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)
+1
-0.25
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WB JEE 2021 Physics - Alternating Current Question 2 English
Consider a pure inductive AC circuit as shown in the figure. If the average power consumed is P, then
A
P > 0
B
P < 0
C
P = 0
D
P এর মান অসীম
3
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
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WB JEE 2021 Physics - Geometrical Optics Question 6 English
The cross-section of a reflecting surface is represented by the equation x2 + y2 = R2 as shown in the figure. A ray travelling in the positive x-direction is directed toward positive y-direction after reflection from the surface at point M. The coordinate of the point M on the reflecting surface is
A
$$\left( {{R \over {\sqrt 2 }},{R \over {\sqrt 2 }}} \right)$$
B
$$\left( { - {R \over 2}, - {R \over 2}} \right)$$
C
$$\left( { - {R \over {\sqrt 2 }},{R \over {\sqrt 2 }}} \right)$$
D
$$\left( {{R \over {\sqrt 2 }}, - {R \over {\sqrt 2 }}} \right)$$
4
WB JEE 2021
MCQ (Single Correct Answer)
+2
-0.5
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For a plane electromagnetic wave, the electric field is given by

$$ \overrightarrow{E} = 90\sin (0.5 \times {10^3}x + 1.5 \times {10^{11}}t)\widehat k$$ V/m. The corresponding magnetic field B will be
A
$$\overrightarrow{B} = 3 \times {10^{ - 7}}\sin (0.5 \times {10^3}x + 1.5 \times {10^{11}}t)\widehat i$$ T
B
$$\overrightarrow{B} = 3 \times {10^{ - 7}}\sin (0.5 \times {10^3}x + 1.5 \times {10^{11}}t)\widehat j$$ T
C
$$\overrightarrow{B} = 27 \times {10^9}\sin (0.5 \times {10^3}x + 1.5 \times {10^{11}}t)\widehat j$$ T
D
$$\overrightarrow{B} = 3 \times {10^{ - 7}}\sin (0.5 \times {10^3}x + 1.5 \times {10^{11}}t)\widehat k$$ T
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