26. A unit of ………………… is an Ohm.
a. voltage b. current
c. electric power d. resistance
27. I have many spanners. Each one …………… handy and strong.
a. be b. is
c. am d. are
28. All of students in our class ………. very intelligent.
a. be b. is
c. am d. are
29. The device in a car or a clock that contains and supplies electricity is a ………….. .
a. transformer b. station
c. breaker d. battery