When an electric current flows through a copper wire $AB$ as shown in Figure, the wire.
- ADeflects a magnetic needle placed near it.
- BBecomes red hot.
- ✓Gives electric shock.
- DBehaves like a fuse.
Answer: C.
View full solution →Question types
Electric Current and its Effects question types
329 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
329
Questions
7
Question groups
5
Question types
01
MCQ (1 Marks)
151 Q→02True False[1 Marks ]
17 Q→03Fill In The Blanks With Correct Alternative.[1 Marks Each]
10 Q→041 Marks Question
75 Q→052 Marks Questions
39 Q→063 Marks Question
23 Q→075 Marks Questions
14 Q→Sample Questions
Electric Current and its Effects questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Choose the statement which is not correct in the case of an electric fuse.
- AFuses are inserted in electric circuits of all buildings.
- BThere is a maximum limit on the current which can safely flow through the electric circuits.
- ✓There is a minimum limit on the current which can safely flow in the electric circuits.
- DIf a proper fuse is inserted in a circuit it will blow off if current exceeds the safe limit.
Answer: C.
View full solution →The purpose of armature in an electric bell is:
- ATo make and break the circuit
- BTo produce sound
- CTo produce magnetic field
- ✓To provide spring action
Answer: D.
View full solution →What will happen if the striker of a doorbell is kept in a magnetic field in a direction perpendicular to motion of striker:
- AStriker Hits Harder.
- BStriker rebounds harder.
- CMore current is drawn.
- ✓No effect.
Answer: D.
View full solution →Three bulbs $A, B, C$ are connected in a circuit as shown in Figure. When the switch is $‘ON’$
- ABulb $C$ will glow first
- BBulb $B$ and $C$ will glow simulaneously and bulb $A$ will glow after some time.
- ✓All the bulbs $A, B$ and $C$ will glow at the same time.
- DThe bulbs will glow in the order $A, B$ and $C.$
Answer: C.
View full solution →An electric bell has an electromagnet. $(T/F)$
View full solution →- True
- False
An electromagnet does not attract a piece of iron. $(T/F)$
View full solution →- Ture
- False
When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. $(T/F)$
View full solution →- True
- False
To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. $(T/F)$
View full solution →- True
- False
A fuse is used to save energy in the electric circuits. True/ False.
The safety device based on the heating effect of electric current is called a $.........$
View full solution →When current is switched ‘on’ in a room heater, it $.........$
View full solution →The combination of two or more cells is called a $.........$
View full solution →Longer line in the symbol for cell representsits$.........$terminal.
View full solution →Our body is a $.........$ of electricity.
View full solution →Will the compass needle show deflection when the switch in the circuit shown by figure is closed?
Name any two effects of electric current.
In the circuit shown in figure
What will be the order in which the bulbs $A, B$ and $C$ will glow when the switch is moved to the $‘ON’$ position?
View full solution →What will be the order in which the bulbs $A, B$ and $C$ will glow when the switch is moved to the $‘ON’$ position?
In the circuit shown in figure
Would any of the bulbs glow when the switch is in the $‘OFF’$ position?
View full solution →Would any of the bulbs glow when the switch is in the $‘OFF’$ position?
Name the scientist who discovered the magnetic effect of electric current.
When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.
An electrician is carrying out some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response.
Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain.
One day, Pinki was ironing the clothes in her room. After half an iron of ironing, the light went off and Pinki went outside to the lobby of her house to check it there was any problem in the household circuit. At the same time, she listened the voice of her $4$ years old daughter from the same room where she was ironing the clothes. Her daughter was about to touch the hot electric iron but at the same moment, Pinki entered in the room and pushed her daughter back from that place.
View full solution →- On which effect of electric current, does the electric iron works?
- Mention the values showed by Pinki here.
Will the compass needle show deflection when the switch in the circuit shown by Fig. is closed?
Zubeda made an electric circuit using a cell holder shown in Figure, a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.
Your teacher has shown you the following activity. 
Activity: Teacher has wound a long insulated piece of wire around an iron nail in the form of a coil. Free ends of the wire are connected to a cell through a switch as shown in the Figure. The current is switched on and some pins are placed near the ends of the nail. Write down any three questions that come to your mind about this activity.
Activity: Teacher has wound a long insulated piece of wire around an iron nail in the form of a coil. Free ends of the wire are connected to a cell through a switch as shown in the Figure. The current is switched on and some pins are placed near the ends of the nail. Write down any three questions that come to your mind about this activity.Fig. shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells. 
State one measure to avoid overloading in an electrical circuit. Also mention the name given to a situation in which the live and the neutral wires accidently come in contact. Describe the role of a safety device in this situation.
Paheli took a wire of length $10\ cm$. Boojho took a wire of $5\ cm$ of the same material and thickness both of them connected with wires as shown in the circuit given in figure. The current flowing in both the circuits is the same.
View full solution →- Will the heat produced in both the cases be equal? Explain.
- Will the heat produced be the same, if the wires taken by them are of equal lengths but of different thickness? Explain.
The bulb in the circuit shown in Figure does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.
Figure shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells.
Draw the circuit diagram to represent the circuit shown in figure.
Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the ‘OFF’ position, bulb, cell, switch in the ‘ON’ position, and battery
Describe domestic household circuit.
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