Assertion :If a charged particle enters from outside at right angles in uniform magnetic field.The maximum time spent in magnetic field may be $\frac{π m}{B q}$ Reason: It can complete only semi-circle in the magnetic field.

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

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

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

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

Assertion is correct but Reason is incorrect

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

Both Assertion and Reason are incorrect

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

Open in App

Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
If a charged particle enters from outside at right angles in uniform magnetic field it can complete only half the circle, for which time period will be $\frac{1}{2} \frac{2 π m}{q B}$ .
Hence, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

Suggest Corrections

Similar questions

Assertion: A proton and an $α$ - particle are projected with the same kinetic energy at right angle to a uniform magnetic field, then the $α$ - particle will move along a circular path of smaller radius than the proton.

Reason : $B q v = \frac{m v^{2}}{r}$ holds good for the charged particle moving in a circular path in a uniform magnetic field.

Choose the most appropriate correct option:

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: 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.

Q. Choose the correct option for the given assertion and reason.
Assertion: Two plane mirrors kept at right angle deviate any ray of light by

180^{\circ}

after two successive reflections.
Reason: The above condition is satisfied only for angle of incidence,

i = 45^{\circ}

Q. Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
High biological oxygen demand means low activity of bacteria in water.

Join BYJU'S Learning Program

Assertion :If a charged particle enters from outside at right angles in uniform magnetic field.The maximum time spent in magnetic field may be πmBq Reason: It can complete only semi-circle in the magnetic field.

Assertion :If a charged particle enters from outside at right angles in uniform magnetic field.The maximum time spent in magnetic field may be $\frac{π m}{B q}$ Reason: It can complete only semi-circle in the magnetic field.