Answer:
Option 5:
The 60W bulb has a greater resistance and a lower current than the 100 W bulb.
Explanation:
We have to compare the resistance and current of both bulbs.
Bulb A
Power = 60 W
Voltage = 110 V
Power is given as:
![P = V^2 /R](https://tex.z-dn.net/?f=P%20%3D%20V%5E2%20%2FR)
where V= voltage and R = resistance
![=> 60 = 110^2 / R\\\\R = 201.6 \Omega](https://tex.z-dn.net/?f=%3D%3E%2060%20%3D%20110%5E2%20%2F%20R%5C%5C%5C%5CR%20%3D%20201.6%20%5COmega)
Power is also given as:
P = IV
where I = current
=> 60 = I * 110
I = 60/110 = 0.54 A
Bulb B
Power = 100 W
Voltage = 110 V
To get resistance:
![100 = 110^2 / R\\\\R = 121 \Omega](https://tex.z-dn.net/?f=100%20%3D%20110%5E2%20%2F%20R%5C%5C%5C%5CR%20%3D%20121%20%5COmega)
To get current:
100 = I * 110
I = 100 / 110
I = 0.91 A
Therefore, by comparison, the 60W bulb has a greater resistance and a lower current.
I think its true. hope this helps.
Answer:
Being a plane mirror the Image is formed 3 metres beyond the mirror . So total distance is 3+3 = 6metres
a metal spike in an airport runway
Answer:
Thermal conduction is the transfer of internal energy by microscopic collisions of particles and movement of electrons within a body. The colliding particles, which include molecules, atoms and electrons, transfer disorganized microscopic kinetic and potential energy, when joined known as internal energy.
Explanation:
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