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WorksheetsScience - Electricity
Total questions: 24
Worksheet time: 18mins
How is a voltmeter connected in the circuit to measure the potential difference between two points?
According to the situation either series or parallel
Series
Parallel
None of the above
SI unit of electric current is ___________.
Ampere
Ohm
Coulomb
Volt
Ammeter is used to measure ___________.
Resistivity
Electric Current
Voltage
Resistance
Ohm's law is applicable only when ___________.
Temperature remains constant
Temperature increases
Temperature decreases
None of the above
What is the SI unit of electric charge?
Coulomb
Ampere
Volt
Ohm
Calculate the amount of charge that would flow in 1 hour through the element of an electric bulb drawing a current of 0.2 A. [Use I = Q/t]
720 C
700 C
300 C
320 C
The solution which conducts electricity is known as ____________.
Insulator
Electrolyte
Conductor
None of the Above
An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, power consumed will be ---------------. [Use P = (V X V)/R]
100 W
25 W
75 W
50 W
SI unit of resistivity (specific resistance) is ____________.
Ohm meter
Volt
Ampere
Ohm
An electric iron of resistance 20 ohm takes a current of 5 A. Calculate the heat developed in 30 s. [Use H = I x I x R x t]
2000 joules
30000 joules
15000 joules
1000 joules
Electrical potential is ____________.
Scalar quantity
Vector quantity
Both scalar and vector
Neither scalar nor vector
What is the maximum resistance which can be made using five resistor each of 1/5 ohm?
1/5 ohm
5 ohm
1 ohm
10 ohm
When a 4 ohm resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is ___________.
0.5
2
1
4
When a 12 V battery is connected across an unknown resistor, there is a current 2.5 mA in the circuit. Find the value of resistance of the resistor. [Use V = IR]
1000 ohm
4800 ohm
6700 ohm
2000 ohm
The property of a conductor by which it obstructs the flow of current is known as _____________ of the conductor.
Conductivity
Power
Voltage
Resistance
Calculate resistance of an electric bulb which allows a 10 A current when connected to 220 V power source. [Use V = IR]
22 ohm
12 ohm
10 ohm
32 ohm
The work done to bring unit positive charge from infinity to a point in an electric field is known as____________.
Resistance
Current
Charge
Potential
Electrical resistivity of a given metallic wire depends upon ____________.
It's Thickness
It's Shape
It's Length
Nature of the Material
If the current flowing through a fixed resistor is halved, the heat produced in it will become _____________.
Double
One-half
Four times
One-fourth
What is the direction of conventional current?
Depends on the condition
Negative terminal to Positive terminal
Positive terminal to Negative terminal
None of the above
An electric iron has a rating of 750 W, 220 V. Calculate current passing through it. [Use P = IV]
6 A
3.4 A
7 A
5 A
Keeping the potential difference constant, the resistance of the circuit is halved, the current will become _____________.
One-third
Four times
Double
Half
What is the minimum resistance which can be made using five resistors each of 1/5 ohm?
1/5 ohm
1/10 ohm
1/25 ohm
None of the above
SI unit of resistance is __________.
Ohm
Coulomb
Volt
Ampere
