At some instant, the current in the circuit shown below is 1 A, and it is decreasing at a rate of \( 10^2 \text{ A/s} \). The value of the potential difference \( (V_P - V_Q) \) at that instant is:

Two point charges \( +4 \mu C \) and \( -2 \mu C \) are placed at a certain distance in air. They experience an attractive force \( F \). If they are brought in contact with each other and then separated to the same distance, the new repulsive force between them will be :

A cell of emf 3 V and internal resistance 0.1 \(\Omega\) is connected to a 3.9 \(\Omega\) external resistance. What will be the potential difference across the terminals of the cell ?

Two point charges \( 2 \, \mu\text{C} \) and \( 3 \, \mu\text{C} \) are placed at a distance of 5 cm from each other. The magnitude of the electrostatic force between them is:

An e.m.f. \( e_s = 50 \sin(314t) \) is applied across a pure capacitor of \( 637 \ \mu\text{F} \).
The instantaneous current \( I \) is:

Identify the correct statements:
(A) A magnetic field exerts force on a moving charge and not on a stationary charge.
(B) A moving charge produces a magnetic field.
(C) The magnetic field at a point on the axis of a current element is zero.
(D) Magnetic field \( \vec{B} \) is tangential to a magnetic field line.
Choose the correct answer from the options given below:

At what speed should a galaxy move with respect to earth so that spectral line of \( 600.0 \text{ nm} \) appears as \( 600.6 \text{ nm} \) ?

Answer the question on basis of passage given below :
Molecular nitrogen is very little reactive chemically. During lightning discharge, atmospheric nitrogen and oxygen combines to form nitric oxide which also combines with oxygen to form nitrogen dioxide. Both NO and \(NO _2\) constitute smog which is very poisonous. It can cause burning sensasion in the eyes and adversely affect respiratory system.
What is the colour of nitrogen dioxide.

There are two thin parallel charged sheets having surface charge density \( \sigma \) placed at a small distance apart. Which of the following statements are correct?
(A) If both the sheets are positively charged, then the electric field between them is \( \sigma/\epsilon_0 \)
(B) If both the sheets are negatively charged, then the electric field between them is \( \sigma/\epsilon_0 \)
(C) If the left sheet is positively charged and the right sheet is negatively charged the field between them is \( \sigma/\epsilon_0 \)
(D) If the right sheet is positively charged and the left sheet is negatively charged then the field between them is \( \sigma/\epsilon_0 \)
Choose the correct answer from the options given below:

Observe the table and answer the given question :

List – l	List – II
(A) CGA	(l) Leucine
(B) CUA	(II) Lysine
(C) GUA	(III) Arginine
(D) AAA	(IV) Valine

Choose the correct answer from the options given below:

A runs 9 times slower than B. If B gives A a start of 80 meters, how far must be the winning post on the tracks so that A and B reach there at the same time?

The solution set of the inequality \(2x + 3y < 4\) is :

A 15 cm wire carrying a current of 2 A is placed inside a current-carrying solenoid, perpendicular to its axis. The magnetic force acting on the wire is \( 20 \times 10^{-2} \text{ N} \). The magnetic field inside the solenoid is :