Electrons flow from …………… terminal to …………… terminal in a conductor when a potential difference is applied.
- ✓Negative to positive
- BNeutral to positive
- CPositive to negative
- DPositive to neutral
Answer: A.
View full solution →Question types
Current Electricity question types
139 questions across 11 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
139
Questions
11
Question groups
5
Question types
01
Write the Correct Alternative.
20 Q→02Find the odd one out.
4 Q→03Write the following Statement Is True Or False. & Write True Statement.
12 Q→04Answer the following in one sentece.
21 Q→05Answer the following questions in detail.
45 Q→06Distinguish Between.
5 Q→07complete the Graph/Table.
6 Q→08Answer the following question.
11 Q→09Read The Folowing Paragraph and answer the questions.
1 Q→10Answer the following question.
6 Q→11Give scientific Reasons For The Following.
8 Q→Sample Questions
Current Electricity questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Good conductors contain a large number of ………….. .
- AProtons
- BNeutrons
- ✓Free Electrons
- DGravitons
Answer: C.
View full solution →$1 \mu V = .............. V$
- A$10^2$
- ✓$10^{-6}$
- C$10^6$
- D$10^3$
Answer: B.
View full solution →To decrease the effective resistance in a circuit, the resistances are connected in ………….. .
- ASeries
- ✓Parallel
- CReversed
- DDisconnect
Answer: B.
View full solution →Resistances are connected in …………… so as to pass the same current through them.
- ✓Series
- BParallel
- CReversed
- DDisconnect
Answer: A.
View full solution →Graphite, Diamond, Fullerenes, Coal
Wood, Glass, Steel, Rubber
Rubber, Silver, Copper, Gold
Voltmeter, Ammeter, Galvanometer, Thermometer
Fuse is made of wire having high melting point.
Ammeter is connected in parallel to the cell to measure current.
Resistance of a conductor is inversely proportional to the length of the conductor.
The unit of potential difference is ampere.
Charges are measured in ampere.
Write formula : Resistivity
Write formula : Current
Write formula : Electric resistance
Write formula : Potential difference
Write formula : Electric charge
If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current? (Answer : 1.4 A)
When two resistors are connected in series, their effective resistance is 80Ω. When they are connected in parallel, their effective resistance is 20Ω. What are the values of the two resistances? (Answer : 40Ω, 40Ω)
Solve the following problems.
The resistance of a 1m long nichrome wire is 6Ω. If we reduce the length of the wire to 70 cm. what will its resistance be? (Answer : 4.2Ω)
$x = x_1 + x_2 + x_3$
$\text { f. } x=\frac{1}{\frac{1}{x_{1}}+\frac{1}{x_{2}}+\frac{1}{x_{3}}}$
View full solution →$\text { f. } x=\frac{1}{\frac{1}{x_{1}}+\frac{1}{x_{2}}+\frac{1}{x_{3}}}$
The potential difference across $x_1, x_2$ and $x_3$ is the same
View full solution →Electric current and Potential difference
Resistance in Series and Resistance in Parallel
Conductors and Insulators
Ohmic conductors and Non-Ohmic conductors
Voltmeter and Ammeter
If a number of resistors are connected in parallel,
If resistors are connected in series,
Complete the following table:
(1) Protection from Electricity
(2) Resistance
(3) Resistivity
Explain with the help of a diagram, what are free electrons and how they move through the conductor?
Three resistances 15Ω, 20Ω and 10Ω are connected in parallel. Find the effective resistance of the circuit.
If three resistors $15Ω, 3Ω$ and $4Ω$ each are connected in series, what is the effective resistance in the circuit?
View full solution →A current of 0.24 A flows through a conductor when a potential difference of 24 V is applied between its two ends. What is its resistance?
The length of a conducting wire is 50 cm and its radius is 0.5 mm. If its resistance is 30Ω, what is the resistivity of its material?
The resistance of the filament of a bulb is 1000Ω. It is drawing a current from a source of 230 V. How much current is flowing through it?
Electric switches and sockets should be fitted at a height at which small children cannot reach and put pins or nails inside. Plug wires should not be pulled while removing a plug from its socket. Before cleaning an electrical appliance it should be switched off and its plug removed from the socket. One’s hands should be dry while handling an electrical appliance, and, as far as possible, one should use footwear with rubber soles. As rubber is an insulator, it prevents | the current from flowing through our body, thereby protecting it. If a person gets an electric shock, you should not touch that person. You should switch off the main switch and if the switch is too far or you do not know where it is located, then you should remove the plug from the socket if possible. If not, then you should use a wooden pole to push the person away from the electric wire.
(i) Why should the electrical sockets be fitted at a certain height?
(ii) Why plug wires should not be pulled out while removing any electrical device?
(iii) Why should a person wear footwear with rubber soles while handling electrical appliances. .
(iv) Saee is touching an electrical button socket with wet hands what will you advise her and why?
(v) Sneha is getting an electrical shock what will you do the save her life?
(vi) Give a title to the above passage
(i) Why should the electrical sockets be fitted at a certain height?
(ii) Why plug wires should not be pulled out while removing any electrical device?
(iii) Why should a person wear footwear with rubber soles while handling electrical appliances. .
(iv) Saee is touching an electrical button socket with wet hands what will you advise her and why?
(v) Sneha is getting an electrical shock what will you do the save her life?
(vi) Give a title to the above passage
Complete the incomplete figure and give an explanation:
Show motion of electrons in an circuit and explain precautions while using an electrical device.
Make the concept diagram of an electrical circuit and explain the working of a fuse.
Find the expression for resistivity of a material.
Find the expression (i.e., derive the expression) for the resistors connected in parallel.
In streetlights, bulbs are connected in parallel.
Lightning occurs from sky to earth.
A parallel combination of resistances decreases the effective resistance of the circuit.
A series combination of resistances is used to increase the resistance of a circuit.
A thick wire has a low resistance.
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