Question

Std: 11
Sub: Physics
Marks: 80
Date:26/02/202
[10]
[A] Choose correct answer from the given alternatives and write it. [Each carries 1 Mark)
1. The dimensional formula of Stefan Boltzmann's constant is .......
(A) M'L-T-3K4
(B) MPL2T-1K4
(C) M'L2T-2K-4
DI M'LºT-3K-4
2. A body moving with constant acceleration covers a distance 16 m in 4 seconds and 9m in 3
seconds. Its acceleration is ........
(A) 1 ms-2
(B) 2 ms-2
(C) 3 ms-2
3. If A = 2i + 3] + 8k is perpendicular to B = 4i - 4j + ak then value of a is .........
(A);
(C) 1
(D) -1
OV
(D) 4 ms-2 C
4. When force (3, 2, 1) Newton acts on a body, displacement of the body in the direction of
Y-axis is 5 meter. Work done is ......
(A) 15 Joule
(B) 10 Joule
(C) 5 Joule
(D) None of these
5. One solid sphere A and another hollow sphere B are of same mass and same outer radii.
Their moment of inertia about their diameters are respectively Ig and lg such that .........
(A) IA = 1g (B) In > Ig (C) IA <Is
D A
6. The gravitational force between two stones each of mass 1 kg placed at a distance of Im in
vaccum is .....
(A) zero
(B) 6.675 x 10-5 N (C) 6.675 x 10-11 N (D) 6.675 x 10- N
7. For satellite rotating in an orbit around the earth the ratio of kinetic energy to potential
energy is ...​

Answer 1

Answer:c

Explanation:

C