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- 1. Multiple Choice
The no of electrons present in 1C :
0.625X 1018
6.25 X 1018
62.5 X 1018
625 x 1018
- 2. Multiple Choice
What subatomic particles would you find in the nucleus of an atom?
Protons only
Protons and Neutrons
Neutrons and Electrons
Protons and Electrons
- 3. Multiple Choice
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
A positive charge.
A neutral charge
A negative charge
No charge at all
- 4. Multiple Choice
The charge carried by 12.5 X 10^8 electrons :
2 X 10-10 C
2.5 X 10-10 C
0.25 X 10-10 C
0.2 X 10-10 C
- 5. Multiple Choice
The Total Charge on an alpha particle is :___
-3.2 X 10-19C
+3.2 X 10-19C
32.0 X 10-19C
-32 X 10-19 C
- 6. Multiple Choice
A billion electrons are added to a body, its charge becomes :
1.6 X 10-19 C
1.6 X 10-18 C
-1.6 X 10-10 C
-1.6 X 10-28 C
- 7. Multiple Choice
when 1014 electrons are removed from a neutral metal sphere, the charge on the sphere becomes:
16 X 10-6 C
-16X 10-6 C
32 10-6 C
-32X 10-6 C
- 8. Multiple Choice
A soap bubble is given a negative charge then
its radius :(a)
Decreases
increases
remains un-changed
insufficient information.
- 9. Multiple Choice
A polythene piece rubbed with wool is found to have a negative charge of 3.2 × 10–7 C. The number of electrons transferred :_________
1.875 X 1013
1.875 X 1011
18.75 X 1012
1.875 X 1012
- 10. Multiple Choice
A polythene piece rubbed with wool is found to have a negative charge. Is there a transfer of mass from wool to polythene?
No
Yes
In-sufficient information
none of the above
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