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Question 29 (1 point) An electric power tool operates from a 12 V battery rated at...
An electromagnet creates a uniform magnetic field which penetrates a 39-turn 15 cm diameter coil placed within the uniform field. At what rate must the magnetic field created by the electromagnet change in order to induce an emf of 77 volts in the coil? Question options: 15 T/s none of these 39 T/s 1.1 x 10^2 T/s 77 T/s Question An electric power tool operates from a 12 V battery rated at 1.6x10^2 ampere-hours. How much energy does this battery...
Question 30 1 pts A battery is rated at 12 V and 160 A-h. How much energy can this battery convert over its lifetime? O 1.9 kJ 6.0 kJ O 6.9 MJ O 1.9 M)
1) A particular 12 V car battery can send a total charge of 84 A h (ampere-hours) through a circuit, from one terminal to the other. (a) How many coulombs of charge does this represent? (Hint: current = ) (b) If this entire charge undergoes a change in electric potential of 12 V, how much energy is involved?
A 5 V battery is rated at 1,709 mAh. What is the battery's lifetime (in hours) if the output current is kept constant at 64 mA? An electric car has electric motors that dissipate a maximum 19 kW of power. When the car's battery can store 44 kWh of energy, what is the shortest time (in minutes) that a fully-charged battery will completely discharge?
14 Question (1 point) A battery can provide a current of 3.60 A at 1.80 V for 7.00 hr. How much energy (in kJ) is produced? 1st attempt See Hint See Periodic Table kJ Energy =
Question 1: A nuclear power plant operates at 70 % of its maximum theoretical (Carnot) efficiency between temperatures of 660 ∘C and 340 ∘C. If the plant produces electric energy at the rate of 1.3 GW , how much exhaust heat is discharged per hour? Question 2: How long does it take the Sun to melt a block of ice at 0∘C with a flat horizontal area 1.0 m2 and thickness 2.0 cm ? Assume that the Sun's rays make...
1.A single light bulb is connected to a 12 V battery. The light bulb uses 55 W of power (which is about what a car’s headlight uses). (a) What is the current flowing out of the high-voltage (+) end of the battery? (b) What is the current flowing into the low-voltage (-) end of the battery? (c) The battery has a sticker on it that says “This 12V battery contains 50 Amp-hours.” This indicates Amps × hours that the battery...
4. (to be graded) You've been hired by Elon Musk for a secret project within Tesla. Rather than annoying battery technology with its slow charging and limited lifetime, he wants to try to power cars by storing the energy in capacitors a) If a small car with an efficient electric motor consumes about 10kW of power on average, and we'd like to be able to drive for several hours before recharging, about how much energy, in J, do we need...
Question 3 1 pts The electric potential at point Pis +100 V. Which of the following can we determine about the electric field at P? O None of the above Its magnitude, but not direction Its direction, but not magnitude Its magnitude and direction Its magnitude, direction, and energy Only that it is not zero
A 12 v battery causes a current of 0.5 A through a resistor. a) what is the resistance of the resistor? b) What is the power output of the battery? c) How many joules of energy does the battery lose in a minute? Answer each multiple choice question (part a) and then (part b) explain in words why your answer is correct The length of a wire is doubled and the radius is doubled. By what factor does the resistance...