12th Class Physics MCQS Chapter 10

The mass of protons is:

1.693 x 10^-27 kg

1.673 x 10^-27 kg 

1.675 x 10^-27 kg

1.673 x 10^-31 kg

Charge on an electron was determined by

Ampere

Millikan

Maxwell

Bohr

The potential difference between the top and bottom of a cloud chamber is of the order of

1 kv

None of above

290 v

400 v

James chadwick discovered:

Proton

Positron

Electron

Neutron

In Wilson cloud chamber, ß-particles leave

Thin and continuous tracks

Thick and continuous tracks

No tracks

Thin and discontinuous tracks

amu =

1.6606 x 10^-31 kg

1.520 x 10^-21 kg

1.06 x 10^-27 kg

1.6606 x 10^-27 kg 

The mass of proton in amu is:

1.7276

1.0007276

1.07276

1.007276

The radio active nuclide ₈₆Ra²²⁸ decays by a series of emissions of three alpha particles and one beta particle. The nuclide X finally formed is:

₈₈X²¹⁵

₈₄X²¹⁶

₈₆X²²²

₆₄X²²⁰

The unit of radioactivity is:

Joule

Bequerel

Henry

Pascal

Which of the following basic force is able to provide an attraction between two neutrons:

Electrostatic and gravitational

Gravitational and strong nuclear

Electrostatic and nuclear b

Only nuclear force