How much current is drawn by a television with a resistance of 30.0 that is connected across a potential difference of 120 V? A
How much current is drawn by a television with a resistance of 30.0 that is connected...
A light bulb is connected to an electrical outlet. a. How much current (amps) is drawn by a 80W light bulb plugged into an electric outlet (electric potential = 120v)? b. What is the resistance of the light bulb?
Two resistors having different resistances are connected in parallel. The equivalent resistance is always Select one: O a. equal to the larger resistance. O b. equal to the smaller resistance. O c. smaller than the smaller resistance. d. between the two resistances. O e. larger than the larger resistance. A battery with potential difference 17.9 V is across two resistors that are in series. The potential difference across one of the resistors is 5.7 V. The potential difference across the...
Your toaster has a power cord with a resistance of 1.9×10−2 Ω connected in series with a 9.7 Ω nichrome heating element. The potential difference between the terminals of the toaster is 120 V. How much power is dissipated in the power cord? (W) How much power is dissipated in the heating element? (kW)
Suppose you have a DC power supply connected in series with two identical resistors by low-resistance connecting wires. You set the power supply to a potential difference of 6.0 V. Which of the following statements, if any, hold true? The same potential difference will appear across each resistor. The same amount of current will flow through each resistor. The same amount of current will flow through the power supply as flows through each resistor. The potential difference across each resistor...
A nichrome wire with a resistance of 9.0 is connected across the terminals of a 3.0 V flashlight battery. How much current is in the wire? A
The power rating of a light bulb (such as a 100-W bulb) is the power it dissipates when connected across a 120-V potential difference (a) What is the resistance of a 100-W bulb? (b) What is the resistance of a 120-W bulb? (c) How much current does each bulb draw in normal use? 1100-w = 1120-w-
Your toaster has a power cord with a resistance of 2.2times10^-2 ohm connected in series with a 9.9 ohm nichrome heating element. The potential difference between the terminals of the toaster is 120 V. How much power is dissipated in the power cord? Express your answer using two significant figures. How much power is dissipated in the heating element? Express your answer using two significant figures.
1)A battery having an e.m.f. of 105 V and an internal resistance of 1 Ω is connected in parallel with a d.c. generator of e.m.f. 110 V and internal resistance of 0.5 Ω to supply a load having a resistance of 8 Ω. Calculate: (a) the currents in the battery, the generator and the load; (b) the potential difference across the load. 1)b.Two batteries are connected in parallel. The e.m.f. and internal resistance of one battery are 120 V and...
A coil with a self-inductance of 4 H and a resistance of 14 ohm is connected across a 22 V battery of negligible internal resistance. What is the final current? A How much energy is stored in the inductor when the final current is attained? J
Exercise 2. An instrument used to measure current is called an ammeter. The ammeter is connected into a circuit in series in the loop in which the desired current reading is required. The resistance of an ideal ammeter is zero, and it is essential in real ammeters that the resistance of the instrument be very small compared to other resistances in the circuit. Why? R2 Ri a)-A meter to measure potential difference is called a voltmeter. To find the potential...