Which of the following are produced after a nuclear fusion process?
i. one heavy nucleus.
ii. neutrons-1.
iii. protons.
iv. Energy.
i and ii
i and iv
ii and iii
ii and iv
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements correctly describe(s) cathode rays?
i. they consist of tiny particles carrying negative electric charges.
ii. they are deflected in a magnetic field but not in an electric field.
iii. they consist of fast moving neutrons and deflected in an electric field.
i only
ii only
i and ii only
ii and iii only
Correct answer is A
No explanation has been provided for this answer.
39.0Ω
122.5Ω
245.0Ω
39000.0Ω
Correct answer is C
XL = 2πFL
= 2 x 3.142 x 30 x 10-3 x 1.3 x 103
= 245Ω
The primary aim in high tension transmission is to
minimize electrical energy losses due to heat production
increase the rate of energy transfer by using high voltage
increase the current in the wire
generate electricity at high current and low voltage
Correct answer is A
No explanation has been provided for this answer.