Electric Circuits Answers

When Asinusoidal current of maximum value of 20mA flows through aresistor ,the p.d across its ends is 400V maximum .find the energy dissipated by resistor in a time of 5minutes

Physics Drill: Ohm’s Law. Solve the problem using the principles of Ohm’s

Law below. Show your complete solution.

1. Find the current through a resistor of resistance 𝑅 = 2Ω if the voltage across

the resistor is 6V.

2. While repairing an electric bulb socket, an electrician gets a mild shock when a

current of 0.0050 A passes through him. The same electrician was killed by a

current of 0.15 A when he turned on an electric bulb while taking a bath. The

voltage in each situation is equal to 120 V. Find the resistance of the electrician

in each situation.

3. A typical value of the resistance of a person from hand to hand through the

body is 2,000 Ω. If a person with this resistance accidentally touches a 220 V

live wire, what current passes through the person?

Physics Drill: Voltage Solve the problems about Voltage below. Show your

complete solutions.

1. It takes 20 J of work to push 4C of charge across the filament of a bulb. Find

the potential difference across the filament.2. The potential difference between two terminals of a cell is 3V. Find the Work

done in moving 5C of charge across the cell.

3. A group of electrons of net magnitude of charge, 𝑄 = 0.50 𝐶, passes through a

cell of voltage, 𝑉𝑐𝑒𝑙𝑙 = 20𝑉, from the (+) to the (-) terminal. What is the change

in energy, ∆𝐸, of the group of electrons as they move across the terminals?

Physics Drill: Electric Current. Fill in the missing information by solving for

the problem about electric current below:1. If the current in a wire is one ampere, then ___ coulomb(s) of charge flows past a

point in the wire every ____ second(s).

2. When 8 coulombs of charge flow past a point in a circuit in 2 seconds, the current

is ______.

3. If the current at appoint in a circuit is 1.5 A, then ____ of charge flow past this point

every second.

4. If the current at a point in a circuit is 0.75 A, then ___ of charge flow past this point

every 5 seconds.

5. If the current in the wire is 0.80 A, then it takes ___ seconds for 2.4 C of charge to

flow past this point in the wire

The distance between the electrodes is 2.6 cm. If the dielectric strength of the dry air between is 3 x 10^6 V/m, what is the voltage across the electrodes when the arc first forms?

Which of the followinv is an ohmic material?

a. dirty water

b. breast implant

c. tin cans

d. CD and DVD

Given that C₁=10.0F, C₂=5.0F, and C3=4.0F, find the total capacitance for each connection shown.

Calculate 𝐼1,𝐼2,𝐼3,𝐼4,𝐼5 and 𝐼6.

Three resistors with values of 60.0Ω, 30.0 Ω, and 20.0 Ω, respectively, are

connected in series to a 110.0 V battery of negligible internal resistance. (a) Draw a circuit diagram and find the (b) equivalent resistance of the combined resistors, (c) current flowing through each resistor, (d) voltage drop across each resistor.

Two point charges are placed as follows: charge q_{1} = - 1.50nC is at y = 6.00 m and charge q_{2} = 3.20nC is at the origin. What is the total force (magnitude and direction) exerted by these two charges on a negative point charge q_{3} = - 5.00nC located at (2.00 m, -4.00 m)?