The S.I unit of moment of a force is?

5 years ago

A. kgm B. Nm C. Jm D. µm−1 Correct Answer: Option B - Nm Explanation Moment of a force is…

An element and its isotope only differ in the number of?

5 years ago

A. protons B. electrons C. ions D. neutrons Correct Answer: Option D - neutrons

The thermal expansion of a solid is an advantage in?

5 years ago

A. Balance wheel of a watch B. Construction of steel rail lines C. Construction of large steel bridges D. Fitting…

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

5 years ago

A. A compressor B. A refrigerator C. Air blower D. Air conditioner Correct Answer: Option D - Air conditioner Explanation…

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

5 years ago

A. 1ω B. 9ω C. 3ω D. 0.33ω Correct Answer: Option A - 1ω Explanation Resistor connected in a parallel…

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.

5 years ago

A. 80.0% B. 76.6% C. 66.7% D. 60.7% Correct Answer: Option C - 66.7% Explanation Efficiency = MA/V.R x 100…

Which of the following statements is NOT correct ________?

5 years ago

A. Molecules of a liquid are stationary B. Brownian motion is evidence of particle nature of matter C. Matter is…

A cell of internal resistance 2π supplies current to a 6π resistor. The efficiency of the cell is?

5 years ago

A. 12.0% B. 25.0% C. 33.3% D. 75.0% Correct Answer: Option C - 33.3% Explanation Internal resistance determines the maximum…