Answer:
<em>a. all three resistors in parallel</em>
Explanation:
<u>Combination of Resistors</u>
The power supplied by a power source or V volts is:
where R is the equivalent resistance of the whole circuit connected to the power source.
As shown, the power is inversely proportional to R which means that if R is a minimum, P is a maximum.
The problem reduces now to find the combination of resistors that produces the least value of its equivalent. If three resistors are connected in series, the equivalent is the sum of all them
This equation gives R a value that is greater than the greatest of all three resistances.
If they are connected in parallel, the equivalent is given by
This equation produces for R a value that is smaller than the smallest value from the three resistances.
Any other combination of resistors will produce intermediate values between the maximum (series) and the minimum (parallel), thus:
a. all three resistors in parallel
Look at yourself in a plane mirror<span> and </span>you see<span> your </span>image<span> - it is upright. The </span>image <span>is located on the other side of the </span>mirror<span> since reflected rays diverge upon reflection; when </span>mirrors<span> produce </span>images<span> on the the opposite side of the </span>mirror, the images<span> are said to be virtual.</span>
Answer:
If the particle is an electron
If the particle is a proton,
Explanation:
Initial speed at the origin,
to +ve x-axis
The particle crosses the x-axis at , x = 1.5 cm = 0.015 m
The particle can either be an electron or a proton:
Mass of an electron,
Mass of a proton,
The electric field intensity along the positive y axis , can be given by the formula:
If the particle is an electron:
If the particle is a proton:
Answer:
Electric current is directly proportional to potential energy and inversely proportional to resistance.
Explanation:
The relationship between the number of visible spectral lines are identical for atoms .However they have unique wavelengths.
Option B
<u>
Explanation:</u>
A spectrum is a range of frequencies or a range of wavelengths. The photon energy of the emitted photon is equal to the difference between two states. For every atom there are quite many electron transitions and each has a energy difference.
This difference in wavelength causes spectrum .As each element emission spectrum is unique because each atom has different energy and causes uniqueness in the emission spectrum . Hence, due to the difference in energy it emits different wavelengths.