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The magnetic susceptibility is negative forThe magnetic susceptibility is negative for (1) Diamagnetic material only (2) Paramagnetic material (3) Ferromagnetic material (4) Paramagnetic and ferromagnetic material

Answer: (1) Diamagnetic material only In electromagnetism, magnetic susceptibility is defined as the measure of how much a material will be... View Article

The basic unit of speed is?

The basic unit of Speed is meter per second or m/s. The SI unit of distance is meter(m) and time is second (s). Speed is equal to distance... View Article

Find the LCM of 40, 48 and 45.

By prime factorisation method, we can write the numbers 40, 48 and 45 as: 40 = 2 x 2 x 2 x 5 48 = 2 x 2 x 2 x 2 x 3 45 = 3 x 3 x 5 L.C.M.... View Article

Find the multiplicative inverse of the following. (i) -13 (ii) -13/9 (iii) 1/5 (iv) -5/8 x -3/7 (v) -1 x -2/5 (vi) −1

The multiplicative inverse of: (i) -13 is -1/13 (ii) -13/9 is -9/13 (iii) 1/5 is 5 (iv) -5/8 x -3/7 = 15/56 Therefore, multiplicative... View Article

Factorise the follwing expression p2+6p-16.

Given, p2 + 6p - 16 By splitting the middle term; p2 - 2p + 8p -16 (p2 - 2p) + (8p - 16) p(p-2) + 8 (p - 2) (p-2) (p+8)... View Article

Write the following cubes in expanded form: (i) (2x + 1)^3 (ii) (2a – 3b)^3 (iii) [3x/2 + 1]^3 (iv) [x – 2y/3]^3.

(i) (2x + 1)³ Using identity: (a + b)³ = a³+ b³+ 3ab(a + b) (2x + 1)³ = (2x)³ + 1³ + (3×2x×1)(2x... View Article

Find the zeroes of the polynomial x^2+1/6x-2 and verify the relation between the coefficient and zeroes of the polynomial.

x2 + 1/6(x) - 2 = 0 6x2 + x - 12 = 0 6x2 - 8x + 9x - 12 = 0 (6x2 - 8x) + (9x - 12) = 0 2x(3x - 4) + 3(3x + 4) = 0 (3x - 4)(2x + 3) = 0 x =... View Article

Convert the following ratios to percentages? (a) 3:4 (b) 2:3

(a) Given, the ratio is 3:4 3:4 = 3/4 Percentage = 3/4 x 100 = 3 x 25 = 75% (b) Given, the ratio is 2:3 2:3 = 2/3 Percentage = 2/3 x 100 = 200/3%... View Article

What is formula of x²+y²?

Since we know, (x+y)2 = x2 + y2 + 2xy Therefore, the formula of x2 + y2 is: x2 + y2 = (x+y)2 - 2xy... View Article

Square of 42 without actual multiplication.

Given, the number is 42. We need to square the number 42. We can use the identity: (a+b)2 = a2 + b2 + 2ab, to find the square of 42. 42 = 40 +... View Article

Angle between minute hand and hour hand at 5 oclock is?

At 5 O’clock, the hour hand is at 5 and the minute hand is at 12. Between the two hands, there is 5 hours difference and total we have 12... View Article

In a class of 40 student 1/5 of total number of students like to study English and 2/5 of the total number of students like to study mathematics and the remaining like to study science . How many student like to study English? How many student like to study mathematics? What fraction of total number of student like to study science?

Given, total students = 40 1/5 students like to study English Number of students who like to study English = 1/5 x 40 = 8 2/5 students like to... View Article

A milkman sold two of his buffaloes for Rs 20000 each.On one he made a gain of 5% and on the other a loss of 10%.Find his overall gain or loss.(Find CP of each).

Selling price of 1st buffalo = Rs.20000 He made a gain of 5% in 1st buffalo Cost price of 1st buffalo = (100/105) x 20000 = Rs. 19047.62... View Article

Arrange the following numbers in ascending order: 847, 9754, 8320, 571.

Ascending order:571, 847, 8320, 9754.... View Article

1/2 of 10. How to solve it?

1/2 of 10 (1/2) x 10 Since, 2 x 5 = 10 Therefore, (1/2) x 10 = 5... View Article

Choose the odd one out from given four choices: (a) 13 – 21 (b) 51 – 23 (c) 16 – 24 (d) 19 – 27

Answer: (c) 16 - 24 The odd one from the given choices is 16 - 24. All pairs are odd numbers whereas 16, 24 are even numbers. If a number is... View Article

Linear equation in one variable has? (A) One Solution (B) Two Solution

Answer: (A) One Solution Linear equation in one variable has one solution.... View Article

A man can row 5 kmph in still water.if the river is running at 1kmph,it takes 75min to go to a place and come back. How far is the place?

Let us say, distance = x Upstream Speed = 5 - 1 => 4 Downstream Speed = 5 + 1 => 6 75 minutes in hours = 5/4 hours As per the given... View Article

Solve the solution 1+4+7+10………….+x = 287

Given, 1+4+7+10.............+x = 287 We need to find the value of x. First term,a = 1 Common difference = 4-1 = 3 Sn = 287 Using the... View Article

Ritu can row downstream 20 km in 2 hour, and upstream 4 km in 2 hours. Find her speed of rowing in still water and the speed of the current.

Let, speed of Ritu in still water = x km/hr speed of current = y km/hr Thus, speed downstream =(x+y) km/hr speed upstream =(x−y) km/hr... View Article