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Question Detail
What is unit of Electrical Capacity ?
- henry
- farad
- volt
- ohm
Answer: Option B
Explanation:
henry is unit of Magnetic Induction,
volt is unit of Potential Difference,
ohm is unit of Electric Resistance.
1. Harry Brearley has invented
- Electric iron
- Electromagent
- Stainless Steel
- Gramophone
Answer: Option C
Explanation:
Harry Brearley of England has invented Stainless Steel in 1913,
Electric iron has been invented by H.W. Seeley of USA in 1882,
Electromagent has been invented by W.Sturgeon of England in 1824,
Gramophone has been invented by T.A. Edison of USA in 1878.
2. Marie and Pierre Curie invented
- Radio
- Radium
- Radar
- Refrigerator
Answer: Option B
Explanation:
Marie and Pierre Curie of France invented Radium in 1898,
Radio was invented by G. Marconi of England in 1901,
Radar was invented by Dr. A.H. Taylor and L.C. Young of USA in 1922,
Refrigerator was invented by J. Harrison and A. Catlin of Britain in 1834.
3. What is the maximum value of deforming force upto which a material shows elastic property and above which the material loses it ?
- Elasticity
- Strain
- Elastic Limit
- Stress
Answer: Option C
4. What is unit of Work and Energy ?
- Joule
- kilogram
- amphere
- meter
Answer: Option A
5. Who discovered Diode Bulb ?
- Henry Becquerel
- Sir J.S. Fleming
- Lee De Forest
- Archemedes
Answer: Option B
Explanation:
Sir J.S. Fleming discovered Diode Bulb in 1904,
Lee De Forest discovered Triode Bulb in 1906,
Archemedes discovered laws of floatation in 1827,
Henry Becquerel discovered Radioactivity in 1896.
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