physics

A conductor has a diameter of 1.00 mm and length 2.00m. if the resistance of the material is 0.1Ω, its resistivity is?

A. 2.55 x 105 Ωm B. 2.55 x 102 Ωm C. 3.93 x 10-6 Ωm D. 3.93 x 10-8 Ωm…

4 years ago

If two charged plates are maintained at a potential difference of 3 kv; the work done in taking a charge of 600 µC across the field is?

A. 0.8 J B. 1.8 J C. 9.0 J D. 18.0 J Correct Answer: Option B = 0.8 J Explanation…

4 years ago

The wavelength of the first overtone of a note in a closed pipe of length 33 cm is?

A. 33 cm B. 44 cm C. 22 cm D. 17 cm Correct Answer: Option B = 44 cm Explanation…

4 years ago

Non-luminous object can be seen because they?

A. reflect light B. are near C. are polished D. emit light Correct Answer: Option A = reflect light

4 years ago

An object placed 10cm from a concave mirror of focal length 5cm would have its image?

A. at the centre of curvature B. at the radius of curvature C. at infinity D. 10 cm from the…

4 years ago

A p-n junction diode is used as?

A. a rectifier in a d.c circuit B. an amplifier in d.c circuit C. an anplifier in an a.c circuit…

4 years ago

A certain manufacturer wishes to make an n-type semiconductor. Which materials would he select for doping?

A. boron and antimony B. boron and antimony C. aluminium and indium D. arsenic and antimony Correct Answer: Option D…

4 years ago

which of the statement below are correct about nuclear fission?

I. The number of neutrons released exceeds the number that caused the fission. II. There is loss of mass. III.…

4 years ago