Physics Current Electricity Level: High School
A bird stands on and electric transmission line carrying 2500 A (figure at “click here” ) . The line has 2.5 x 10^-5 ohm resistance per meter and the bird’s feet are 4.0 cm apart . What voltage does the bird feel ?
Physics Current Electricity Level: High School
Can copper wire and aluminum wire of the same length have the same resistance ? Explain ?
Physics Current Electricity Level: High School
When an electric cell is connected to a circuit , electrons flow away from the negative terminals in the circuit . But within the cell, electrons flow to the negative terminals . Explain ?
Physics Current Electricity Level: High School
A proton moving at a speed of 3.8 x 106 m/s cuts across the lines of a magnetic field at an angle of 70 degree. The strength of the field is 0.25 x 10-4 T. What is the magnitude of the force acting on the proton ? (qp = 1.6 x 10 – 19C)a. 5.1 x 10-18 N
b. 9.0 x 10-18 N
c. 1.4 x 10 -17 N
d. 2.3 x 10-17 N
Physics Current Electricity Level: High School
The force on a charged particle created by its motion in a magnetic field is maximum at what angle between the particle velocity and field ?a. zero
b. 180 degree
c. 90 degree
d. 45 degree
Physics Current Electricity Level: High School
The household circuits are wired ina. series
b. parallel
c. both series and parallel
d. neither series nor parallel
Physics Current Electricity Level: High School
As per the figure at “click here” A 10 V emf battery is connected in series with the following : a 2 microF capacitor , a 2ohm resistor , an ammeter , and a switch, initially open; a voltmeter is connected in parallel across the capacitor . At the instant the switch is closed, what are the current and capacitor voltage reading , respectively ;a. zero A. 10 V
b. zero A. zero V
c. 5 A . Zero V
d. 5 A. 10 V
Physics Current Electricity Level: High School
If one double the emf in a circuit and double the resistance in the circuit at the same time. What happens to the currents through the resistors ? Assume there are only emfs and resistors in the circuit .a. They stay the same
b. They quadruple
c. They double
d. They halve
Physics Current Electricity Level: High School
As per the figure at “click here” , what is the current flowing through the 4 ohm resistor ?a. 1 A
b. 2 A
c. 3 A
d. 4 A
Physics Current Electricity Level: High School
As per the figure at “click here” , what is the potential difference between points a and b ?a. 6 V
b. 8 V
c. 12 V
d. 24 V
Physics Current Electricity Level: High School
As per the figure at “click here” hat is the current through the 2 ohm resistor ?a. 1.0 A
b. 0.50 A
c. 1.5 A
d. 2.0 A
Physics Current Electricity Level: High School
Consider the circuit shown in the figure at “click here” . What power is dissipated by the entire circuit ?a. 14W
b. 28 W
c. 52 W
d. 112 W
Physics Current Electricity Level: High School
As per the figure at “click here” how much power is being dissipated by one of the 10 ohm resistor ?a. 24 W
b. 9.6 W
c. 16 W
d. 6.4 W
Physics Current Electricity Level: High School
Three resistors , each with resistance R1, are in parallel in a circuit . They are replaced by one equivalent resistor , R. Compare this resistor to the first resistor of the initial circuit . Which of the following statements is true ?a. The current through R equals the current through R1
b. The voltage across R equals the voltage across R1.
c. The power given off by R equals the power given off by R1.
d. R is greater than R1.
Physics Current Electricity Level: High School
Two resistors of values 6.0 and 12.0 ohm are connected in parallel . This combination in turn is hooked in series with a 2.0 ohm resistor and a 24 V battery . What is the current in the 2 ohm resistor ?a. 2.0 A
b. 4.0 A
c. 6.0 A
d. 12 A
