Expert solve q no 10 9. An electron having kinetic T is moG•ng in a circular orbit of radius pe
uniform magnetic induction B. If kinetic enerw is doubled and magnetic induction
radius will become:
2
10. Charge q of mass m is placed in a uniform electric field E, then KE after time t:
11. magnitude of Iin ampere is:
60 Q
so
(A) 0.1
IA
(B) 0.3
ton
(C) 0.6
12. In the method using the that a-he ratio Of the number turns
primary to that in the secondary the*tep-up transformer is 1 : 10. If Powel
has to be supplied at 200 V abe ratio-Of the number of turns in the primary
