Answer:
(D )
and 
Explanation:
Given that, the rms value of current is 10 ampere and its frequency is 50 Hz.
Now maximum value of current can be calculated as,

The time period is defined as,

Now the time taken by alternating current going from zero to maximum value is,

Therefore, the time taken by alternating current to reach maximum value is
and the peak value of current is
.
When the switch is open then no current can flow, on the other hand, when it is closed, current will pass through. When only “bulb a” is connected to the battery then more current is flowing to “bulb a” causing it to be bright. So the light of “bulb a” will be dimmer.
Answer:
The distance from harvest mouse to the leaf is 4.74 m.
Explanation:
Given that,
Intensity = -10 dB
Distance = 1.5 m
We need to calculate the power of intensity
Using formula of power of intensity


Put the value into the formula


We need to calculate the minimum intensity level
Using formula of minimum intensity





We need to calculate the area
Using formula of intensity


Put the value into the formula


We need to calculate the distance
Using formula of area

Put the value into the formula




Hence, The distance from harvest mouse to the leaf is 4.74 m.
Answer:
26
Explanation:
meters per second has a wavelength of 26.