Question Detail
newton is used to measure
- Speed
- Volume
- Force
- Area
Answer: Option C
1. What is escape velocity ?
- Escape velocity is the maximum velocity with which a body should be projected from the surface of earth so it do not go beyond gravitational field of earth.
- Escape velocity is the minimum velocity with which a body should be projected from the surface of earth so it do not go beyond gravitational field of earth.
- Escape velocity is the minimum velocity with which a body should be projected from the surface of earth so as it goes out of gravitational field of earth and never return to earth.
- Escape velocity is the maximum velocity with which a body should be projected from the surface of earth so as it goes out of gravitational field of earth and never return to earth.
Answer: Option C
2. Which instrument is used to measure changes in volume of substances ?
- Dyanamo
- Dilatometer
- Cyclotron
- Electroscope
Answer: Option B
Explanation:
Dyanamo - is used to convert mechanical energy into electrical energy,
Cyclotron - is a charged particle accelerator which can accelerate charged particles to high energies,
Electroscope - is used to detect the presence of an electric charge.
3. The incident ray, reflected ray and normal to the reflecting surface at the incident point all never lie in same plane.
- True
- False
Answer: Option B
4. 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.
5. What is unit of Work and Energy ?
- Joule
- kilogram
- amphere
- meter
Answer: Option A