When dividing an inequality by a negative number, remember that the direction of the inequality reverses. This is an important rule to consider when solving inequalities involving negative divisors.
The correct answer is: (B): \( \frac{a}{x} > \frac{b}{x} \)
We are given that \( a \), \( b \), and \( x \) are real numbers such that \( a < b \) and \( x < 0 \). We are tasked with determining the relationship between \( \frac{a}{x} \) and \( \frac{b}{x} \).
Step 1: Understanding the implications of \( a < b \) and \( x < 0 \)
We are given that \( a < b \), so initially, it would seem that \( \frac{a}{x} \) should be less than \( \frac{b}{x} \). However, since \( x < 0 \), we must consider how dividing by a negative number affects the inequality.
Step 2: Dividing by a negative number
When you divide both sides of an inequality by a negative number, the direction of the inequality reverses. So, dividing \( a < b \) by the negative number \( x \) gives:
Step 3: Conclusion
Thus, since \( x < 0 \), the inequality reverses, and we have \( \frac{a}{x} > \frac{b}{x} \), which means the correct answer is (B): \( \frac{a}{x} > \frac{b}{x} \).
You are given a dipole of charge \( +q \) and \( -q \) separated by a distance \( 2l \). A sphere 'A' of radius \( R \) passes through the centre of the dipole as shown below and another sphere 'B' of radius \( 2R \) passes through the charge \( +q \). Then the electric flux through the sphere A is