Permeability in a magnetic circuit corresponds to_________ in an electric circuit.

Consider the following statements.
1. Magnetic lines of force are closed curves while electric lines are not.
2. Electric lines of force are closed curves while magnetic lines are not.
3. Both electric and magnetic lines of force are closed curves.
Which of statement(s) given above is/are correct?

A

Only 2

B

Both 1 and 2

C

Only 1

D

1, 2 and 3

A 40 ml K no. of 10 corresponds to a kappa no. of 14.5, 20 corresponds to 30.4 kappa number, and 30 corresponds to __________ kappa number.

A

64.1

B

32.1

C

85.1

D

95.1

The amount of electric charge flowing through electric circuit in 10 minutes is 300 coulombs. Find the electric current drawn by the filament of the electric bulb is?

A

0.5 A

B

0.2 A

C

5 A

D

2 A

While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit?

A

E.M.F.

B

Current

C

Current density

D

Conductivity

If the velocity of a charged particle in perpendicular electric and magnetic field is 7.27 X 106m/s and the Electric field is 6 X 106 N/c, what should be the value of magnetic field for velocity sector?

A

0.45 T

B

0.78 T

C

0.83 T

D

0.94 T

A material has a permeability of 0.1 H/m when the magnetic intensity is 70 A/m. What will be the magnetic induction inside the material?

A

7 T

B

0.7 T

C

70 T

D

0.07

If electric permittivity and magnetic permeability of the medium are respectively $$\varepsilon $$ and $$\mu $$, then the velocity (C_m) of the electromagnetic wave in the medium is given by:

A

$${{\text{C}}_{\text{m}}} = \frac{1}{{\varepsilon \mu }}$$

B

$${{\text{C}}_{\text{m}}} = \frac{1}{{\sqrt 8 \mu }}$$

C

$${{\text{C}}_{\text{m}}} = \frac{5}{{\sqrt \varepsilon \mu }}$$

D

None of these

Melting point of Sn, Ag, Al, and Au are 232, 961, 660, and 1063(In Degree Celsius) given in their respective order. Which among the following values mentioned below corresponds to the surface energy of Sn? (Options corresponds to the surface energy of the above mentioned 4 elements in mJ m-2)

A

680

B

1080

C

1390

D

1120

For the rectifier circuit shown in the figure, the sinusoidal voltage (V₁ or V₂) at the output of the transformer has a maximum value of 10 V. The loadresistance R_L, is 1 k$$\Omega $$. If l_av is the average current through the resistor R_L, the circuit corresponds to a
Electronics mcq question image

A

full-wave rectifier with l_av = 20/π mA

B

half-wave rectifier with l_av = 20/π mA

C

half-wave rectifier with l_av = 10/π mA

D

full-wave rectifier with l_av = 10/π mA

Substances which have permeability less than the permeability of free space are known as

A

Ferromagnetic

B

Paramagnetic

C

Diamagnetic

D

Bipolar

Permeability in a magnetic circuit corresponds to_________ in an electric circuit.

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