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- In electrical theory, Ohm’s law states that I = V/R , where I is the current in amperes, V is the electromotive force in volts, and R is the resistance in ohms. In a certain circuit V = 110 and R = 50 . If V and R are to be changed by the same numerical amount, what change in them will cause I to double?Give me additional examples of values with infinite significant figures. According to our handouts, here is one of the examples: 3000 chocolate Bars which are considered countable numbers. Moreover, the final zeroes in a whole number are significant IF the unit of quantity is measurable like mass, temperature, length, current etc. Therefore, even the trailing numbers are counted as significant. Example: 40 kg (2 sig figs) & 1900 mm (4 sig figs). Give me more examples as well. Thank you!answer 20 and 21 Which formula must be used for this problem?
- An electric water heater is designed to produce 48 kWkW of heat when it is connected to a 240-V source. If the heater is 88 %% efficient, how long would it take to heat 51 galgal of water from 20∘C∘C to 60 ∘∘? Express your answer using two significant figures.A 6-ohm resistor is a material that has a resistivity of .5 units. If the cross-sectional area of that resistor is .2m ~ 2, what is the length g that resistor?A battery has an emf of 3V and an internal resistance of 2 ohms. If a wire with resistance R is connected to this battery and 133mA of current flows through it, what is the numerical value of R?
- The electrical power, P (in watts), transformed by an electrical appliance is given by P = f(i) = 9i2 , where i is the electrical current flowing through the appliance, in amps. Find f(10) and f'(10), and interpret them in the context of this problem.If 25 A current flows through a circuit at a voltage difference of 1.3 x 102 V, how much is the power consumption? How many 50-Watt bulbs can be operated with this voltage source? If the charge for consumption rate from Edison is 25 c/ kilowatt-hour, what is the charge for 8 hours? How much is going to be the monthly bill only for these bulbs?Compute the value of voltage drop V1.
- A car battery is rated at 600 AH (i.e., amps x hours). Calculate the number of coulombs this is equivalent to.The voltage across a membrane forming a cell wall is 84 mV and the membrane is 7.5 nm thick. What is the electric field strength in the cell wall, in volts per meter?What minimum diameter is required for the wire? Express your answer to two significant figures and include the appropriate units.