanged.

The resistance will be halved and the specific resistance will be doubled.

The resistance and the specific resistance, both will remain unchanged.

TS EAMCET 2023 (Online) 13th May Morning Shift

MCQ (Single Correct Answer)

-0

In a meter bridge experiment the ratio of the left gap resistance to the right gap resistance is $2: 3$. The balance length from left end is

20 cm

60 cm

50 cm

40 cm

TS EAMCET 2023 (Online) 13th May Morning Shift

MCQ (Single Correct Answer)

-0

In a galvanometer, $5 \%$ of the total current in the circuit passes through it. If the resistance of the galvanometer is $G$, the shunt resistance $S$ connected to the galvanometer is

$19 G$

$G / 19$

$20 G$

$\mathrm{G} / 20$

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