B.Tech (4 years)/B.Tech & M.Tech- Dual Degree/B.Tech & MBA- Dual Degree

PHYSICS 1.

The dimensions of entropy are (A) M0L-1T0K

2.

4.

(C) MLT-2K

(D) ML2T-2K-1

In a vernier calipers, p divisions of its main scale match with (p+1) divisions on its vernier scale. Each division of the main scale is k units. Using the vernier principle, its least count will be (A) k
(1/p)

3.

(B) M0L-2T0K2

(B) (k+1)/p

(C) (p+1)/k

(D) k/(p+1)

r r r r r r r r The torque of a force F i
5 j
3k acting at a point r 7 i
j 3k is r r r (A) i
24 j 34k

r r r (B) 18 i 24 j
34k

r r r (C) 15 i
24 j 34k

r r r (D) 5i
2 j 34k

Two springs of force constants k1 and k2 are connected as shown in figure below. The time period of vertical oscillation of mass m is given by

k1

k2

m

(A) 2

m (k 1
k 2)

(B) 2

m(k 1
k 2) k 1k 2

(C) 2

m(k 1 k 2) k 1k 2

(D) 2

m (k 1 k 2)

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