AP EAPCET 2025 - 21st May Morning Shift | Current Electricity Question 19 | Physics

A wire of resistance $100 \Omega$ is stretched, so that its length increases by $20 \%$. The stretched wire is then bent in the form of a rectangle whose length and breadth are in the ratio $3: 2$. The effective resistance between the ends of any diagonal of the rectangle is

$36 \Omega$

$72 \Omega$

$28.8 \Omega$

$432 \Omega$

AP EAPCET 2025 - 21st May Morning Shift

MCQ (Single Correct Answer)

-0

In a potentiometer experiment, when two cells of emfs $E_1$ and $E_2\left(E_2>E_1\right)$ are connected in series, the balancing length is 160 cm . If one of the cells is reversed, the balancing length decreases by $75 \%$. If $E_1=1.2 \mathrm{~V}$, then $E_2=$

2 V

2.4 V

1.8 V

1.5 V

AP EAPCET 2024 - 23th May Morning Shift

MCQ (Single Correct Answer)

-0

The emf of a cell of internal resistance $2 \Omega$ is measured using a voltmeter of resistance $998 \Omega$. The error in the emf measured is

$0.4 \%$

$4 \%$

$2 \%$

$0.2 \%$

AP EAPCET 2024 - 23th May Morning Shift

MCQ (Single Correct Answer)

-0

In a meter bridge experiment, a resistance of $9 \Omega$ is connected in the left gap and an unknown resistance greater than $9 \Omega$ is connected in right gap. If the resistance in the gaps are interchanged, the balancing point shifts by 10 cm . The unknown resistance is

$18 \Omega$

$22 \Omega$

$11 \Omega$

$36 \Omega$

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