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Worksheetscurrent electricity-Class Test
Total questions: 20
Worksheet time: 10mins
A Carbon Resistor is marked in colour bands of Red, Black,Orange,Silver.What is the resistance and tolerance value of the resistor ?
20 kilo ohm & +- 10%
18 kilo ohm & +-5%
25 kilo ohm & +- 10%
20 kilo ohm
Is current density a scalar or vector quantity ?
(a)
A cell of emf (E) and internal resistance (r) draws a current (I). Write a relation between terminal voltage (V) in terms of E,I,r. ?
(a)
Though we specify the direction of direct current by putting an arrow, why is it not considered a vector quantity ?
Because current does not obey the laws of vector addition
Because charge is Quantized
Because conventional direction of current is only virtual
Because current obeys Kirchhoff Laws
As the temperature of a conductor increases both it's Resistivity and Conductivity change.Will the ratio of its Resistivity and conductivity
Increases
Decreases
Remain same
None of these
Current carriers in Electrolyte are/is
Free electrons
Holes
Electrons and holes both
Positive and negative ions
What will be the new resistivity of a metallic wire if it's length becomes double
Increases two times
Becomes half
Increases four times
Remains same
An electrical component that we use in electronics circuits to limit current though an active component or to reduce voltage in the circuit.
Capacitor
Current
Resistor
Ancestor
What is the unit of measurement for resistance?
Voltage
Ampere
Watts
Ohms
A resistor's first three color bands are brown, black, and red. What is its value?
10 ohms
10K ohms
200 ohms
1000 ohms
Which digit on the 1st band does the color yellow denote on a resistor color band?
3
2
4
7
A 47K ohm resistor would have which colors on its first three bands?
Yellow, Violet, White
Yellow, Violet, Orange
Red, White, Blue
Orange, Yellow, Violet
Which of these colors is NOT used in the resistor value color code?
White
Black
Violet
Pink
The gold color band refers to__________tolerance.
+ / - 20%
+ / - 10%
+ / - 5%
zero
What color that has a multiplier of x1000
Red
Orange
Blue
Brown
What is the resistance for a Red, Green, Blue color resistor?
250,000 ohms
25K ohms
25,000,000 ohms
250K ohms
A 3.0 Ω resistor and a 6.0 Ω resistor are connected in parallel.What is their combined resistance?
0.50Ω
2.0Ω
4.5Ω
9.0Ω
The circuit diagram shows a 4.0 Ω resistor and an 8.0 Ω resistor connected to a 6.0V battery. What is the current in the battery?
0.50A
0.75A
1.50A
2.00A
The internal resistance of a cell is the resistance of
Material used in the cell
Electrolyte used in the cell
Electrodes of the cell
vessel of the cell
