18. A flashlight has 4 – AA batteries. The combination has a capacity of 200 watt-sec. How long in mins will it take to discharge if the flashlight consumes 10 mA at 6 V? A. 55.6 min B. 65.6 min C. 45.6 min D. 75.6 min 19. Two equal resistors when connected in series across a supply draws a total power of 20 watts. What is the total power drawn when the two resistors are connected in parallel across the same supply? A. 20 W B. 40 W C. 60 W D. 80 W

18. A flashlight has 4 – AA batteries. The combination has a capacity of 200 watt-sec. How long in mins will it take to discharge if the flashlight consumes 10 mA at 6 V? A. 55.6 min B. 65.6 min C. 45.6 min D. 75.6 min 19. Two equal resistors when connected in series across a supply draws a total power of 20 watts. What is the total power drawn when the two resistors are connected in parallel across the same supply? A. 20 W B. 40 W C. 60 W D. 80 W

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter12: Batteries And Other Sources Of Electricity

Section: Chapter Questions

Problem 14RQ: 14. A 6-V lead-acid battery has an A-hr rating of 180 A-hr. The battery is to be load-tested. What...

See similar textbooks

Similar questions

ANSWER QUICKLY
How can I make a regulated power supply with 1N4750A zener diode and 2N3904 transistor using this values in multisim? RD= 1.235 mOhms R1= 1.65 mOhms R2= 1.235 mOhms R3= 944.1896 A
A voltage-multiplier has a Vm = 60 V peak sinusoidal secondary voltage. During the positive half-cycle, D1 conducts and D2 is cut-off, charging C1 up to what voltage level? C1 HE (A) OV B) 60 V V Ⓒ120 V (D) 180 V Vp 1:1 Vm = 60 V D1 D2 не C2 Ideal diodes C3 HE D3 D4 C4 :
Solev this question it has 4 parts confusing me alot and X=167 and in part c there's a bit tricky with X by providing a condition so please check
1. The no-load terminal voltage of a battery is 30 V. The terminal voltage drops to 22 V when supplying a current of 5 A. Determine the emf and the internal resistance of this battery. 2. Two identical zinc carbon batteries are available. When connected in series, they supply 0.5 A to a 4 ohm resistor. When connected in parallel, they supply 0.4 A to a 5 ohm resistor. Determine the emf and internal resistance of each battery. 3. When supplying a current of 5 A, the terminal voltage of a battery is 15 V. The battery is then recharged at a rate of 3 A and the terminal voltage is found to be 21 V. Determine the emf and the internal resistance of the battery. 4. A battery with an emf of 12 V and an internal resistance of 0.8 ohm is to be recharged through a 20 V source. (a) show by means of a diagram the connection of the circuit elements. (b) What is the current in the circuit? (c) The recharging current is to be limited to 3 A. What is the value of the limiting…
If 2μA of current flows through a component for 5ms, what will be the charge in that component? Major Topic 1 Basics of atomic structure & electri
answer i) only..no hand written
20. The resistance R and a 2 μF capacitor are connected in series across 200-V dc supply. Across the capacitor is a neon lamp that strikes at 120 volts. Calculate the value of R to make the lamp strikes 5 seconds after the switch has been closed. A. 4.89 kΩ B. 4.89 MΩ C. 2.73 MΩ D. 2.94 MΩ
Determine the DC currents (IB, Ic and lĘ) and dc junction voltages (VBE, VCE and VCB) Ig=Blank 1 mA, Ic=Blank 2 mA, IĘ=Blank 3 mA, VBE= Blank 4 V, VCE = Blank 5 V and VCB = Blank 6 V Use 2 decimal places. Use the following values: VBB = 2V RB = 7 kQ Rc = 248 Q Vcc = 19 V BDc = 56 Blank 1 Add your answer Blank 2 Add your answer Blank 3 Add your answer Blank 4 Add your answer Blank 5 Add your answer Blank 6 Add your answer
A practical switch is operating at a switching frequency of 100 kHz and a 0.5 duty cycle. The switch is initially on (the first half cycle). The switch has the following parameters: Von = 0.1 V Volt 80 V Ion - 100 A 10.1 A ton = 0 Loft O Ldelay O a) Draw clear voltage and current waveforms for one switching cycle with all values shown (times, voltages, currents, etc.). b) Find the average power loss in one switching cycle.
Correct me if i am wrong I have studied different formula formula for saturation current.
PLEASE SHOW COMPLETE SOLUTION. USE STORED VALUES AND ROUND OFF ANWER TO THREE DECIMAL PLACES.