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</html>";s:4:"text";s:13549:"(CBSE (CCE) 2012) 7. One category differs from the other in terms of functions and response time to a peak of electricity. ANS:The heat produced in a conductor depends on the electric current and the resistance in it. 7, nor do they include the connector, fuse components, switch blades, or accessories listed in Table 2 on page 3; Tables 5, 6, and 7 on page 8; Table 14 on page 14; and Table 15 on page 15. False, since CFLs consume less electricity than electric bulb. Lighted electric bulb connected to the mains may be very hot and can burn our hand badly. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit.Its basic function is to interrupt current flow after a fault is detected. The cell which is used in a torch is called dry cell. Question 1. Class 7. Exe-2 Class-10. Electric power is the rate at which electrical energy is consumed is called electric power. c)Insulation of the wire must be checked periodically. In the case of flow of higher voltage than specified, fuse wire melts and protects the electric appliances. Class 7 Physics Electric Current and its Effects: ... A Fuse or a Circuit Breaker is a device which protects appliances from overcurrent or overload. So, fuse of proper rating must be used to avoid such damages. The kit features mini fuses rated for up to 32 VDC and includes a combination fuse tester and puller. Question 14: Explain the role of fuse in series with any electrical appliance in an electric circuit. There are many different types of hitches and hitch classes used for towing a trailer. Derive an expression for power in terms of current and resistance. a. Question 4. (c) An electric iron of 1 kW is operated at 220 V Find which of the following fuses that respectively rated at 1 A, 3 A and 5 A can be used in it. (a) What do you understand by the term electric fuse ? 7. room there should be a provision of one electric bulb, one electric fan, a refrigerator and a plug point for appliances of power up to 2 kilowatt. In the circuit, it is placed after the power source and before the appliance. Add your answer and earn points. It is a … Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the ‘OFF’ position, bulb, … VII. In a power system, circuit breaker and fuse perform the same switching (make and break the circuit) role by the manually and automatically at fault condition. a) A flow of charges or electrons through a conductor is called an electric current.The potential difference between the two ends makes the electric current flow through the wire.. b) Ampere is the unit of electric current. (CBSE 2014) Answer: Q-4 How does electric fuse protect circuit from overloading? Define the SI unit of current. Selina Concise Physics Class 7 ICSE Solutions – Electricity and Magnetism ... • Electric fuse is a device which limits the current in an electric circuit. 8. 34. A fuse is a protective device that keeps electrical appliances safe in the event of a surge of electrical current. Conventionally, in an electric circuit the direction of electric current is taken as opposite to the direction of the flow of electrons, which are negative charges. These fuses are widely used in automobiles and head units. An electric bell consists of a U-shaped soft iron core around which an insulated wire is wound to make it an electromagnet. 7. A fuse works on the heating effect of current. Electricity is an important source of energy in our day-to-day life. (1) 3. 2. Electric Bulb Depending on these features, you can divide them into time delay and fast acting fuses. We'll also look at some other hitch types, such as 5th wheel, gooseneck and pintle. Question 4. 8. Q-5 Explain the working principal of electric fuse… 1) In an in depth paragraph explain, what is a fuse? Explain the arrangement of cells in a battery. Answer: ... Fuse Wire : The fuse wire is connected in series, in an electric circuit. This is because its high resistance helps to … 6. The fuse wire should have high resistance and low melting point. Question: What is a miniature circuit breaker? An electric cell is a device which is used to generate electricity. ANS:The heat produced in a conductor depends on the electric current and the resistance in it. Electric Bell. Figure 7. On Diwali Mr.Antriksh wants to light his house with a number of 1 0 W (2 2 0 V) bulbs in parallel. The symbol of an electric … Used to protect circuit from high currents. The time delay test feature is optional. The fuse specification typically will include a life requirement at 100% of rating and maximum opening times at overload points (usually 135% and 200% of rating depending on fuse standard characteristics). Define electric power. Usually for data / address. unit is Ampere. (b) What do the following symbols mean in circuit diagram? Electric fuse has body made of ceramic and two points for attaching the fuse wire. This can sometimes lead to a fire. (b) … In the field of electrical engineering, a fuse is a service that delivers usable electrical circuit over-current safety. 4. If the house circuit has a fuse of 5 A then what is the maximum number of such bulbs he can use if he is not using any other electrical appliance in the circuit. An electric bulb draws a current of 8A and works on 250 volt on the average 8 hours a day find the power consumed by co. consumed by the bulb and find if the electric distribution company is the meaning Q8. » CBSE Class 7 Science Electric Current and Its Effects Worksheet Set A » View PDF CBSE Class 7 Science Electric Current and Its Effects Worksheet Set A Questions Very Short Answer Q1) Define … An electrical fuse is a low melting point copper or other metal wire that breaks due to heat caused by overvoltage or high load to avoid short circuit or failure to the device. 