WorksheetsExercise 1 - Electrical Quantities
Total questions: 20
Worksheet time: 3600secs
A resistor converts 350J of electrical energy to other forms of energy. What is the amount of charge that flows through it when a p.d. of 7V is applied across it?
0.20 C
50 C
350 C
2450 C
A wire has a certain electrical resistance.
The diameter and length of the wire may be changed.
Which pair of changes must cause the resistance of the wire to increase?
A
B
C
D
The diagram shows a piece of metal resistance wire. Which wire, made of the same metal, has a smaller resistance?
a wire of greater length with the same diameter
a wire of the same length with a smaller diameter
a wire of greater length with the same diameter
a wire of the same length with a larger diameter
A student wishes to measure first the electromotive force (e.m.f.) of a battery, and then the potential difference (p.d.) across a resistor.
She has the resistor, the battery and some connecting wires. What else does she need?
a voltmeter only
an ammeter only
an ammeter and a voltmeter
a force meter (newton meter) and a voltmeter
A small heater has a rating of 15 V, 4 A. How much energy does it consume if it is turned on for two minutes?
7.5 J
120 J
450 J
7200 J
Which produces an electromotive force (e.m.f.)?
a spring balance
a battery
a resistor
a spring balance
TRUE OR FALSE: The movement or flow of electrons causes the presence of electric current.
True
False
Which of the following is correct?
R = IV
R = I/V
I = R/V
V = IR
What is the unit of measurement of resistance?
Amperes
Ohms
Volts
An electric charge flows form
high energy to low energy
low energy to high energy
The rate of flow of electrons through a wire is known as __________ and is measured using __________.
resistance, Ohms
voltage, Volts
current, Amperes
How can you distinguish between electrical conductors and insulators experimentally?
By observing their color
By measuring their weight
By checking their hardness
By testing their ability to allow electric current to flow
Which of the following materials is an example of an electrical conductor?
Rubber
Glass
Copper
Plastic
What is the unit of measurement for charge?
Volts (V)
Amperes (A)
Coulombs (C)
Ohms (O)
TRUE OR FALSE: Protons, which are located inside the atom of an object, is capable of moving out from their orbit.
True
False
A circuit is set up to measure the resistance of a resistor R. The meter readings are 2,0 A and 3,0 V.
What is the resistance of the resistor R?
0,67Ω
1,5Ω
5,0Ω
6,0Ω
