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The freauency of one of the lines in Paschen series of a hydrogen atom is 2.34 imes {10^{14}} Hz. The quatum number, {n_2} which produces this transitions is – a) Three b) Four c) Six d) Five ...

The factors of 12x2 yz are a) 1, 5x, 7y, z b) 4x2, 3y, z c) 12y, x, x3 d) 9yz, 4x2 ...

If the HCF and LCM of 2 numbers are reciprocal of each other, then the product of the numbers equals a) 0 b) 1 c) -1 d) 2 ...

An atom of one element A has four elements in its outermost shell, and that of B has six electrons in the outermost shell. The formula of the compound formed by these two will be A2B AB2 A2B3 A3B2 Your Answer d Correct Answer ...

Let f(x)=(1+{{b}^{2}}){{x}^{2}}+2bx+1 and m(b) the minimum value of f(x) for a given b. As b varies, the range of m(b) is a) [0,,1] b) left( 0,left. frac{1}{2} ight] ight. c) left[ frac{1}{2},,,1 ight] d) (0,,1] ...

2)An atom X is represented as follows . The numbers of protons, electrons and neutrons in this atom are: a.21, 21, 24 b.21,21,23 c.20,20,24 d.20,20,23 Your Answer a Correct Answer b Your Score -1 How is that possible? Please ...

A thin spherical conducting shell of radius R has a charge q. Another charge Q is placed at the centre of the shell. The electrostatic potential at a point P a distance frac{R}{2} from the centre of the shell is a) frac{(q+Q) ...

Find the polynomial as depicted by the following graph ? *Image* a) f(x) = x2 + 6x -1 b) f(x) = x2 - 6x + 5 c) f(x) = x2 - 5x + 6 d) f(x) = - x2 + 5x + 6 ...

Which of the following nos. is between 0.1123476 and 0.1123571? 0.112523 0.1123473 0.1123473 Both a and b Your Answer Not Attempted Correct Answer c how can 0.112473 lie between the given nos.? and please give the right answe ...

Which of the following nos. is between 0.1123476 and 0.1123571? 0.112523 0.1123473 0.1123473 Both a and b Your Answer Not Attempted Correct Answer c since the option b and c are same which will the right answer?and what will ...

If the body covers one-third distance at speed v1, next one third at speed v2 and last one third at speed v3, then average speed will be a) frac{{{upsilon }_{1}},{{upsilon }_{2}}+{{upsilon }_{2}},{{upsilon }_{3}}+{{upsilon }_ ...

A car A is travelling on a straight level road with a uniform speed of 60 km/h. It is followed by another car B which is moving with a speed of 70 km/h. When the distance between them is 2.5 km, the car B is given a decelerat ...

A cube of a metal is given a positive charge Q. For the above system, which of the following statements is true a) Electric potential at the surface of the cube is zero b) Electric potential within the cube is zero c) Electri ...

Find all numbers for which the product of all its factors (other than itself) is equal to the number itself. ...

A force of 40N acts on 4cm2. What is value of pressure in N/m2? a)105 b)104 c)103 d)106 ...

The circumference of the front wheel of a cart is 30 ft long and that of the back wheel is 36 ft long. What is the distance travelled by the cart, when the front wheel has done five more revolutions than the rear wheel? 750Ï€ ...

Why is the value of μ greater in sliding friction than rolling friction? ...

Can rolling friction be ever static? ...

Why is static friction more than kinetic friction? Advance thanks to the person who can help me. Thanks, Bye, Angikar ...

Why do elements like iron, nitrogen, phosphorus or copper have variable valencies? Thanks to the person who can help me in advance. Thanks, Bye, Angikar ...

The sum of the three sides of a triangle ABC is 10 cm. Angle B = 60 degrees Angle C = 45 degrees. How can we construct it? Please respond with all steps in detail. Thanks to the person who can help me in advance. Thanks, Bye, ...

f(x)=cos sqrt{x}, correct statement is a) f(x) is periodic & its period =sqrt{2}pi b) f(x) is periodic & its period =4{{pi }^{2}} c) f(x) is periodic & its period =sqrt{pi } d) f(x) is not periodic ...

If f(x) = frac{1}{{1 - x}} , then the derivative of the composite function f[f{ f(x)} ] is equal to a) 0 b) 1/2 c) 1 d) 2 ...

If diagonal and area of rectangle are 25 m and 168 , then what is the length of the rectangle? 17m 31m 12m 24m ...

A regular hexagon is inscribed in a circle of radius r cms. What is the perimeter of the regular hexagon? 3r 6r r√72 9r ...

3)Calculate the current in a wire if 900 C of charge passes through it in 10 minutes. 2A 5A 10A None of these Your Answer d Correct Answer b A=C/t HERE C=900C AND t= 10*60s THEREFORE A=900/600A =1.5A THEN HOW MY ANSWER IS WRO ...

The circumference of the front wheel of a cart is 30 ft long and that of the back wheel is 36 ft long. What is the distance traveled by the cart, when the front wheel has done five more revolutions than the rear wheel? 750Ï€ ...

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