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
Physics Current Electricity Level: High School
Three resistors connected in parallel have individual values of 4.0 , 6.0 and 10.0 ohm respectively . If this combination is connected in series with a 12-V battery and a 2.0 ohm resistor , what is the current in the 10 ohm resistor ?a. 0.59 A
b. 1.0 A
c. 11 A
d. 16 A
Physics Current Electricity Level: High School
As shown in the figure at “click here’ which resistor is in series with resistor R ?a. R1
b. R2
c. R3
d.R4
Physics Misc Topic Level: Misc Level
When a 24.0 ohm resistor is connected across a 12.0 V battery , a currenof 482 mA flows . What is the resulting terminal voltage of the battery ?a. 0.4 V
b. 5.8 V
c. 11.6 V
d. 12.0 V
Physics Current Electricity Level: High School
When a 24.0 ohm resistor is connected across a 12.0 V battery , a currenof 482 mA flows . What is the resulting terminal voltage of the battery ?a. 0.4 V
b. 5.8 V
c. 11.6 V
d. 12.0 V
Physics Current Electricity Level: High School
The two ends of a 3.0 ohm resistor are connected to a 9.0V battery . What is the total power delivered by the battery to the circuit ?a. 3.0 W
b. 27 W
c. 0.33 W
d. 0.11 W
Physics Current Electricity Level: High School
An 8.00 ohm resistor is dissipating 100 watts . What are the current through it , and the difference of potential across it ?a. 12.5 A, 28.3 V
b. 3.54 A, 12.5 V
c. 3.54 A, 28.36V
d. 28.3 A, 3.54 V
Physics Current Electricity Level: High School
The heating coil of a water heater has a resistance of 20 ohm and operate sat 210 V . How long a time is required to raise the temperature of 200 kg of water from 15 degreeC to 80 degreeC ? ( The specific heat for water = 103 cal/kg. degreeC and 1.0 cal = 4.186 J .)a. 1.7 h
b. 3.8 h
c. 5.1 h
d. 6.9 h
Physics Current Electricity Level: High School
A steam turbine at an electric power plant delivers 4500 kW of power to an electrical generator which converts 95% of this mechanical energy into electrical energy . What is the current delivered by the generator if it delivers at 3600 Va. 0.66 x 103 A
b. 1.0 x 103 A
c. 1.2 x 103 A
d. 5.9 x 103 A
Physics Current Electricity Level: High School
The temperature coefficient of resistivity for a “perfect” ohmic material would be .a. positive and constant.
b. zero .
c. negative .
d. positive and uniformly increasing .