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1
TS EAMCET 2023 (Online) 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $\chi$ is the susceptibility and $\mu_r$ is the relative permeability of a ferromagnetic substance, then

A

$x \ll 1$

B

$\mu_r \ll 1$

C

$\mu_r=0$

D

$x \gg 1$

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 Morning Shift
MCQ (Single Correct Answer)
+1
-0

materials suitable for permanent magnets, must have which of the following properties?

A

High retentivity, low coercivity and high permeability.

B

Low retentivity, low coercivity and low permeability.

C

Low retentivity, high coercivity and low permeability.

D

High retentivity, high coercivity and high permeability.

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

The expression for the magnetic energy stored in a solenoid of length $L$, in terms of magnetic field $B$ and area $A$ is

A

$\frac{1}{2 \mu_0} B^2 A L$

B

$\frac{1}{2 \varepsilon_0} B^2 A L$

C

$\frac{1}{2 \mu_0} B A^2 L$

D

$\frac{1}{2 \varepsilon_0} B A^2 L$

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