1
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Longitudinal waves cannot

A
have a unique wave length
B
have a unique wave velocity
C
transmit energy
D
be polarized
2
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

A $$2 \mathrm{~V}$$ cell is connected across the points $$\mathrm{A}$$ and $$\mathrm{B}$$ as shown in the figure. Assume that the resistance of each diode is zero in forward bias and infinity in reverse bias. The current supplied by the cell is

WB JEE 2024 Physics - Electronic Devices Question 1 English

A
0.5 A
B
0.2 A
C
0.1 A
D
0.25 A
3
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

A charge Q is placed at the centre of a cube of sides a. The total flux of electric field through the six surfaces of the cube is

A
$$ \frac{6 \mathrm{Qa}^2}{\epsilon_0} $$
B
$$ \frac{\mathrm{Q} \mathrm{a}^2}{6 \epsilon_0} $$
C
$$ \mathrm{Q} / \epsilon_0 $$
D
$$ \mathrm{Q} \mathrm{a}^2 / \epsilon_0 $$
4
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

The elastic potential energy of a strained body is

A
stress $$\times$$ strain
B
stress / strain
C
stress $$\times$$ strain / volume
D
$$\frac{1}{2} \times$$ stress $$\times$$ strain $$\times$$ volume
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