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Electromagnetic-theory Questions Set 70:

Quiz Mode

The intrinsic impedance of free space is?

576

489

252

377

Solution:

If the power of a wave is 0.01 units, what is its electric field intensity in air?

2 units

7.54 units

2.75 units

7 units

Solution:

Which type of DC motor has the highest no-load speed?

Shunt motor

Series motor

Cumulative compound motor

Differentially compound motor

Solution:

The magnetic field at any point on the axis of a current-carrying coil will be

perpendicular to the axis

zero

at an angle of 45° with the axis

parallel to the axis

Solution:

In general, the wavelength of microwaves is

More than that of radio waves

Less than that of ultraviolet rays

More than that of infrared waves

Less than that of infrared waves

Solution:

What is the approximate distance at which an electromagnetic wave with a frequency of 10 MHz will have the same magnitude for its induction and radiation fields?

5 m

3 m

4 m

2 m

Solution:

If a current I is flowing in a circular coil of radius R, and a current 2I is flowing in another coil B of radius 2R, what is the ratio of the magnetic fields Ba and Bb created by these currents?

1/2

Solution:

A lossless transmission line with a length of 20 cm and a characteristic impedance of 100 Ω is short-circuited. What is the input impedance at the other end of the transmission line at 5 GHz?

Unknown

Inductive

Resistive

Capacitive

Solution:

The following definition correctly describes which of the following options?

"An induced emf around any closed path is equal to the negative of the time rate of change of magnetic flux linkage to that path"

Lenz's Law

Faraday's Law

Both 1 & 2

Ampere's Law

Solution:

Assertion (A): The impedance of a matched load is equal to the characteristic impedance of the transmission line.

Reason (R): A matched termination absorbs all the power incident on it.

Both A and R are correct, and R is the correct explanation of A.

Both A and R are correct, but R is not the correct explanation of A.

A is correct, but R is wrong.

A is wrong, but R is correct.

Electromagnetic-theory Questions Set 70:

The intrinsic impedance of free space is?

Solution:

If the power of a wave is 0.01 units, what is its electric field intensity in air?

Solution:

Which type of DC motor has the highest no-load speed?

Solution:

The magnetic field at any point on the axis of a current-carrying coil will be

Solution:

In general, the wavelength of microwaves is

Solution:

What is the approximate distance at which an electromagnetic wave with a frequency of 10 MHz will have the same magnitude for its induction and radiation fields?

Solution:

If a current I is flowing in a circular coil of radius R, and a current 2I is flowing in another coil B of radius 2R, what is the ratio of the magnetic fields Ba and Bb created by these currents?

Solution:

A lossless transmission line with a length of 20 cm and a characteristic impedance of 100 Ω is short-circuited. What is the input impedance at the other end of the transmission line at 5 GHz?

Solution:

The following definition correctly describes which of the following options?

"An induced emf around any closed path is equal to the negative of the time rate of change of magnetic flux linkage to that path"

Solution:

Assertion (A): The impedance of a matched load is equal to the characteristic impedance of the transmission line.

Reason (R): A matched termination absorbs all the power incident on it.

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 70:

The intrinsic impedance of free space is?

Solution:

If the power of a wave is 0.01 units, what is its electric field intensity in air?

Solution:

Which type of DC motor has the highest no-load speed?

Solution:

The magnetic field at any point on the axis of a current-carrying coil will be

Solution:

In general, the wavelength of microwaves is

Solution:

What is the approximate distance at which an electromagnetic wave with a frequency of 10 MHz will have the same magnitude for its induction and radiation fields?

Solution:

If a current I is flowing in a circular coil of radius R, and a current 2I is flowing in another coil B of radius 2R, what is the ratio of the magnetic fields Ba and Bb created by these currents?

Solution:

A lossless transmission line with a length of 20 cm and a characteristic impedance of 100 Ω is short-circuited. What is the input impedance at the other end of the transmission line at 5 GHz?

Solution:

The following definition correctly describes which of the following options? "An induced emf around any closed path is equal to the negative of the time rate of change of magnetic flux linkage to that path"

Solution:

Assertion (A): The impedance of a matched load is equal to the characteristic impedance of the transmission line. Reason (R): A matched termination absorbs all the power incident on it.

Solution:

Related Question Sets:

Related Topics:

The following definition correctly describes which of the following options?

"An induced emf around any closed path is equal to the negative of the time rate of change of magnetic flux linkage to that path"

Assertion (A): The impedance of a matched load is equal to the characteristic impedance of the transmission line.

Reason (R): A matched termination absorbs all the power incident on it.