Std 8 Science Chapter-4
16 Questions
| Total Attempts: 138
.
Questions and Answers
- 1.The rate of flow of an electric charge is known as
- A.
Electric potential
- B.
Electric current
- C.
None of these
- D.
Option 4
- 2.The SI unit of electric current is
- A.
Ohm
- B.
Volt
- C.
Ampere
- D.
Options
- 3.Water in the waterfall flows from higher level to the lower level because of------
- A.
Gravitational attraction
- B.
potential differences
- C.
None of these
- D.
Option 4
- E.
Option 5
- 4.In an electric circuit electrons flow from a point of------ potential
- A.
Lower
- B.
Higher
- C.
Very low
- D.
Option 4
- 5.The differences between the electrostatic potentials of the positive end and the negative ends of an electric cell is the------ of cell
- A.
Unit potential differences
- B.
Potential differences
- C.
None of these
- D.
Option 4
- E.
Option 5
- 6.Tree electric cell of potential differences 1.5 v each have been connected as a battery the potential differences of the battery will be -------v
- A.
6.5V
- B.
7.5V
- C.
4.5V
- D.
Option 4
- 7.An electric current flowing in a wire creates -----around the wire
- A.
Magnetism
- B.
Copper
- C.
Lithium
- D.
Option 4
- 8.The SI unit of force is-----
- A.
Dyne
- B.
Newton
- C.
Joule
- D.
Option 4
- 9.------ are used in our radiosets Wall clocks and torches
- A.
Dry cell
- B.
Electric cell
- C.
Lead acid cell
- D.
Option 4
- 10.------Cell are used in cars trucks motorcycles
- A.
Ni- cd cell
- B.
Electric cell
- C.
Lead acid cell
- D.
Option 4
- 11.Water or a liquid flows from a higher level to a lower level
- A.
True
- B.
False
- 12.When lightning strikes the ground from cloud a large current does not flows
- A.
True
- B.
False
- 13.The dry cell are used in our radio sets
- A.
True
- B.
False
- 14.Lead acid cell are used in clock and torches
- A.
True
- B.
False
- 15.The system of coil and the screw is called an electromagnet
- A.
True
- B.
False
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