1
WB JEE 2020
+1
-0.25 A galvanometer can be converted to a voltmeter of full scale deflection V0 by connecting a series resistance R1 and can be converted to an ammeter of full scale deflection I0 by connecting a shunt resistance R2. What is the current flowing through the galvanometer at its full scale deflection?
A
$${{{V_0} - {I_0}{R_2}} \over {{R_1} - {R_2}}}$$
B
$${{{V_0} + {I_0}{R_2}} \over {{R_1} + {R_2}}}$$
C
$${{{V_0} - {I_0}{R_1}} \over {{R_2} - {R_1}}}$$
D
$${{{V_0} + {I_0}{R_1}} \over {{R_1} + {R_2}}}$$
2
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
$${\left( {\sqrt 3 + 1} \right)R}$$
3
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
4
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
$${\cos ^{ - 1}}\left( {{{eVL} \over {mdv_0^2}}} \right)$$
WB JEE Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
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