1
TS EAMCET 2022 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

A current carrying loop $A B C D$ has two circular arcs $A D$ and $B C$ with radius 1 cm and 2 cm respectively, as shown in the figure. The two arcs $A D$ and $B C$ subtend a common angle $30^{\circ}$ at the centre $O$. If the current flowing in the loop is $\frac{12}{\pi} \mathrm{~A}$. Then, the magnitude of net magnetic field at $O$ is (given, $\mu_0=4 \pi \times 10^{-7}$ )

TS EAMCET 2022 (Online) 20th July Morning Shift Physics - Moving Charges and Magnetism Question 15 English
A

$0.5 \mu \mathrm{~T}$

B

$3 \mu \top$

C

$1 \mu \mathrm{~T}$

D

$1.5 \mu \mathrm{~T}$

2
TS EAMCET 2022 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Three parallel wires $a, b$ and $c$ carrying currents $i_a, i_b$ and $i_c$ as shown in the figure are placed next to each other.

TS EAMCET 2022 (Online) 20th July Morning Shift Physics - Moving Charges and Magnetism Question 14 English

The magnitude force on a length $l$ of the wire $a$, if $d_2=2 d_1, i_b=i_a$ and $i_c=4 i_a$ is

A

$\frac{\mu_0}{6 \pi d_1} i_a^2$ l

B

$\frac{\mu_0}{2 \pi d_1} i_a^2 /$

C

$\frac{\mu_0}{4 \pi d_1} i_a^2 /$

D

$\frac{\mu_0}{3 \pi d_1} i_a^2$ I

3
TS EAMCET 2022 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

An iron bar having a cross-sectional area of $2 \times 10^{-5} \mathrm{~m}^2$ and magnetising field of $2400 \mathrm{~A} / \mathrm{m}$ produce a magnetic flux $2.4 \pi \times 10^{-5} \mathrm{~Wb}$. What will be the value of permeability $\mu$ and susceptibility $\chi$ of the bar (given, $\mu_0=4 \pi \times 10^{-7}$ )

A

$\mu=5 \times 10^{-4}, \chi=1249 \pi$

B

$\mu=5 \pi \times 10^{-4}, \chi=1249 \pi$

C

$\mu=5 \pi \times 10^{-4}, \chi=1249$

D

$\mu=5 \times 10^{-4}, \chi=1249$

4
TS EAMCET 2022 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

A metal disc of radius 30 cm rotates with a constant angular velocity $\omega=100 \mathrm{rad} / \mathrm{s}$ about its axis. Find the magnitude of potential difference between the centre and the rim of the disc of the external uniform magnetic field on induction $B=4 \mathrm{mT}$ is directed perpendicular to the disc.

A

15 mV

B

18 mV

C

22 mV

D

20 mV

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