1
WB JEE 2020
+2
-0.5
A pair of parallel metal plates are kept with a separation d. One plate is at a potential + V and the other is at ground potential. A narrow beam of electrons enters the space between the plates with a velocity v0 and in a direction parallel to the plates. What will be the angle of the beam with the plates after it travels an axial distance L?
A
$${\tan ^{ - 1}}\left( {{{eVL} \over {md{v_0}}}} \right)$$
B
$${\tan ^{ - 1}}\left( {{{eVL} \over {mdv_0^2}}} \right)$$
C
$${\sin ^{ - 1}}\left( {{{eVL} \over {md{v_0}}}} \right)$$
D
$${\cos ^{ - 1}}\left( {{{eVL} \over {mdv_0^2}}} \right)$$
2
WB JEE 2019
+1
-0.25
Five identical capacitors, of capacitance 20$$\mu$$F each, are connected to a battery of 150V, in a combination as shown in the diagram. What is the total amount of charge stored?

A
$$15 \times {10^{ - 3}}C$$
B
$$12 \times {10^{ - 3}}C$$
C
$$10 \times {10^{ - 3}}C$$
D
$$3 \times {10^{ - 3}}C$$
3
WB JEE 2019
+1
-0.25
What is the current I shown in the given circuit?

A
$${V \over {2R}}$$
B
$${V \over {R}}$$
C
$${V \over {16R}}$$
D
$${V \over {8R}}$$
4
WB JEE 2019
+1
-0.25
When the value of R in the balanced Wheatstone bridge, shown in the figure, is increased from 5$$\Omega$$ to 7$$\Omega$$, the value of S has to be increased by 3$$\Omega$$ in order to maintain the balance. What is the initial values of S?

A
2.5$$\Omega$$
B
3$$\Omega$$
C
5$$\Omega$$
D
7.5$$\Omega$$
EXAM MAP
Medical
NEET