Three resistors, 25, 45, and 75 Ω, are connected in series, and a 0.51-A current passes through them. What are (a) the equivalent resistance and (b) the potential difference across the three resistors?

In the circuit above, Vs=24V, ?1=60kΩ, ?2=20kΩ, ?3=90kΩ, ?4=85kΩ. Find the voltage drop ?4 across the 85kΩresistor. Group of answer choices 4.7 V 8.7 V 5.1 V 6.3 V 2.7 V

An engineer fashions an 3.9-k equivalent resistor from a parallel combination of 4 equal- value resistors. What is the resistance (in kQ) of each individual resistor?

For a 6.8 µF capacitor which voltage across it as shown below, what is the current flowing into the capacitor: Voltage vs Time for a Capacitor 30 25 20 10 10 15 20 25 Time (msec) Voltage (V)

Power Rating of a Resistor. The power rating of a resistor is the maximum power the resistor can safely dissipate without too great a rise in temperature and hence damage to the resistor. (a) If the power rating of a 15 k 2 resistor is 5.0 W, what is the maximum allowable potential difference across the terminals of the resistor? (b) A 9.0 k resistor is to be connected across a 120 V potential difference. What power rating is required? (c) A 100.0 and a 150.0 resistor, both rated at 2.00 W, are connected in series across a variable potential difference. What is the greatest this potential difference can be without overheating either resistor, and what is the rate of heat generated in each resistor under these conditions?

A small light-bulb draws 0.22-A current from a 6-V battery. In 2 min: a)  How much energy does the battery supply? b)  How many electrons passes through a point in the circut every second?

An initially uncharged parallel plate capacitor is connected to a circuit containing a battery with emf 8-42V and a resistor, R = 4.9MQ as shown in the figure to below. The capacitor whose plates have an area of A = 7.1mm² are separated by a distance of d = 5mm and one third of the capacitor is filled with a dielectric material, K₁ = 3.5 and the rest (two thirds) is filled with another dielectric material, K₂ = 3.4. At t=0 the switch is closed. 5.4 seconds after the switch is closed the electric field within the first dielectric material (K₁) is observed to be 18 × 106 N/C. Find the charge on the capacitor at this instant (t = 5.4s) in terms of permitivity of free space €0? Express your answer using zero decimal place. R E Answer: S K1 K2