1
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A cylindrical metallic wire is stretched to increase its length in such a way that the metallic wire changes its resistance by $6 \%$. The percentage increase in its length is

A

$2 \%$

B

$4 \%$

C

$3 \%$

D

$12 \%$

2
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Find the current in the three resistors as shown in the following figure?

TS EAMCET 2022 (Online) 18th July Evening Shift Physics - Current Electricity Question 22 English

A

$i_1=0, i_2=\frac{4 V}{R}, i_3=\frac{2 V}{R}$

B

$i_1=0, i_2=0, i_3=0$

C

$i_1=0, i_2=\frac{2 V}{R}, i_3=\frac{4 V}{R}$

D

$i_1=0, i_2=\frac{2 V}{R}, i_3=\frac{2 V}{R}$

3
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A horizontal wire carries 160 A current below which another wire of linear density $10 \mathrm{~g} / \mathrm{m}$ carrying a current is kept at 4 cm distance. If the wire kept below hangs in air, what is the current in this wire, when the direction of current in both the wires is same? $\left(g=10 \mathrm{~m} / \mathrm{s}^2\right.$ and $\left.\mu_0=4 \pi \times 10^{-7}\right)$

A

125 A

B

140 A

C

110 A

D

100 A

4
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A long solenoid has 70 turns / cm and carries current $I$. An electron moves within the solenoid in a circle of radius 2.5 cm perpendicular to the solenoid axis. If the speed of the electron is $4.4 \times 10^6 \mathrm{~m} / \mathrm{s}$, then the current $I$ in the solenoid is

(take $\mu_0=4 \pi \times 10^{-7}$ Si unit, mass electron $=9 \times 10^{-31}$

kg , charge of electron $1.6 \times 10^{-19} \mathrm{C}$ )

A

98.5 mA

B

112.5 mA

C

125 mA

D

175.0 mA

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