1) What are the materials required for part (a) of this experiment?
A battery, a plug key, connecting wires, an ammeter, a voltmeter, a rheostat, a piece of sandpaper and two resistors of varied values are the materials required for part (a) of this experiment.
2) What are the materials required for part (b) of this experiment?
Two resistors of varied values, a battery of 6 volts, an ammeter, a plug key, connecting wires, a piece of sandpaper, a voltmeter and a rheostat are the materials required for part (b) of this experiment.
3) What is meant by resistance?
Resistance is the opposition that a material exerts against the flow of current.
4) What is a resistor?
A resistor is a passive electrical device that provides electrical resistance in an electrical circuit. A resistor is used to decrease the flow of current, regulate signal levels, bias active components, etc.
5) What is meant by the electrical current?
An electric current is the flow of charged particles such as ions or electrons. They typically move through a space or an electric conductor.
6) What is an ammeter?
An ammeter is an electrical instrument used for measuring either alternating or direct electrical current.
7) What is a voltmeter?
A voltmeter is an electrical instrument used for calculating the electric potential difference across two points in a circuit.
8) What are the two fundamental types of resistors?
Linear resistors and variable resistors are the two fundamental types of resistors.
9) What are the main types of variable resistors?
Potentiometer, thermostat, and trimmer resistor are the main types of variable resistors.
10) What is a rheostat?
A rheostat is a type of variable resistor which is mainly used to regulate current. It is able to change the resistance without interruption.
11) What are the ways through which resistors are connected in an electric circuit?
Resistors are connected in series, parallel or a combination of series and parallel connections.
12) When resistors are connected in parallel, what would be the nature of the total resistance?
The total resistance will be comparatively less when resistors are connected in parallel.
13) When resistors are joined in parallel, what quantities stay constant in the electrical circuit?
When resistors are connected in parallel, the current does not remain constant, but the potential difference remains constant.
14) What is the commonly used type of connection applied while wiring a house?
Typically, the connections of every circuit in a conventional house are always in parallel.
15) What is the quantity that stays constant in a parallel connection?
Voltage stays the same in a parallel connection.
16) How do you measure the total resistance when three electrical resistors are combined in parallel?
Total resistance Rp can be calculated using the following formula:
1/Rp = 1/R1 + 1/R2 + 1/R3
17) What is the ideal connection orientation for household appliances?
Household electrical appliances should be linked in parallel to provide equal voltage for every appliance.
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