AIPMT 2001 | NEET Year Wise Previous Years Questions

MCQ (Single Correct Answer)

A dipole of dipole moment $$\overrightarrow p $$ is placed in uniform electric field $$\overrightarrow E $$ then torque acting on it is given by

$$\overrightarrow \tau = \overrightarrow p .\overrightarrow E $$

$$\overrightarrow \tau = \overrightarrow p \times \overrightarrow E $$

$$\overrightarrow \tau = \overrightarrow p + \overrightarrow E $$

$$\overrightarrow \tau = \overrightarrow p - \overrightarrow E $$

MCQ (Single Correct Answer)

A charge Q$$\mu $$C is placed at the centre of a cube, the flux coming out from each face will be

$${Q \over {6{\varepsilon _0}}} \times {10^{ - 6}}$$

$${Q \over {6{\varepsilon _0}}} \times {10^{ - 3}}$$

$${Q \over {24{\varepsilon _0}}}$$

$${Q \over {8{\varepsilon _0}}}$$

MCQ (Single Correct Answer)

Energy per unit volume for a capacitor having area A and separation d kept at potential difference V is given by

$${1 \over 2}{\varepsilon _0}{{{V^2}} \over {{d^2}}}$$

$${1 \over {2{\varepsilon _0}}}{{{V^2}} \over {{d^2}}}$$

$${1 \over 2}C{V^2}$$

$${{{Q^2}} \over {2C}}.$$

MCQ (Single Correct Answer)

Copper and silicon is cooled from 300 K to 60 K , the specific resistance

decrease in copper but increase in silicon

increase in copper but decrease in silicon

increase in both

decrease in both