1
WB JEE 2020
+1
-0.25

What will be the equivalent resistance between the terminals A and B of the infinite resistive network shown in the figure?
A
$${{\left( {\sqrt 3 + 1} \right)R} \over 2}$$
B
$${{\left( {\sqrt 3 - 1} \right)R} \over 2}$$
C
$$3{R \over 2}$$
D
$${\left( {\sqrt 3 + 1} \right)R}$$
2
WB JEE 2020
+1
-0.25
Consider the circuit shown.

If all the cells have negligible internal resistance, what will be the current through the 2$$\Omega$$ resistor when steady state is reached?
A
0.66 A
B
0.29 A
C
0 A
D
0.14 A
3
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
$${\cos ^{ - 1}}\left( {{{eVL} \over {mdv_0^2}}} \right)$$
4
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
$$3 \times {10^{ - 3}}C$$
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