#1. Three cells each of e.m.f 2 V are connected in parallel. What is the effective e.m.f of the arrangement?
#2. Which one of the following statements is correct about diffusion?
#3. S is a mode of heat transfer in glass but not vacuum and T is a mode of heat transfer in vacuum identify S and T,
#4. A body starts from rest and accelerated uniformly at a rate of 8 ms2. Find the time it takes to cover a distance of 100 m.
#5. When no external forces act on two bodies in a collision, the total momentum of the bodies
#6. A heating element of resistance 40 C2 produces 360 kJ of heat in 5mins. Find the current flowing through the element.
#7. An atom becomes positively charged when it loses an electron because ....
#8. The deflection of cathode rays by an electric field is due to the
#9. Two objects F and Q are placed along a straight line in front of a plane minor. If Q is 1m from the mirror and the image of P is 4 m from Q, find the distance P from the mirror.
#10. Which one of the following electromagnetic waves has the highest penetrating power?
#11. Which one of the following optical devices can be used as a solar concentrator?
#12. In an electrical appliance, a fuse is connected to the live wire in order to
#13. The force which holds the molecules of water together is called
#14. When no external forces act on two bodies in a collision, the total momentum of the bodies
#15. A trolley of mass 1.5 kg moves with an acceleration of 2 ms-2 when pulled by an elastic cord. 1f the tension in the cord is 5 N, find the frictional force