1
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
Change Language

A quantity $X$ is given by $\varepsilon_0 L \frac{\Delta V}{\Delta t}$, where $\varepsilon_0$ is the permittivity of free space, $L$ is the length, $\Delta V$ is a potential difference and $\Delta t$ is a time interval. The dimension of $X$ is same as that of

A
Resistance
B
Charge
C
Voltage
D
Current
2
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
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A diode is connected in parallel with a resistance as shown in Figure. The most probable current (I) - voltage (V) characteristic is

WB JEE 2025 Physics - Electronic Devices Question 3 English

A
WB JEE 2025 Physics - Electronic Devices Question 3 English Option 1
B
WB JEE 2025 Physics - Electronic Devices Question 3 English Option 2
C
WB JEE 2025 Physics - Electronic Devices Question 3 English Option 3
D
WB JEE 2025 Physics - Electronic Devices Question 3 English Option 4
3
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
Change Language

The minimum wavelength of Lyman series lines is $P$, then the maximum wavelength of these lines is

A
$\frac{4 P}{3}$
B
$2 P$
C
$\frac{2 P}{3}$
D
$\infty$
4
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
Change Language

An electron in Hydrogen atom jumps from the second Bohr orbit to the ground state and the difference between the energies of the two states is radiated in the form of a photon. This photon strikes a material. If the work function of the material is 4.2 eV , then the stopping potential is (Energy of electron in $n$-th orbit $\left.=-\frac{13 \cdot 6}{n^2} \mathrm{eV}\right)$

A
2V
B
4V
C
6V
D
8V
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