The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

Which of the following are the properties of an electron? 1) Electron is a constituent of cathode ray 2) Electron is a negatively charged particle 3) The mass of the electron is equal to the mass of the proton 4) Electron is deflected by the electric field but not by magnetic field Select the correct answer using the code given below:

A

1 and 2 only

B

1, 2 and 3

C

3 and 4

D

1 and 4

Which of the following are the properties of a proton? 1. Proton is a positively charged particle. 2. Protons are found outside the nucleus of an atom. 3. The charge of a proton is equal and opposite to the charge of an electron.

A

1 and 2 only

B

1, 2 and 3

C

2 and 3 only

D

1 and 3 only

The mass difference between the pair of mirror nuclei $${}_6^{11}C$$ and $${}_5^{11}B$$ is given to be Δ MeV/c². According to the semi-empirical mass formula, the mass difference between the pair of mirror nuclei $${}_9^{17}F$$ and $${}_8^{17}O$$ will approximately be (rest mass of proton m_p = 938.27 MeV/c² and rest mass of neutron m_n = 939.57 MeV/c²)

A

1.39Δ MeV/c²

B

(1.39Δ + 0.5) MeV/c²

C

1.86Δ MeV/c²

D

(1.6Δ + 0.78) MeV/c²

Which of the following statements are correct with regard to Sikhism? (a) From the 1750s onwards the Sikh dals and misals (groups) became more and more powerful, led by individual chiefs (sardars) who organized troops of increasingly, professionally mounted musketeers. (b) There was the tradition of an annual 'Sarbat Singh (1790 - 1839), who established a kingdom in Punjab in the name of the Khalsa. (c) The process was at last checked by Ranjit Singh (1780-1839), who established a kingdom in Punjab in the name of Khalsa. (d) The Gurus were all Khatris, but their principal lieutenants, the Masand were mostly Jatts in the seventeenth century. Choose the correct answer from the options given below:

A

(a), (b) and (d) only

B

(b), (c) and (d) only

C

(a), (b), (c), (d)

D

(c) and (d) only

A uniform magnetic field exists in the plane of paper pointing from left to right as shown in figure. In the field an electron and a proton move as shown. The electron and the proton experience

A

Force both pointing into the plane of paper

B

Force both pointing out of the plane of paper

C

Force pointing into the plane of paper and out of the plane of paper, respectively

D

Force pointing opposite and along the direction of the uniform magnetic field respectively

An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speeds of the electron and the proton are Ve and Vp respectively. Which one of the following relations is correct?

A

V_e > V_p

B

V_e < V_p

C

V_e = V_p

D

Cannot be determined

An electron and a proton starting from rest get accelerated through potential difference of 100kV. The final speeds of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct?

A

Ve > Vp

B

Ve < Vp

C

Ve = Vp

D

Cannot be determined

The Baryon number of proton, the lepton number of proton, the Baryon number of electron and the lepton number of electron are respectively

A

zero, zero, one and zero

B

one, one, zero and one

C

one, zero, zero and one

D

zero, one, one and zero

An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speed of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct?

A

Ve > Vp

B

Ve

C

Ve = Vp

D

Cannot be determined

All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in which neutron is absent.

A

Deuterium

B

Hydrogen

C

Neon

D

Helium

The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

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