Assertion -The drift speed of electrons in metals is small in the order of a few mm-s and the charge of an electron is also very small - 1-6- 10-19C- yet we can obtain a large current in a metal- Reason- At room temperature- the thermal speed of electron is very high about 107 times the drift speed-

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Trend in Electron Affinity

Assertion :Th...

Question

Assertion :The drift speed of electrons in metals is small (in the order of a few mm/s) and the charge of an electron is also very small $(= 1.6 \times 10^{- 19} C)$ , yet we can obtain a large current in a metal. Reason: At room temperature, the thermal speed of electron is very high (about $10^{7}$ times the drift speed).

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Assertion is correct but Reason is incorrect

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is incorrect but Reason is correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Suggest Corrections

Similar questions

Q. Statement 1: The drift speed of electrons in metals is small (in the order of a few mm/s) and the charge of an electron is also very small (

1.6 \times 10^{- 19} C

), yet we can obtain a large current in a metal.

Statement 2: At room temperature, the thermal speed of electrons is very high (about

10^{7}

times the drift speed)

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum

{2n}^{2}

electrons.

Q. Assertion : In the bonding molecular orbital (MO) of

H_{2}

, the electron density is increased between the nuclei.
Reason : The bonding MO is

ψ_{A} + ψ_{B}

, which shows destructive interference of the combining electron waves.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Join BYJU'S Learning Program