A 31 cm tall object is placed in front of a concave mirror with a radius of 34 cm. The distance of the object to the mirror is 9
1 answer:
Focal length is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where parallel rays of light meet, or converge. From the optics the focal length of the mirror can be defined as the radius of the mirror divided between two, or in other words, half the radius of the mirror.
Therefore the focal length of the mirror is 17cm
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The electric power (P) produced by an electric current (I) passing through a voltage (V) is given by the equation:
If the battery charger works with a voltage of 12V, replace V = 12V into the equation, as well as the corresponding values for the electric current to find the power produced in each case.
A) I = 10A
Replace V=12V and I=10A to find the power produced in the fast charge mode:
B) Replace V=12V and I=2A to find the power produced in the trickle charge mode:
Therefore, the power produced by a 12V battery charger is equal to 120 Watts when it delivers 10A in fast charge mode, and 24 Watts when it delivers 2A in trickle charge mode.