Jobs By Abekus

Electromagnetic-theory Questions Set 49:

Quiz Mode

What is the Laplacian of a magnetic vector potential?

-μJ

-μI

-μB

-μH

Solution:

Using Maxwell's equations, which of the following quantities cannot be calculated directly?

Solution:

By looking at which part of a motor, can it be easily confirmed that the motor is a DC motor?

Frame

Shaft

Commutator

Stator

Solution:

What force is experienced by an electromagnetic wave in a conductor?

Electrostatic force

Magnetostatic force

Lorentz force

Electromotive force

Solution:

An AC voltage is represented by E = 220 sin(2π × 50t) V and is applied across a resistance of 110 Ω. The heat produced in 7 minutes is

11 × 10³ cal

22 × 10³ cal

33 × 10³ cal

25 × 10³ cal

Solution:

A battery of 16 volts and internal resistance of 2 ohms is connected to an external resistance R. Find the value of current that results in maximum power in the circuit.

8 A

2 A

16 A

4 A

Solution:

Buses, trains, trolleys, hoists, and cranes require high starting torque and therefore make use of which type of motor?

(a) DC series motor

(b) DC shunt motor

(d) All of the above motors

Solution:

Three infinite uniform sheets of charge are located in free space as follows: 3 nC/m² at z = -4, 6 nC/m² at z = 1, and -8 nC/m² at z = 4. What is the electric field at point P(2, 5, -5)?

56.47 a_z

-56.47 a_z

56.47 a_y

-56.47 a_y

Solution:

The electric field intensity at the surface of a conductor is entirely normal to it and is?

equal to ε times the surface charge density at that point

equal to the surface charge density at that point

equal to 1/ε times the surface charge density at that point

cannot be calculated

Solution:

Which of the following statements about light and sound waves is true?

Both light and sound waves can travel in vacuum

Both light and sound waves in air are transverse

The sound waves in air are longitudinal while the light waves are transverse

Both light and sound waves in air are longitudinal

Electromagnetic-theory Questions Set 49:

What is the Laplacian of a magnetic vector potential?

Solution:

Using Maxwell's equations, which of the following quantities cannot be calculated directly?

Solution:

By looking at which part of a motor, can it be easily confirmed that the motor is a DC motor?

Solution:

What force is experienced by an electromagnetic wave in a conductor?

Solution:

An AC voltage is represented by E = 220 sin(2π × 50t) V and is applied across a resistance of 110 Ω. The heat produced in 7 minutes is

Solution:

A battery of 16 volts and internal resistance of 2 ohms is connected to an external resistance R. Find the value of current that results in maximum power in the circuit.

Solution:

Buses, trains, trolleys, hoists, and cranes require high starting torque and therefore make use of which type of motor?

Solution:

Three infinite uniform sheets of charge are located in free space as follows: 3 nC/m² at z = -4, 6 nC/m² at z = 1, and -8 nC/m² at z = 4. What is the electric field at point P(2, 5, -5)?

Solution:

The electric field intensity at the surface of a conductor is entirely normal to it and is?

Solution:

Which of the following statements about light and sound waves is true?

Solution:

Related Question Sets:

Related Topics: