physics

The diagram below is a micrometer screw gauge. Determine its reading.

A. 2.44mm B. 2.46mm C. 2.86mm D. 2.96mm Correct Answer: Option B B. 2.46mm

6 years ago

A nuclide is represented by 70/32B. Determine its neutron-proton ratio?

A. 0.5 B. 0.8 C. 1.2 D. 1.5 Correct Answer: Option C C. 1.2 Explanation The element B has a…

6 years ago

In which of the following fields is radioisotopes not used?

A. Medicine B. Oil industry C. Agriculture D. Weather forecast Correct Answer: Option D D. Weather forecast

6 years ago

Which of the following radiations has the longest wavelength?

A. Gamma ray B. Radio wave C. Infrared ray D. X-ray Correct Answer: Option B B. Radio wave Explanation Radio…

6 years ago

In which of the following situations is photoelectric effect employed?

I. Automatic devices for switching on light at dusk II. Automatic doors in departmental stores III. Automatic devices for switching…

6 years ago

Which of the following is emitted in a process of natural radioactivity?

A. α- particles and β- particles B. α- particles and X-rays C. β- particles and X-rays D. λ- rays and…

6 years ago

A student uses two compass needles to investigate the magnetic field around a bar magnet. Which of the following diagrams show the correct directions of the needles?

A. A B. B C. C D. D Correct Answer: Option B Explanation By convention, the field direction is taken…

6 years ago

In a series R-L-C circuit, R = 10Ω, Xc= 4Ω and XL = 9Ω. The impedance of the circuit is?

A. 4.1Ω B. 5.0Ω C. 10.8Ω D. 11.2Ω Correct Answer: Option D Explanation The impedance for a RLC circuit is…

6 years ago

In which of the following activities is an induction coil not useful?

A. Investigation of high voltages B. Study of electric discharge C. Operation of X-ray tubes D. A.C. power transmission Correct…

6 years ago

Which of the following statements about magnetic lines of force is not correct? They

A. pass-through even non-magnetic materials B. run from the north pole to the south pole C. are in a state…

6 years ago