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- 1. Multiple-choice30 seconds1 pt
The measurement of was possible because of an instrument made by
J Perrin
Edison
Dalton
J.J. Thomson
- 2. Multiple-choice30 seconds1 pt
value comes out to be:
x
x
x
x
- 3. Multiple-choice30 seconds1 pt
By magnetic field, cathode rays are deflected in
straight path
circular path
there is no path
- 4. Multiple-choice1 minute1 ptWhat is an ion?A Charged AtomA Large AtomA Small AtomA Cute Atom
- 5. Multiple-choice1 minute1 pt
In a magnetic field, the ratio of an electron’s charge to its mass is equal to the ratio of the electron’s velocity divided by the product of the magnetic field strength and the radius of the electron’s _______ path.
Linear
Circular
Straight
opposite
- 6. Multiple-choice30 seconds1 pt
What did jj thomson discover
proton
nucleus
electron
neutron
- 7. Multiple-choice30 seconds1 pt
The value in kg of the mass of an electron is?
1.602 x 10-19
9.11 x 10-19
9.11 x 10-31
9.11 x 1031
