Jobs By Abekus

Electromagnetic-theory Questions Set 21:

Quiz Mode

The peak value of an AC voltage on a 220 V mains is:

200√2 V

230√2 V

220√2 V

240√2 V

Solution:

Which of the following can induce the maximum induced voltage in a coil?

1 amp 1 Hz

1 amp 100 Hz

1 amp DC

20 amp DC

Solution:

Which of the following is an example of a fluid with zero divergence?

Expanding air

Air getting compressed

Water

Air escaping from a tire

Solution:

Six identical cells, each with an EMF of 6 volts, are connected in parallel. What is the net EMF across the battery?

6 V

36 V

Between 6 V and 36 V

0 V

Solution:

Find the dipole moment of an electric dipole with charges of +5.2 C and -5.2 C separated by a distance of 7 cm.

1.893 C⋅m

0.364 C⋅m

0.013 C⋅m

0.728 C⋅m

Solution:

The relationship between beam width between first null (BWFN) and half-power beam width (HPBW) is given by:

HPBW = (BWFN)/2

HPBW = 2(BWFN)

HPBW = BWFN

HPBW = 4(BWFN)

Solution:

What are the effects of high cross-polarization in communication applications?

All of the above

Undesired interference in communication applications

Measurement errors in radiometric applications

Affects tracking accuracies in radar applications

Solution:

The speed of a D.C. shunt motor can be increased by

(a) increasing the resistance in armature circuit

(b) increasing the resistance in field circuit

(d) reducing the resistance in the armature circuit

Solution:

A metal surface with a 1-meter radius and surface charge density of 20 coulombs per square meter is enclosed in a 10-meter side cube. The total outward electric displacement normal to the surface of the cube is:

40π coulombs

80π coulombs

10π coulombs

none of these

Solution:

Two equal negative charges q are fixed at the points (0,a) and (0,-a) on the y-axis. A positive charge Q is released from rest at the point (2a,0) on the x-axis. The charge Q will:

Execute simple harmonic motion about the origin.

Move to the origin and remain at rest

Move to infinity.

Execute oscillatory but not simple harmonic motion.

Electromagnetic-theory Questions Set 21:

The peak value of an AC voltage on a 220 V mains is:

Solution:

Which of the following can induce the maximum induced voltage in a coil?

Solution:

Which of the following is an example of a fluid with zero divergence?

Solution:

Six identical cells, each with an EMF of 6 volts, are connected in parallel. What is the net EMF across the battery?

Solution:

Find the dipole moment of an electric dipole with charges of +5.2 C and -5.2 C separated by a distance of 7 cm.

Solution:

The relationship between beam width between first null (BWFN) and half-power beam width (HPBW) is given by:

Solution:

What are the effects of high cross-polarization in communication applications?

Solution:

The speed of a D.C. shunt motor can be increased by

Solution:

A metal surface with a 1-meter radius and surface charge density of 20 coulombs per square meter is enclosed in a 10-meter side cube. The total outward electric displacement normal to the surface of the cube is:

Solution:

Two equal negative charges q are fixed at the points (0,a) and (0,-a) on the y-axis. A positive charge Q is released from rest at the point (2a,0) on the x-axis. The charge Q will:

Solution:

Related Question Sets:

Related Topics: