Electricity
Comprehensive quiz covering current electricity concepts including Ohm's law, power calculations, resistance, conductance, electric charge, series and parallel circuits, and electrical components.
Questions
If resistance decreases, then the current will ___________.
- increase
- remain the same
- decrease
- double
- constant
The direct proportionality between power and voltage used is in which of the given formula -
- P = VI
- V = IR
- P = IR
- Power = energy/time
- P = I2R
What is the maximum power rating in Watts of a resistor, which has a voltage of 12V across it and a current of 50mA flowing through it.
- 0.24 Mwatts
- 4.16 mwatts
- 0.6 watts
- 6000 watts
- 0.4 watt
The unit of current is __________.
- amp
- volt
- coulomb
- watt
- Hz
Which materials consist of a number of free electrons?
- Conductors
- Insulators
- Thermal insulator
- Dielectric
- Wire enamel
The unit of electrical charge is the _____________.
- watt
- Amp
- Hz
- coulomb
- volt
Find the amount of electric charge that flows through the circuit. If current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes.
- 300 C
- 5 C
- 300 C
- 20 C
- 600 C
Give the type of resistor whose tolerance rating is 5% or greater.
- General-purpose
- Wirewound
- Carbon-Composition
- Metal-Film Resistors
- Precision
If a 120 volt light bulb is connected in a circuit then calculate current used by a 100 watt?
- 1.2 amps
- 12000 amps
- 830 mA
- 300 mA
- 12 mamp
Consider if three resistors R1, R2, R3 are connected in parallel and dissipate 20 W by each resistor. Calculate total power?
- 20 W
- 1 W
- 30 W
- 60 W
- 3 W
The resistance value for a blue, gray, red, silver resistor is _______.
- 6,120
- 612
- 6,800
- 6,210
- 601
A wire of a given material has a resistance of 4 Ω. Calculate the resistance of another wire of the same material having length l/2 and area of cross-section 2A?
- 2 Ω
- 0.5 Ω
- 8 Ω
- 1 Ω
- 16 Ω
If 2.5 × 10–6 coulomb of charge from point D to point E, in an electric field requires 6.3 × 10–4 joule of work. Calculate potential difference between points D and E.
- 2.5 × 10–6 V
- 2.5 × 10–2 V
- 0.396 × 10–2 V
- 15.75 × 10–6 V
- 15.75 × 10–2 V
Which device converts Mechanical Energy to Electrical Energy?
- Rheostat
- Generator
- Solar cell
- Battery
- Motor
Give the resistance value for a brown, red, yellow, and gold resistor.
- 1,620
- 1,260
- 1,26,000
- 120
- 1,200
Which of the following is not a type of energy source?
- Rheostat
- Solar cell
- Generator
- Battery
- Motor
If two positively charged materials are placed together then it will __________.
- repel
- attract
- become neutral
- become negative
- become positive
Which of the options correctly show the number of connections a rheostat has?
- 1
- 2
- 4
- 3
- 5
Give the quantities which are same in all the part of series circuit:
- voltage
- current
- resistance
- power
- energy
If 8 ohm is the resistance then what is the conductance?
- 16 ms
- 4 ms
- 8 ms
- 125 mS
- 12.5 ms
Electrons present in the outer orbit are called __________.
- valences
- nuclei
- waves
- shells
- bound
Two positively negatively charged materials placed together will _________.
- attract
- repel
- become neutral
- become negative
- become positive
Charge 8/10 passes a point in 4 s. Then current in amperes is __________.
- 11 A
- 40 A
- 0.2 A
- 5 A
- 320 A
Resistor consisting of a three-terminal variable is known as a ___________.
- rheostat
- potentiometer
- thermistor
- wiper
- varistor
When the current is 2.5 A then calculate charge per point in 0.2 s?
- 0.5 C
- 12.5 C
- 0.08 C
- 1 C
- 0.008 C