1 Group B
Attempt any Three questions.
4x3=12
8. Derive expression for energy stored in a stretched wire.
2. Derive mirror formula - +
f
10. Use triangle law of vector addition to find magnitude and direction of
resultant of two vectors.
11. How can a body be charged positively by method of induction.
и
v
Group C
Attempt any Two numerical
4x2=8
12. Change 36 km/hr into m/s by method of dimension.
13. A wire 2m long and cross sectional area 10-6 m² is stretched 1mm by force
50N. Calculate
i) Strain
ii) Young's modulus iii) energy stored.
14. Two vectors each of magnitude 5 are inclined at 60°. Find magnitude and
direction of resultant.​