Moving Coil Microphone

Q.

The American inventor who invented gramophone is

1. Einstein

2. Edison

3. Newton

4. Archimedes

Q. The oscillator frequency of a cyclotron is 10MHz. what should be the operating magnetic field for acclerating proton?

Q.

Pick out the parts of a moving coil microphone from the options

1. Permanent Magnet

2. Diaphragm

3. Voice Coil

4. Armature

Q. Which part of the moving coil microphone is the moving part?

1. Permanent magnet
2. Diaphragm
3. Coils mounted on suspension
4. All parts of the microphone move

Q.

Think about a moving coil microphone. Then, with reference to it, pick out the odd one from the following given options.

1. Diaphragm

2. Slip rings

3. Permanent magnet

4. Voice coil

Q. Which of the following is/are the moving part/s of the moving coil microphone?

1. Permanent magnet
2. Diaphragm
3. Coils
4. All parts of the microphone move

Q. I coil is rotated in a magnetic field The frequency of change in its induced emf is

Q.

Pick out the devices from the following options which convert the sound energy in to the electrical energy.

1. Capacitor microphones

2. Silicon microphones

3. Carbon microphones

4. Ribbon microphones

Q.

Name a device that converts sound waves into electrical signals.

1. Solenoid

2. Electric generator

3. Microphone

4. Transformer