STD 8 Science Chapter-4

16 Questions | By Kalpeshpatil181 | Last updated: Mar 15, 2022 | Total Attempts: 173

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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