Physics Questions

What is the effective resistance (in Ω) of two resistors 21 Ω and 28 Ω connected in parallel?

It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?

Which of the following is a bad conductor of heat?

What is the heat released by a heating filament rated 20 W when it is kept on for 2 seconds?

Calculate the pressure (in Pa) if a thrust of 1000 N is applied to an area of 5 sq.m.

Which of the following statements is/are INCORRECT?

A. The value of G on the moon is equal to that on the earth.

B. 26.68 x 10-11 N is the force of gravitation between two point masses of 2 kg and 2kg kept 1 m apart.

C. Newton's law of gravitation is valid in the laboratory only.

D. Force is inversely proportional to the square of the distance between two bodies.

Which instrument is used to measure humidity?

What is measured with the Nephometer?