A cauterizer, used to stop bleeding in surgery, puts out 1.76 mA at 15.5 kV. (a) What is its power output? w (b) What is the resistance of the path? Ω

Consider the arrangement shown in the figure below where R = 7.00 , l = 1.10 m, and B = 2.25 T. HINT R xx xxxx x xx x x x x xxxxxx xx xxxxxx x x xxx x xxxxxx xxxx xx (b) What power (in W) is delivered to the resistor? W tea B Fapp (a) Apply the motional emf equation in combination with Ohm's law. (b) Recall the expressions for the power delivered to a resistor. (c) Apply the expression for the magnetic force on a current-carrying wire. (d) Recall the expression P = Fv. Click the hint button again to remove this hint. (a) At what constant speed (in m/s) should the bar be moved to produce a current of 1.40 A in the resistor? m/s (c) What magnetic force (in N) is exerted on the moving bar? (Enter the magnitude.) N (d) What instantaneous power (in W) is delivered by the force Fapp on the moving bar? W

How much power is dissipated in the 5Ω resistance? a) 7.62 w b) 11.02 w                       c) 2.44 w           d) 9.14 w.       e) none of these.

A 40.0-W lightbulb is connected to a 110.0-V source. (a) What is the current through the bulb? A(b) What is the internal resistance of the bulb? Ω

In the figure R1 = 130 Q, R2 = R3 = 62.0 Q, R4 = 89.8 Q, and the ideal battery has emf ɛ = 6.00 V. (a) What is the equivalent resistance? What is i in (b) resistance 1, (c) resistance 2, (d) resistance 3, and (e) resistance 4? ww R4 (a) Number Units (b) Number i Units (c) Number i Units (d) Number i Units (e) Number i Units

(a) Find the voltage drop (in V) in an extension cord having a 0.0650 Ω resistance and through which 5.45 A is flowing.  V   (b) A cheaper cord utilizes thinner wire and has a resistance of 0.340 Ω. What is the voltage drop (in V) in it when 5.45 A flows?V   (c)Why is the voltage to whatever appliance is being used reduced by this amount? What is the effect on the appliance?

Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0-V batteries of a 808-kg electric car be able to supply to do the following? (a) accelerate from rest to 25.0 m/s in 1.00 min А (b) climb a 200-m high hill in 2.00 min at a constant 25.0 m/s speed while exerting 403 N of force to overcome air resistance and friction A