current of 5A passes through a wire. The number of electrons crossing a point in the wir

Q: 10. Determine the current through the ammeter in the circuit with (a) two light bulbs in parallel…

A: Resistance of each bulb = 4 ohm VT = 12 volts

Q: A certain wire has resistance R. Another wire of the same material has half the length and half the…

A:

Q: shows a junction with currents labeled I1 to I6. Which of the following statements is correct?

A:

Q: In the circuit of the figure below, the current I, is 3.1 A and the values of E and R are unknown.…

A:

Q: What current will be needed to produce a voltage of 520 V cross a 12 kQ resistor? (Express your…

A: The resistance of the resistor is R = 12 kΩ. The voltage across the resistor is V = 520 V. As per…

Q: During an electricity investigation, a student stated, “When the voltage increases current…

A: Given data:  When the voltage increases current increases Required: The equation that describes the…

Q: Car batteries are usually rated in A - h (ampere - hours), which is a unit of charge. This rating…

A: 1 A hr = 3600 Coulumbs  Thus 232 A hr = 835200 C

Q: You have a typical resistance of 100 kn. A) How much current could a 12V car battery pass through…

A:

Q: A 100W light bulb is turned on.  It has an operating voltage of 120V.   a) How much current flows…

A: Using Ohm's law which is given by, VI=R And power is  P=IV

Q: A defibrillator passes 12.0 A of current through the torso of a person for 0.0100 s. a) How many…

A: Given data:   Current (I) = 12.0 A Time (t) = 0.0100 s Required: Charge (q) and Number of electrons…

Q: Determine (a) the current through the 18 V battery and (b) the potential difference between points a…

A: Use Kirchhoff's current law and Kirchhoff's voltage law to calculate the currents flowing in the…

Q: 19) The resistance of R, is 50 and R, is 100. R, is made of a nichrome wire (resistivity of 1.5 x 10…

A: The resistance R and the resistivity ρ of a wire are related to each other by the formula, R=ρLA…

Q: 12) A heart defibrillator passes 12 A of current through a patient's torso for 3×10´s to restore…

A: Given: Current, I=12 A Time, t=3×10-3 s   To determine: (a) charge passed through body. (b) Voltage…

Q: 14) What is the minimum number of 65 Ohm resistors that must be connected in parallel to produce an…

A: The resistance of the each resistor is R=65 Ω. The equivalent resistance is Req=11 Ω.   We have to…

Q: A potential difference of 120 V is applied across a resistor of unknown resistance. If the heat…

A:

Q: If R1 = 20, R2 = 4N, R3 = 60, determine the electric current flows in the circuit below. E =9 V www…

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Q: A resistor of 9 ohms is carrying  a current of 4 amperes.  What is the voltage that would be…

A: Given data:  Resistance (R) = 9 Ω Current (I) = 4 A Required: Voltage (V)

Q: The chemical reaction in a particular battery provides 4.8 10-19 J of work for each electron it…

A: The problem can be solved by using the concept of potential. We know that potential is energy…

Q: The resistance of the skin on a person's finger is typically about 37,000 N. How much voltage would…

A: According to Ohm's law, the current through a conductor between two points is directly proportional…

Q: Describe the physical quantity electrical resistance of a wire made from a given material, length L,…

A: Answer:-  Electrical Resistance (R) of a wire depends upon the length (L) and area of cross section…

Q: Complete the following statement: The sum of the magnitudes of the currents directed into a junction…

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Q: A current of 4.50 A flows in a conductor for 9.50 s. How many electrons pass a given point in the…

A: Given data:  Current (I) = 4.50 A Time (t) = 9.50 s Required: The number of electrons (n)

Q: Two batteries with emf &₁ and E2, with internal resistances ₁ and ₂ respectively, are connected as…

A:

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.