WorksheetsElectricity-verification
Total questions: 15
Worksheet time: 5mins
Which of the following best explains an electric current?
An electric current is the flow of positive charges in a circuit.
An electric current is the flow of atoms in a circuit.
An electric current is the flow of electrons in a circuit.
An electric current is the flow of neutrons in a circuit.
Which of the following is the SI unit for electric current?
Ohm
Watt
Ampere
Volt
An electric kettle is commonly used to heat up water at home. The heating element used is nichrome wire and not copper. Which of the following reasons best explains why nichrome is used instead of copper?
Nichrome conducts more current than copper, so more heat can be generated.
Nichrome has higher resistance than copper, so more heat can be generated.
Nichrome has higher voltage than copper, so more heat can be generated.
Nichrome are cheaper than copper, so it is more economical.
Which of the following materials is used in a light bulb to produce heat and light?
Nichrome
Copper
Tungsten
Steel
A wire of length /, made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts are equal to-
ρ
ρ2
2 ρ
4 ρ
The temperature of a conductor is increased. The graph best showing the variation of its resistance is-
What will be The resistance whose V-I graph is given above..
To get 2 Ω resistance using only 6 Ω resistors, the number of them required is-
2
3
4
6
Two wires of same length and area made of two materials of resistivity ρ1 and ρ2 are connected in series to a source of potential V. The equivalent resistivity for the same area is-
Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is-
current
voltage
resistance
None of these
