1
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
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WB JEE 2023 Physics - Heat and Thermodynamics Question 3 English

Two substances A and B of same mass are heated at constant rate. The variation of temperature $$\theta$$ of the substances with time t is shown in the figure. Choose the correct statement.

A
Specific heat of A is greater than that of B.
B
Specific heat of B is greater than that of A.
C
Both have same specific heat.
D
None of the above is true.
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
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WB JEE 2023 Physics - Electrostatics Question 7 English

Consider a positively charged infinite cylinder with uniform volume charge density $$\rho > 0$$. An electric dipole consisting of + Q and $$-$$ Q charges attached to opposite ends of a massless rod is oriented as shown in the figure. At the instant as shown in the figure, the dipole will experience,

A
a force to the left and no torque.
B
a force to the right and a clockwise torque.
C
a force to the right and a counter clockwise torque.
D
no force but only a clockwise torque.
3
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
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WB JEE 2023 Physics - Electrostatics Question 4 English

A thin glass rod is bent in a semicircle of radius R. A charge is non-uniformly distributed along the rod with a linear charge density $$\lambda=\lambda_0\sin\theta$$ ($$\lambda_0$$ is a positive constant). The electric field at the centre P of the semicircle is,

A
$$-\frac{\lambda_{o}}{8 \pi \varepsilon_{o} R} \hat{j}$$
B
$$\frac{\lambda_{o}}{8 \pi \varepsilon_{o} R} \hat{j}$$
C
$$\frac{\lambda_{\mathrm{o}}}{8 \pi \varepsilon_{\mathrm{o}} \mathrm{R}} \hat{\mathrm{i}}$$
D
$$-\frac{\lambda_{\mathrm{o}}}{8 \pi \varepsilon_{\mathrm{o}} R} \hat{\mathrm{i}}$$
4
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
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WB JEE 2023 Physics - Current Electricity Question 3 English

12 $$\mu$$C and 6 $$\mu$$C charges are given to the two conducting plates having same cross-sectional area and placed face to face close to each other as shown in the figure. The resulting charge distribution in $$\mu$$C on surfaces A, B, C and D are respectively,

A
9, 3, $$-$$3, 9
B
3, 9, $$-$$9, 3
C
6, 6, $$-$$6, 12
D
6, 6, 3, 3
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