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.
82.50 cm
68.18cm
15.90cm
11.95cm
Correct answer is B
L = \(\frac{R.A}{e} = \frac{4 \times 7.50 \times 106{-4}}{4.40 \times 10^{-5}} = 68.18cm\)
2.0\(\Omega\).
3.0\(\Omega\).
5.0\(\Omega\).
6.0\(\Omega\).
Correct answer is A
\(\frac{V}{R} = \frac{E}{R + r}\)
\(\frac{0.9}{3} = \frac{1.5}{3 + r}\)
r = 2\(\Omega\).
effective resistance of the circuit is halved
total power dissipated is doubled
total current in the circuit is halved
terminal voltage is halved
Correct answer is B
No explanation has been provided for this answer.
\(\frac{Q}{4 \pi E_o E_r}\)
\(\frac{Q}{4 \pi E_o E_r (R +r)}\)
\(\frac{Q}{4 \pi E_o E_r(R - r)}\)
\(\frac{Q}{4 \pi E_o E_rR}\)
Correct answer is D
No explanation has been provided for this answer.
electric charges evaporate from the surface of the conductor
charges are connected to earth
charges on the conductor are neutralized by opposite charges from the surrounding air
charges ionize the surrounding air
Correct answer is C
No explanation has been provided for this answer.