Odd Man Out

Find the odd man out & give the reason

(A)

1. Loud speaker, Microphone, Electric motor, Bar magnet.

2. Armature, coil, Brushes, Electric commutator, Direct current.

3. Fuse, Insulating material, Rubber shoes, Generator.

4. Voltmeter, Ammeter, Galvanometer, Thermometer.

5. Carbon steel, soft iron, chromium steel, alnico.

6. Bulb, electric bell, telephone earpiece, solenoid.

7. Electric iron, geyser, electric bell, electric bulb.

8. Carbon steel, Alnico, Nipermag, copper.

9. Electric water pump, electric iron, Dynamo, electric crane.

10. Fuse, overloading, short circuit, Fire.

11. Loudspeaker, electric clock, geyser, microphones.

Answers:

1. Bar magnet – others are devices in which are form of energy is converted into another.

2. Direct current – others are components of an electric motor & a D.C. generator.

3. Generator – others do not generate electricity.

4. Thermometer – others are used to detect the electrical quantities PD & current.

5. Soft iron – others are hard.

6. Bulb 

7. Geyser 

8. Copper – Is a pure metal while others are alloys.

9. Electric iron 

10 Fuse 

11. Geyser 

(B)

1. Citric acid, formic acid, lactic acid, nitric acid.

2. Sodium, potassium, Calcium, gypsum.

3. Eosin, phenolphthalein, litmus, methyl orange.

4. Sugarcane, vinegar, tamarind, kokum.

5. NaOH, Ca(OH)₂, NH₄ OH, Ba (OH)₂

6. HCl, CH₃COOH, H₂SO₄, HNO₃

7. H₂SO₄, HCl, NH₄OH,HNO₃

Answers:

 1. Nitric acid, (all except HNO₃ are week acids)

2. Gypsum the compound (remaining are elements).

3. Litmus is a natural indicator (all are synthetic indicator)

4. Sugar sweet in taste (other are sour in taste/acidic)

5. NaOH (all except NaOH are weak bases)

6. NH₄OH is alkali (The rest are acids)

Find the odd man out, give the reason, electromagnetism odd man out, science odd man out