2051

Physics Current Electricity Level: High School

Three resistors of 4.0 , 6.0 and 10.0 ohms are connected in parallel . If the combination is connected in series with a 12.0 V battery and a 2.0 Ohm resistor , What is the current through the 10.0-Ohm resistor ?

2023

Physics Current Electricity Level: High School

Some light bulbs are connected in parallel to a 120 V source as shown in the figure at “click here” . Each bulb dissipates an average power of 60 W. The circuit has a fuse F that burns out when the current in the circuit exceeds 9A . Determine the largest number of bulbs ,which can be used in the circuit without burning out the fuse .

a) 9

b) 17

c) 25

d) 34

e) 36

2013

Physics Current Electricity Level: High School

Find the current in each resistor in the figure at ‘click here’

1942

Physics Current Electricity Level: High School

The following are connected in a series circuit : 6.0 V battery , 9.0 V battery , 45 ohm resistor . Use the loop rule to find the current if the batteries are

a) aiding

b) opposing

1322

Physics Current Electricity Level: High School

What is the current in the 5 ohm resistor in the circuit shown at “click here” ?

552

Physics Current Electricity Level: High School

A 100-W light bulb has a resistance of about 12 ohm When cold ( 20 degreeC) and 140 ohm when on (hot) . Estimate the temperature of the filament when”on “ assuming an average temperature coefficient of resistivity ‘infinite’ = 0.0060 (Cdegree)^-1 .

524

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

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

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