11.A simple LR circuit is connected to a battery at t = 0. The time instant...

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11.A simple LR circuit is connected to a battery at t = 0. The time instant at which rate of energy storage in inductor is half of power delivered by battery 2L (1) In 2 (3) In 2 (2) In (4) (4) In 3 12.A rod of length I slides against the perpendicular wall, such that the lowest point (A) of the rod slides with a speed v on horizontal surface as shown in figure. There exist a uniform magnetic field throughout the region. Now, what is the distance of point 'P' on the rod from end 'A' such that, the induced emf across 'P' and 'A' is maximum? (1) 31 (3) + x x x x x x x x x x x x x x x x x x x x x x B xxx x x x x x x x x xxxx xx xx xx 30 x x x x x x x X X X X xxxxx xx x x x x x x x x x x shiksha 2V% R 13.A solid circular disc (m, R) translates with Vo and rotates with = att = 0. Because of friction, pure rolling starts at t = to. The coefficient of friction is /4. Find to V 0 = 2V% R V @= R (1) Vo 3g 2% (3) 3g (2) 4V 3-g (4) Vo H.g 14.An equi-concave lens of radius of curvature 15 cm and = 1.5 is placed in water (u=1.33). If one surface is silvered, then image distance from lens when an object is placed at distance of 14 cm from the lens is Object water (1) 8.5 cm (3) 10.5 cm shiks (2) 4.2 cm (4) 6.4 cm 11.A simple LR circuit is connected to a battery at t = 0. The time instant at which rate of energy storage in inductor is half of power delivered by battery 2L (1) In 2 (3) In 2 (2) In (4) (4) In 3 12.A rod of length I slides against the perpendicular wall, such that the lowest point (A) of the rod slides with a speed v on horizontal surface as shown in figure. There exist a uniform magnetic field throughout the region. Now, what is the distance of point 'P' on the rod from end 'A' such that, the induced emf across 'P' and 'A' is maximum? (1) 31 (3) + x x x x x x x x x x x x x x x x x x x x x x B xxx x x x x x x x x xxxx xx xx xx 30 x x x x x x x X X X X xxxxx xx x x x x x x x x x x shiksha 2V% R 13.A solid circular disc (m, R) translates with Vo and rotates with = att = 0. Because of friction, pure rolling starts at t = to. The coefficient of friction is /4. Find to V 0 = 2V% R V @= R (1) Vo 3g 2% (3) 3g (2) 4V 3-g (4) Vo H.g 14.An equi-concave lens of radius of curvature 15 cm and = 1.5 is placed in water (u=1.33). If one surface is silvered, then image distance from lens when an object is placed at distance of 14 cm from the lens is Object water (1) 8.5 cm (3) 10.5 cm shiks (2) 4.2 cm (4) 6.4 cm