Electric Circuits Answers

•In a circuit with a 100 ohm resistor and a 47 ohm resistor in series, there are 20 mA of current through the 100 ohm resistor. How much current is through the 47 ohm resistor?

A certain electrical device has an unknown resistance. You have available a 12 V battery and an ammeter. How would you determine the value of the unknown resistance? Draw the necessary circuit connections.

A certain Resistor is required to dissipate

0.25W. What standard rating should be used?

1. Eight groups of cells are in parallel. Each group consists of  four cells, each of emf 4 V and internal resistance 0.5 Ώ, In series. Determine the power supplied to 4 Ώ resistor by this battery system

A plane flies from base camp to lake A, a distance of 280 km at a direction of 20 degrees north of east. After dropping off supplies, the plane flies to lake B, which is 190km and 30 degree west of north from lake A.

draw and label Parabolic Reflector Antenna and explain

The rubber cord of a catapult has a cross sectional area 1.0mm^2 and a total unstretched length 10.0cm. It I stretched to 12.0cm and then released to project a missile of mass 5.0g. From energy considerations, or otherwise, calculate the velocity of projection, taking the young modulus for the rubber as 5.0x10^8 Pa. State the assumptions made in your calcukation

a three resistors of 4ohms, 12 ohms and 5 ohms are connected in parallel. if total current is 12A, find the current through each resistor

The rate at which charge flows through a series circuit is inversely proportional to the amount of overall resistance in the circuit. Based on the results in Experiment 2, which one of the following rules accurately describes the effect of the number of bulbs upon overall current and overall resistance?

a. Increasing the number of bulbs will cause both the current and the resistance to increase. b. Increasing the number of bulbs will cause both the current and the resistance to decrease. c. Increasing the number of bulbs will cause the current to increase and the resistance to

decrease.

d. Increasing the number of bulbs will cause the current to decrease and the resistance to

increase.

The rate at which charge flows through a series circuit is inversely proportional to the amount of overall resistance in the circuit. Based on the results in Experiment 2, which one of the following rules accurately describes the effect of the number of bulbs upon overall current and overall resistance?

a. Increasing the number of bulbs will cause both the current and the resistance to increase. b. Increasing the number of bulbs will cause both the current and the resistance to decrease. c. Increasing the number of bulbs will cause the current to increase and the resistance to

decrease.

d. Increasing the number of bulbs will cause the current to decrease and the resistance to

increase.