Question
Which of the following statements about magnetic field
lines is correct?Solution
Magnetic field lines are a visual representation of the magnetic field. They have both magnitude and direction. The relative strength of the magnetic field is shown by the closeness of the field lines, not their intersections. If two magnetic field lines were to cross, it would imply two directions at a single point, which is impossible. Field lines conventionally emerge from the north pole and merge at the south pole of a bar magnet.
The average of three numbers a, b and c is 2 more than c. The average of a and b is 48. If d is 10 less than c, then the average of c and d is:
If the sum of three numbers is zero, then which of the options below will always be equal to the value of the sum of the cubes of those numbers?
If  x = 19 , find x 5 - 20  x 4 + 20  x 3 - 20x 2 + 20x  - 20 = ?
Given that x8-34x4+1=0, x>0. What is the value of (x3+ x-3)?
If x2a = y2b =z2c ≠ 0 and x2 = yz, then the value of (ab + bc + ca) /bc is :
when x =4 and y =-6 then find the value of 27x³ +58x²y +31xy² +8y³?
Given that x = 80, y = -35 and z = -45, Determine the value of [(x³ + y³ + z³)/10³]
22% of ‘x’ is equal to 66% of ‘y’, then find the value of x: y.
If, 4x + y = 10, and 2xy = 8, and 4x > y, then find the value of 64x³ – y³.
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