Answer to Question #61533 in Physics for na

Question

1 A convex mirror has a radius of 20 cm. An object is placed 30 cm in front of the mirror. Determine where the image will appear.

−4.5cm
−4.5cm

−5.5cm
−5.5cm

−6.5cm
−6.5cm

−7.5cm
−7.5cm
2 A wire of length L and cross-sectional area A has a resistivity ρ. Which of the following formulas can be used to calculate the resistance of the wire?
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ρ×LA
ρ×LA

ρ×AL
ρ×AL

Lρ×A
Lρ×A
No answer
3 The electric current as a function of voltage of a wire is presented by the attached graph.What is the resistance of the wire?
Click here to see exhibit

1Ω

1.02Ω

1.6Ω

0.8Ω

Answer 1

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