Physics Past Questions and Answers

Which of the following statements is NOT correct?

A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine

Three 3ω resistance are connected in parallel what is the equivalent resistance?

Which of the following instruments helps to maintain the correct humidity and temperature of a building?

An element and its isotope only differ in the number of