Explanation:
$\vec{\text{F}}=\text{q}(\text{V}\times\text{B})$
Charge proton is poritive = e
Fp = evB
Charge of electron is negative = -e
Fe = -evB
They will be deviated by different angles and Hence separate.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A radioactive nucleus is being produced at a constant rate a per second. Its decay constant is l. If N0 are the number of nuclei at time t = 0, then maximum number of nuclei possible are
|
(a) |
(b) |
(c) N0 |
(d) |
Assertion : A transistor amplifier in common emitter configuration has a low input impedence.
Reason : The base to emitter region is forward biased.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
$\text{v}_\text{A}>\text{v}_\text{B}>\text{v}_\text{C}.$
$\text{v}_\text{A}<\text{v}_\text{B}<\text{v}_\text{C}$
$\text{v}_\text{A}=\text{v}_\text{B}=\text{v}_\text{C}$
$\text{v}_\text{B}=\frac{1}{2}(\text{v}_\text{A}+\text{v}_\text{C})$
An electron moving with a speed u along the positive x-axis at y = 0 enters a region of uniform magnetic field 
which exists to the right of y-axis. The electron exits from the region after some time with the speed v at co-ordinate y, then
|
(a) v > u, y < 0 |
(b) v = u, y > 0 |
(c) v > u, y > 0 |
(d) v = u, y < 0 |
The work function of a photoelectric material is 3.3 eV. The threshold frequency will be equal to
|
(a) 8 |
(b) 8 |
(c) 8 |
(d) 8 |
The focal lengths for violet, green and red light rays are 
and 
respectively. Which of the following is the true relationship
|
(a) |
(b) |
(c) |
(d) |
A radioactive sample with a half life of 1 month has the label : “Activity=2 micro curies on 1.8.1991.'' What will be its activity two months later
|
(a) 1.0 micro curies |
(b) 0.5 micro curies |
(c) 4 micro curies |
(d) 8 micro curies |
