Free Printable Sample Test: Class XI

Worksheets

Sample Test: Class XI

Total questions: 7

Worksheet time: 35mins

Name

Class

Date

A block rests on a rought inclined plane making an angle of 30 degress with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the friction on the block is 10 N, the mass of the block (in kg) is (Take g = 10 m/s^2 )

1.6

4.0

2.0

2.5

A box takes 40 N to start moving when the coefficient of static friction is .54. What is the weight of the box?

81 N

18 N

98 N

74 N

Value of friction force acting between a block and floor is?

$\mu N$

$>\mu N$

$0\le f\le\mu N$

A block of mass 0.9 kg is held against a wall by applying a horizontal force of 5 N on the block. If the coefficient of friction between the block and the wall is 0.5, the magnitude of the frictional force acting on the block is

2.5 N

0.98 N

4.9 N

0.49 N

A block rests on an inclines plane. The force of friction acting on the block is (1/n) times. The force required to move the block up the inclined plane with a uniform velocity (n>1). If $\mu$ be the coefficient of friction, then the inclination of the plane with the horizontal is

$\tan^{-1}$ [(n-1)/ $\mu$ ]

$\tan^{-1}$ [ $\mu$ (n-1)]

$\tan^{-1}$ [ $\mu$ /(n-1)]

The correct set of four quantrum for the valence electrons of rubidium atom (Z = 37) is

5, 0, 0, + $\frac{1}{2}$

5, 1 , 0, + $\frac{1}{2}$

5, 1, 1, + $\frac{1}{2}$

5, 0, 1, + $\frac{1}{2}$

A wire of length two units is cut into two parts which are bent respectively to form a square of side = x units and a circle of radius = r units. If the sum of the areas of the square and the circle so formed is minimum, then :

2x = r

2x = ( $\pi$ +4) r

(4 - $\pi$ )x = $\pi$ r

x= 2r

100 %

Sample Test: Class XI

Total questions: 7

Worksheet time: 35mins

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