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Explore DC Motors and Generators

Authored by RanjanKumar Naik

Engineering

1st Grade

Used 2+ times

Explore DC Motors and Generators
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15 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

What does a DC motor do?

A DC motor generates electrical energy from mechanical motion.

A DC motor converts electrical energy into mechanical motion.

A DC motor stores energy in batteries for later use.

A DC motor regulates temperature in electrical devices.

2.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

Which part of a DC motor rotates?

Rotor

Field coil

Commutator

Stator

3.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

What is the main function of a DC generator?

The main function of a DC generator is to convert mechanical energy into direct current electrical energy.

To regulate voltage levels in a circuit.

To store electrical energy for later use.

To convert alternating current into mechanical energy.

4.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

What is a common use for DC motors?

Home appliances and kitchen gadgets.

Medical devices and surgical tools.

Office equipment and stationery supplies.

Electric vehicles and robotics.

5.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

How do you control the speed of a DC motor?

Increase the motor's weight

Connect the motor directly to a battery without control

Use a higher frequency AC supply

Control the speed by varying voltage, using PWM, or adjusting resistance.

6.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

What is the efficiency of a DC machine?

The efficiency of a DC machine is typically around 30% to 50%.

The efficiency of a DC machine is always 100%.

The efficiency of a DC machine is typically between 70% to 90%.

The efficiency of a DC machine is below 50%.

7.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

What is the working principle of a DC motor?

A DC motor operates by using alternating current to create motion.

A DC motor generates power through solar energy conversion.

A DC motor functions by storing mechanical energy in a flywheel.

A DC motor works by converting direct current electrical energy into mechanical energy through electromagnetic interactions.

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