physics

The phenomenon of radioactivity was first discovered by?

A. Marie Curve B. Sir J.J Thomson C. Henn Becquerel D. Niels Bohr E. Enrico Fermi Correct Answer: Option C…

5 years ago

Electric motor primarily converts?

A. electrical energy into chemical energy B. electrical energy into heat energy C. kinetic energy into potential energy D. electrical…

5 years ago

Which of the following is not a conductor of electricity?

A. Human body B. Glass C. Silver D. Earth E. Copper Correct Answer: Option B - Glass

5 years ago

Electrical resistance is the property of an electrical conductor that causes electrical energy to be converted into?

A. mechanical energy B. solar energy C. heat energy D. magnetic energy E. chemical energy. Correct Answer: Option C -…

5 years ago

The function of the magnanese (IV) oxide in a leclanche cell is to?

A. decrease the e.m.f. of the cell B. prevent local action in the cell C. prevent polarization in the cell…

5 years ago

Which of the following have the greatest penetrating power?

A. Beta rays B. Alpha rays C. Gamma rays D. Electrons E. Neutrons Correct Answer: Option C - Gamma rays

5 years ago

In a series R – C circuit, the resistance of the resistor is 4 Ω and capacitive reactance is 3 Ω. Calculate the impedance of the circuit

A. 1Ω B. 4Ω C. 5Ω D. 7Ω E. 12Ω Correct Answer: Option C = 5Ω Explanation Z = √R²…

5 years ago

What is the gravitational potential due to a point mass m at a distance from it? (G = gravitational constant)

A. -Gm²/r² B. -Gm²/r C. –Gm/Gr² D. –Gm/r E. –Gm/2 Correct Answer: Option D = –Gm/r

5 years ago