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In this quiz, you are going to solve questions related to Electric Current, Resistance, Resistivity, Power, Energy, Series and Parallel Connections, SI units.
Consider the following statements and choose the correct one about electric charge:
Unit of electric power may also be expressed as
Two resistors of resistance 2Ω and 4Ω when connected to a battery will have
An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it?
In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?
1 kWh is equal to
The unit of e.m.f. of a cell is
Conventionally, the direction of the current is taken as
The direction of flow of negative charge
The direction of flow of atoms
The direction of flow of molecules
The direction of flow of positive charge
Materials which allow larger currents to flow through them are called
Insulators
Conductors
Semiconductors
Alloys
Kilowatt hour is the unit of
Power
Energy
Impulse
Force
An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?
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
The electrical resistance of insulators is
High
Low
Zero
Infinitely high
The resistivity of insulators is of the order of
10^-8 Ω-m
10^1 Ω-m
10^-6 Ω-m
10^6 Ω-m
100 J of heat is produced each second in a 4Ω resistor. The potential difference across the resistor will be:
30 V
10 V
20 V
25 V
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