Calculate the energy of the third level of an atom if the ground state energy is - 24.8eV
-9.20eV
-8.20eV
-2.75eV
-1.75eV
Correct answer is C
\(E_3 = \frac{E}{n^2}\)
\(E_3 = \frac{-24.8}{3^2}\)
\(E_3 = 2.75eV\)
2.4g
3.2g
4.6g
4.8g
Correct answer is C
First let's find z
z = \(\frac{M}{It}\)
z = \(\frac{1.8}{2.5 \times (3 \times 60 \times 60)}\)
Therefore, the new M equals
M = zIt
M = \(\frac{1.8 \times 4 \times 4.8 \times 60 \times 60}{2.5 \times 3 \times 60 \times 60}\)
M = 4.6g
Induced emfs are best explained using
Ohm's law
Faraday's law
Colomb's law
Lenz's law
Correct answer is B
No explanation has been provided for this answer.
To convert a galvanometer to a voltmeter, a
high resistance is connected to it in series
high resistance is connected to it in parallel
low resistance is connected to it in parallel
low resistance is connected to it in series
Correct answer is A
No explanation has been provided for this answer.
When a charge moves through an electric circuit in the direction of an electric force, it
gains both potential and kinetic energy
gains potential energy and lose kinetic energy
loses potential energy and gains kinetic energy
loses both potential and kinetic energy
Correct answer is C
No explanation has been provided for this answer.