1
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A closely wound solenoid of 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm . If the current carried is 8 A , then the magnitude of the magnetic field inside the solenoid near its centre is approximately

A

$1.5 \times 10^{-2} \mathrm{~T}$

B

$2.5 \times 10^{-2} \mathrm{~T}$

C

$3.5 \times 10^{-2} \mathrm{~T}$

D

$4.5 \times 10^{-2} \mathrm{~T}$

2
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The period of oscillation of a bar magnet at a place is 2 s . At the same place, the period of oscillation of another identical bar magnet whose magnetic moment is 4 times so that of first magnet is

A

4 s

B

1 s

C

2 s

D

0.5 s

3
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The self inductance of a coil depends on

A

number of turns of the coil only

B

size of the coil only

C

shape of the coil only

D

size, shape of the coil and number of turns in it

4
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A conducting circular coil is place in a uniform magnetic field with the magnetic field initially directed perpendicular to the plane of the coil. In step $A$, the coil is rotated from its initial position by $60^{\circ}$ about its diameter in time $t$. In step $B$, the coil is further rotated about the same axis in the same sense by another $120^{\circ}$ in time $2 t$. Ratio of emf induced in the coil in step $A$ to that in step $B$ is

A

$1: 1$

B

$1: 2$

C

$1: 3$

D

$2: 3$

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