Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
The bond between silicon and germanium is
covalent
ionic
dative
electrovalent
Correct answer is A
No explanation has been provided for this answer.
Which of the following materials has an increase in resistance with temperature?
water
metals
wood
electrolyte
Correct answer is B
Resistance in metals are proportional to temperature
600 J
50 J
133 J
250 J
Correct answer is A
Inductance (L) in series: 4 + 8 = 12
Therefore Energy stored =
W = \(\frac{1}{2} LI^2\)
= \(\frac{1}{2} \times 12 \times 10^2\)
= 600J
Under which of the following conditions do gases conduct electricity?
Low presssure and low p.d
low pressure and high p.d
high pressure an low p.d
high pressure and high p.d
Correct answer is B
Under high potential difference and low pressure gases are good conductor of electricity
N28
N12
N16
N24
Correct answer is B
Energy consumed = power x time = lvt = 2 x 250 x 6hr = 300 wh = 3 kwh but 1 kwh = N4
3 kwh = 3 x N4 = N 12