WorksheetsAS Physics Electric Circuits
Total questions: 18
Worksheet time: 19mins
Kirchoff's First Law states
the sum of the currents entering any junction in an electric circuit must equal the sum of the currents leaving that junction
the sum of the charges entering any junction in an electric circuit must equal the sum of the charges leaving that junction
the sum of the emfs entering any junction in an electric circuit must equal the sum of the pds leaving that junction
none of these
Kirchoff's second law states
in any closed loop in an electric circuit the algebraic sum of the electromotive forces in the loop is equal to the algebraic sum of the potential differences in that loop
in any closed loop in an electric circuit the vector sum of the electromotive forces in the loop is equal to the vector sum of the potential differences in that loop
in any closed loop in an electric circuit the algebraic sum of the currents in the loop is equal to the algebraic sum of the potential differences in that loop
none of these
Select all true statements
Kirchoff's second law depends on the conservation of energy principle
Kirchoff's first law depends upon the conservation of charge
Kirchoff's second law depends on the conservation of charge principle
Kirchoff's first law depends upon the conservation of energy
Select all true statements
In the dark an LDR has very high resistance in the MΩ range
The output p.d. will be low in the dark
In the light an LDR has very high resistance in the MΩ range
The output p.d. will be high in the dark
Select all true statements
This is a thermistor circuit symbol
This component is a semiconductor
This component resistance decreases as temperature increases
This component resistance decreases as temperature decreases
Select all true statements
This component is a light emitting diode
It only allows current to flow one way
It is temperature dependent
It depends on light intensity
i1 + i5 +i4 = i2 + i3
i1 + i5 +i3 = i2 + i4
i5 + i2 +i4 = i1 + i3
i1 + i5 = i2 + i3 + i4
Which equations are correct?
ε1 - i1R1 - i2R2 = 0
ε1 + ε2 + i3R3 - i2R2 = 0
ε1 - i2R1 - i2R2 = 0
ε1 - ε2 - i3R3 + i2R2 = 0
For this circuit select the correct statements
i1 = 2 A
i3 = 8 A
i2 = 6 A
i2 = i1 + i3
V1 = 17 V
V3 = 15 V
V3 = 4.5 V
V1 = 3.0 V
emf stands for
electron motion force
potential difference
electromotive force
electromagnetic force
The defining word equation for the Volt
energy per unit charge
rate of flow of charge
work per unit time
product of electrical resistance and current
If three 1.5 V cells are connected in series
the combined emf is 4.5 V and it will last as long as a single 1.5 V cell
the combined emf is 1.5 V and it will last as long as a single 1.5 V cell
the combined emf is 4.5 V and it will last longer than a single 1.5 V cell
none of these
If three 1.5 V cells are connected in parallel
the combined emf is 4.5 V and it will last as long as a single 1.5 V cell
the combined emf is 1.5 V and it will last longer than a single 1.5 V cell
the combined emf is 4.5 V and it will last as long as a single 1.5 V cell
none of these
five 100 Ω resistors are connected parallel
20 Ω
120 Ω
200 Ω
500 Ω
Two 4000 Ω are connected in parallel, and then these are connected in series to another pair of parallel wired resistors to give a total circuit resistance of 6000 Ω. What are the possible values of the other pair?
both 8000 Ω
both 4000 Ω
one 5500 Ω and the other 8000 Ω
one 6000 Ω and the other 12000 Ω
To measure the emf of a cell accurately use a
slide wire potentiometer
voltmeter
ammeter
power pack
What current would flow?
0.36 A
1.04 A
0.021 A
0.82 A
