Examlex
A resistor has a resistance of 30 Ω at 20°C. If the temperature coefficient of resistivity is 4.5 × 10−3 °C−1, what is its resistance at 200°C?
Q1: Three point charges are positioned as follows:
Q16: A long straight wire is carrying a
Q35: If a charged particle is moving through
Q39: A simple magnifier of refractive power 15.0
Q44: Electromagnetic wavelengths of a few centimeters are
Q46: What kind of lenses are used in
Q52: In a three-pronged plug, the purpose of
Q56: An electromagnetic wave with a wavelength about
Q61: A series LR circuit dissipates an average
Q72: Three resistors, R<sub>1</sub> = 9.0 Ω, R<sub>2</sub>