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WorksheetsT3 PS: Internal Resistance in Circuits
Total questions: 21
Worksheet time: 5hrs 15mins
Caitlyn says that Ohm's law is defined as The potential difference across a conductor is indirectly proportional to the current in the conductor at constant temperature.
Is this definition correct or not?
Write only yes or no.
(a)
Refer to figure alongside - click on the image to enlarge.
The reading on ammeter A2 is 0,6 A when switch S is closed.
Calculate reading on voltmeter V1.
2 V
2,4 V
2,5 V
The reading on ammeter A2 is 0,6 A when switch S is closed.
Current through the 6 Ω resistor
- click on the image to enlarge.
0,4 A
2,4 A
6 A
Refer to figure alongside - click on the image to enlarge.
The reading on ammeter A2 is 0,6 A when switch S is closed.
Calculate reading on voltmeter V2.
5 V
5,8 V
6 V
Refer to figure alongside - click on the image to enlarge.
The reading on ammeter A2 is 0,6 A when switch S is closed.
Calculate the Emf of the battery.
8,2 V
0,8 V
9 V
Refer to figure alongside - click on the image to enlarge.
The reading on ammeter A2 is 0,6 A when switch S is closed.
Calculate the energy dissipated as heat inside the battery if the current flows in the circuit for 15 s
12 J
15 J
0.8 J
Refer to figure alongside - click on the image to enlarge.
Calculate the resistance of the variable resistor.
4 Ω
0,7 Ω
Refer to figure alongside - click on the image to enlarge.
The resistance of the variable resistor is now decreased.
State whether the speed at which the wiper turns will INCREASE, DECREASE or REMAIN THE SAME.
(a)
Refer to graph alongside - click on the image to enlarge.
Which ONE of the two conductors, X or Y, is ohmic? write only X or Y.
(a)
Refer to figure - click on the image to enlarge.
Calculate the ammeter reading when switch S is closed.
0,33 A
3 A
Refer to figure - click on the image to enlarge.
The switch S is now open.
When switch S is closed the ammeter reading is 0,33 A. will the reading INCREASE, DECREASE or REMAIN THE SAME when the switch is open?
(a)
Refer to figure - click on the image to enlarge.
How will the voltmeter reading now compare with the voltmeter reading when the switch is closed? Choose from INCREASE, DECREASE or REMAIN THE SAME.
(a)
Refer to figure - click on the image to enlarge.
Calculate the Current in the 8 Ω resistor.
2 A
21 A
2,73 A
Refer to figure - click on the image to enlarge.
Calculate the Equivalent resistance of the resistors in parallel.
20 Ω
12 Ω
Refer to figure - click on the image to enlarge.
Calculate the Internal resistance r of the battery.
1,98 Ω
2 Ω
Refer to figure - click on the image to enlarge.
Calculate the Heat dissipated in the external circuit in 0,2 seconds.
29 J
29,81 J
30 J
Refer to figure - click on the image to enlarge.
Calculate the current in the 8 Ω resistor.
1 A
1,62 A
2 A
Refer to figure - click on the image to enlarge.
Calculate the Potential difference across the 5 Ω resistor.
5 A
5,42 A
5,2 A
Refer to figure - click on the image to enlarge.
Calculate the total power supplied by the battery.
32 W
32,4 W
31 W
Refer to figure - click on the image to enlarge.
Calculate the value of X
1 W
1,37 W
1,4 W
Refer to figure - click on the image to enlarge.
Given: X=1,37 W
Calculate the resistance of resistor T.
19,37 Ω
19,5 Ω
