COMEDK 2025 Morning Shift | Current Electricity Question 5 | Physics

The resistance of a wire is 5 ohm at $25^{\circ} \mathrm{C}$ and 7 ohm at $100^{\circ} \mathrm{C}$. The resistance of the wire at $0^{\circ} \mathrm{C}$ is

$\frac{13}{3} \mathrm{ohm}$

$\frac{5}{3} \mathrm{ohm}$

$\frac{2}{3}$ ohm

0.1 ohm

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

Three bulbs of $$40 \mathrm{~W}, 60 \mathrm{~W}$$, and $$100 \mathrm{~W}$$ are arranged in series with a $$220 \mathrm{~V}$$ source. The maximum light is obtained from

40 W

60 W

All give the same light

100 W

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

The resistance of a $$10 \mathrm{~m}$$ long wire is $$10 \Omega$$. Its length is increased by $$25 \%$$ by stretching the wire uniformly. The new resistance is

$$18.6 \Omega$$

$$15.6 \Omega$$

$$12.8 \Omega$$

$$14.9 \Omega$$

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

Four resistors, each of resistance R, are connected as shown in the figure below.

COMEDK 2024 Evening Shift Physics - Current Electricity Question 6 English

The total resistance between points 1 and 3 is 0.5 R.

The total resistance between points 1 and 6 is $$3.5 \mathrm{R}$$.

The total resistance between points 3 and 6 is 2 R.

The total resistance between points 2 and 4 is $$0.5 \mathrm{~R}$$.

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