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Worksheets2.2 Electric current and Potential Differences
Total questions: 10
Worksheet time: 5mins
A potential difference of 24 V is applied to a 150 resistor. How much current flows through the resistor?
0.15 A
3600 A
6.25 A
0.16 A
When lighting happen,25 C charge is transferred from could to the ground and 1.25x1010 J energy is produced. Calculate the potential difference within cloud and the ground in unit Volt
4.00 x 108
2.00 x 108
3.00 x 108
5.00 x 108
What is the function of rheostat?
To control the resistance in the circuit
To control the potential difference in the circuit
To control the current in the circuit
To control the power in the circuit
............... state that the current flowing through an ohmic conductor is directly proportional to the potential difference across its end,provided that its temperature and the other physical conditions remain constant.
Pressure Law
Ohm’ s Law
Charles Law
Ohmic Law
Gradient of graph refer to
Internal resistance
External resistance
Electromotive force
Power
Resistance is defined as
Ratio of potential difference to the current
Ratio of current to the potential difference
Factors affecting resistance of the constantan wire except
Temperature
Length
Cross-sectional area
Type of material
Current
Define electric current
the total charge, Q flowing through the area per unit time, t.
the total current, I flowing through the area per unit time, t.
the rate of capacitance flow through a conductor.
the rate of current flow through a conductor
From the equation, we know that the resistance of a conductor depends on..?
length of conductor
cross sectional area
type of material
volume of the wire
