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

Balancing point of a potentiometer shifts from a length of 60 cm to 40 cm by shunting the cell with a $4 \Omega$ resistance. What is the internal resistance of the cell?

A

$1 \Omega$

B

$2 \Omega$

C

$4 \Omega$

D

$6 \Omega$

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

A current $I=5 \mathrm{~A}$ flows along a thin wire shaped as shown in figure. The radius of curved part of the wire is equal to $R=100 \mathrm{~mm}$, the angle $2 \phi=90^{\circ}$. The magnitude of magnetic field at the point $O$ is approximately

$$ \left(\text { use, } \frac{\mu_0}{4 \pi}=10^{-7} \mathrm{~T} \mathrm{~mA}^{-1}\right) $$

TS EAMCET 2022 (Online) 18th July Morning Shift Physics - Moving Charges and Magnetism Question 21 English

A

$33.6 \mu \mathrm{~T}$

B

$38.4 \mu \mathrm{~T}$

C

$48.7 \mu \mathrm{~T}$

D

$252 \mu \mathrm{~T}$

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

A toroid has a core (non-ferro magnetic) of inner radius 24 cm and outer radius 26 cm around which 2000 turns of a wire is wound. If the current in the wire is 12 A , the magnetic field inside the core of the toroid is

A

$1.92 \times 10^{-2} \mathrm{~T}$

B

$1.88 \times 10^{-2} \mathrm{~T}$

C

$2.12 \times 10^{-2} \mathrm{~T}$

D

$1.98 \times 10^{-2} \mathrm{~T}$

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

A planet has magnetic dipole moment of $27 \times 10^{22} \mathrm{~A}-\mathrm{m}^2$. If the radius of the planet is 300 km , what would be the magnetic field at its equator? $\left(\right.$ use,$\left.\frac{\mu}{4 \pi}=10^{-7}\right)$

A

1 T

B

27 T

C

11 T

D

30 T

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