This is a quiz on Electric Current and Its Effects for 7th-grade students. Electric current: - When there is a net current of electric charge through a metal wire, it is called an electric current, or an electric current is the flow of charged particles. The current is measured using a device called an ammeter, and its SI unit is the ampere (A). Mainly three of the current There are effects, heating, chemical, and magnetic effects. The definition of the three effects is something like this. 1. Heating effect: - The conversion of electrical energy into heat energy is called 'Joule heating' or heating effect. 2. Chemical effects: - The passage of electric current through a conductor liquid causes chemical reactions, the resulting effects are called chemical effects of currents. 3. Magnetic effect: - A wire or a conductor that conducts an electric current develops a magnetic field perpendicular to the direction of current flow. Is called the magnetic effect. So let's start this quiz and know about Electric Current And Its Effects. "Best of luck".
1. Who was the father of Electric current?
A. Galileo Galilei
B. Michael Faraday
C. Benjamin Franklin
D. Maria Sibylla Merian
2. Choose the name of the one device that works on the basis of the magnetic effects of current?
A. Bulb
B. Wire
C. Television
D. Loudspeaker
3. What is the name of the device which is used these days in place of electric fuses in electrical circuits?
A. Miniature Circuit Breaker(MCB)
B. Plastic Circuit Breaker (PCB)
C. Magnetic Circuit Breaker (MCB)
D. Rubber Circuit Breaker (RCB)
4. Who discovered the electric current and in which year?
A. Thomas Edison, 1659
B. James Watson, 1579
C. Benjamin Franklin, 1759
D. Noam Chomsky, 1769
5. Who has discovered the magnetic effect of electric current?
A. Alain Aspect
B. David Baltimore
C. Hans Christian Oersted
D. Timothy Berners- Lee
6. Select the name of two electric appliances where the heating effect of the electric current is used?
A. Boiler,Room heater
B. Electric Iron, Trimmer
C. Room Bell, Microwave
D. Fan, Electric bulb
7. Why nichrome wire is used as the heating element?
A. Because it has high conductivity
B. Because it has low melting point
C. Because it has high specific resistance
D. Because it has low specific resistance
8. Which unit is used to measure electric resistance?
A. Volt
B. Ohm
C. Joule
D. Ampere
9. If an electric circuit from the positive terminal of the battery to the negative terminal of the battery is complete, then the circuit is?
A. Open
B. Closed
C. Disconnected
D. Connected
10. If electric current flows through a conductor, the conductor becomes ....
A. Cold
B. liquid
C. Vapor
D. Hot
11. Which of these materials is a good conductor of electric current?
A. Rubber
B. Plastic
C. Cooper
D. Wood
12. Which device is used in electric current for circuit flow starts and stops?
A. Switch
B. Wire
C. Battery
D. All of above
13. Which of these materials is used for an insulator?
A. Cooper
B. Rubber
C. Wood
D. None of these
14. What's called, when a steady flow of electricity?
A. A light
B. A Switch
C. A current
D. A Battery
15. Which types of charge does an electron have?
A. Neutral
B. Positive
C. Negative
D. None of these
16. Who invented the electric bulb?
A. James Watson
B. Noam Chomsky
C. Jane Goodall
D. Thomas Edison
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