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WB JEE 2020 Physics - Magnetism Question 32 English
As shown in the figure, a wire is bent to form a D-shaped closed loop, carrying current I, where the curved part is a semi-circle of radius R. The loop is placed in a uniform magnetic field B, which is directed into the plane of the paper. The magnetic force felt by the closed loop is
A
zero
B
IRB
C
2IRB
D
$${1 \over 2}$$ IRB
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WB JEE 2020 Physics - Current Electricity Question 32 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
$${\left( {\sqrt 3 + 1} \right)R}$$
3
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WB JEE 2020 Physics - Alternating Current Question 11 English
When a DC voltage is applied at the two ends of a circuit kept in a closed box, it is observed that the current gradually increases from zero to a certain value and then remains constant. What do you think that the circuit contains?
A
A resistor alone
B
A capacitor alone
C
A resistor and an inductor in series
D
A resistor and a capacitor in series
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Consider the circuit shown.

WB JEE 2020 Physics - Current Electricity Question 33 English
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
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