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1.5 kg of liquid having a constant specific heat of 2.5 kJ/kg K is stirred in a well-insulated chamber causing the
temperature to rise by 15°C. Find ΔE and W for the process
A potential difference of 250V is applied to a field winding at 15°C and the current is 5A. What will the temperature of the winding when current has fallen to 3.91A, applied voltage being constant. Assume delta15=0.00393/°C
A platinum coil has a resistance of 3.146ohms at 40°C and 3.767 ohms at 100°C. Find the resistance at 0°C and the temperature coefficient of resistance at 40°C
Two parallel straight wires 10.0 cm apart carry currents in opposite directions (Fig. 20–24). Current I_1=5.0 A is out of the page, and I_2=7.0 A is into the page. Determine the magnitude and direction of the magnetic field halfway between the two wires.
Two capacitors with 2.0 F and 3.0 F capacitance, respectively, are connected in series and subjected to a total potential difference of 100 V.
Find the
(a) total capacitance,
(b) charge stored in each capacitor, and
(c) potential difference across each capacitor.
You have five 10.0 F capacitors. Show all possible connections of all five capacitors to produce an equivalent capacitance of .5 F
Amultimodestep-indexfiberhascoreand cladding refractive indices of 1,475 and 1.458 respectively. If it has a core radius of 30 μm and operates at a wavelength of 1250 nm.
– What should be the core radius of the fiber if it is to operate as a single mode fiber
Does radiation form ions by removing protons from the matter it passes?
A wheel rotates with a constant angular acceleration of 3.5 rad/s2. If the angular speed of the wheel is 2 rad/s at t = 0, Find what angle does the wheel rotate between t = 0 and t = 2 s ?
What is the maximum force on an aluminium particle with a +0.1 𝜇𝐶 of charge, which is passing between the poles of a 1.5 𝑇 permanent magnet at a speed of 5 𝑚𝑠−1? In what direction is the force?
Hint: Assume the direction of the magnetic field as preferred. Draw a diagram showing all the relevant vectors in terms of their components. Use the equation for the force on a moving charged particle in a magnetic field.
