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1
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
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WB JEE 2021 Physics - Current Electricity Question 13 English
The carbon resistor with colour code is shown in the figure. There is no fourth band in the resistor. The value of the resistance is
A
24 M$$\Omega$$ $$\pm$$ 20%
B
14 k$$\Omega$$ $$\pm$$ 5%
C
24 k$$\Omega$$ $$\pm$$ 20%
D
34 k$$\Omega$$ $$\pm$$ 10%
2
WB JEE 2021
MCQ (Single Correct Answer)
+2
-0.5
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Two metal wires of identical dimensions are connected in series. If $$\sigma$$1 and $$\sigma$$2 are the electrical conductivities of the metal wires respectively, the effective conductivity of the combination is
A
$$\sigma$$1 + $$\sigma$$2
B
$${{{\sigma _1}{\sigma _2}} \over {{\sigma _1} + {\sigma _2}}}$$
C
$${{2{\sigma _1}{\sigma _2}} \over {{\sigma _1} + {\sigma _2}}}$$
D
$${{{\sigma _1} + {\sigma _2}} \over {2{\sigma _1}{\sigma _2}}}$$
3
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
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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
$${{{V_0} + {I_0}{R_1}} \over {{R_1} + {R_2}}}$$
4
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
WB JEE 2020 Physics - Current Electricity Question 31 English
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
$${\left( {\sqrt 3 + 1} \right)R}$$
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