523

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




522

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




521

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




520

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




519

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.




518

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




517

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




516

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




515

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




514

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




513

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




512

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




511

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




510

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 V

a. 0.66 x 103 A

b. 1.0 x 103 A

c. 1.2 x 103 A

d. 5.9 x 103 A




509

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 .

(a) positive and constant

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