1. Greater than 2400V and less than 69kV. An electric iron consumes energy at a rate of 840 W when heating is at the maximum and 360 W when the heating is at the minimum. 7. Electric component Diagram Symbol 6) Wire 7) Fuse 8) Ammeter 9) Voltmeter SYMBOLS OF ELECTRIC COMPONENTS Friday, December 1, 2017 RAVI PRAKASH SINGH 4 5. Class X Chapter 8 ... Its S.I. … 10490 Fuse reducers for Class R fuses Equipment fuse clips Desired fuse (case) size Catalog no. Test , Class 10, Physics, CBSE- Magnetic Effects of Electric Current. FUSE: “Is a safety device that is used to limit the current in an electric circuit. One volt is defined as the "difference in electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points." The Fuse Carrier can be easily plugged in or removed from the Fuse Base without the risk of any electric shock. Class 10 Science MCQs Chapter 12 […] True 4. Class 00, 0, 2, 3 & 4 - 500v, 1000v, 17kv, 26.5kv, 36kv are used for domestic purpose. It occurs when a circuit is attempting to draw a greater electrical load than it is intended to carry. Electric bell: Rings when activated: Buzzer: Produce buzzing sound: Fuse: The fuse disconnects when current above threshold. Define "electrical current" ... • substance that does not readily allow the flow of electric current. Electric motor: Transformer: Change AC voltage from high to low or low to high. Class G fuses are current-limiting and are able to be so labeled per UL 248-5, which prescribes the maximum peak let-through and I2t let-through values permitted for this class of fuse. Overloaded Circuit . It has a wire of low resistance and low melting point. Magnitude of electric current in the wire is increased. Science for Tenth Class 10 / S Chand was published by Vishal Raj on 2020-06-20. ... Q31: When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. 8. And it is the load (or current)that creates the heat, plus the factors of ac vs. dc. Students can solve NCERT Class 10 Science Electricity Multiple Choice Questions with Answers to know their preparation level. Which materials are preferred for a fuse wire and why? State a difference between the wires used in an element of electric heater and in a fuse. Electricity of Class 10 Notes - Complete explanation and Notes of Class 10 Science chapter 1 ‘Electricity’.. Choose the correct answer out of the four available choices given under each question. In general this type of fuse will have an "AG" label of some kind, which originally stood for … Answer. What is the unit of power ? 3. Questions in 6 carry two marks each. Answer: Rubber, wood, plastic, glass. Begin by watching the video to the right as a class using the smartboard. (a) Name an instrument that measures electric current in a circuit. Under normal conditions, the fuse wire is a part of the circuitry, contributing to a complete loop for charges to flow through it. The answer is no. Question 2: Define the term electric potential. 4. alternatives Electric work is said to be done when a charge flows through a conductor at from MATHAMATIC MATHS6100 at Dav Sr. Public School [2] (b) What is meant by Global warming ? In electrical devices a glass fuse is often used. (See additional details on page 6). Explain the role of fuse in series with any electrical appliance in an electric circuit. Question 1. What will be the effect on a fuse wire connected in the circuit? Download electric current and its effects CBSE class 7 worksheets including questions based on latest syllabus including fill in the blanks, define, long questions and answers. Medium voltage level is defined by standard ANSI C84 as containing standard system voltages from 2400 through 69,000 V, and the high voltage level contains standard system voltages from 115 kV through 230 kV. *For current industry recommended values, refer to the latest revision of the National Electric Safety Code. may vary depend on the model version. (a) Define electric power. This is the explanation of the open and closed circuit with the block diagram. Check Pages 1 - 50 of Science for Tenth Class 10 / S Chand in the flip PDF version. Class Ten Science Current electricity short answers. Glass fusing is the joining together of pieces of glass at high temperature, usually in a kiln. Functions of fuses. Q.6. A cell or battery is a source of electric current. Best Answer. MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. Its essential component is a metal wire or strip that melts when too much current flows through it, thereby stopping or interrupting the current. Name few insulators. An electric fuse is a device that protects electric circuits from the dangers of overloading. Cable connectors not Question 1. Electric cell. The compass needle is displayed away from the wire. Electric fuse has a body made of ceramic and two points for connecting the wire. It consists of a piece of wire made of a metal or an alloy of appropriate melting point, i.e, aluminium, copper, iron, lead etc. Class 7 Science Electric Current and its Effects NCERT Textbook Questions and Answers Question 1. unit. In electric circuits this charge is often carried by moving electrons in a wire. ANS:Yes, this is a true statement. Note that most electric motors are designed to run at 50% to 100% of rated load and that maximum efficiency usually is near 75% of rated load. Page-165,166. Define fuse. Different Types of Fuses. Circuits are made up of wiring, a breaker (or a fuse, in old wiring systems), and devices (such as light fixtures, appliances, and anything plugged into an outlet). As it has high resistance and low melting point, when a large magnitude of electric current flows through the electric circuit, the fuse wire melts, thereby making the circuit open and preventing any damage to the electrical devices. 6. between the two terminals of a cell or battery along which an electric current flows, is called a circuit. OEL’s Industrial 100% Natural Rubber Insulating Gloves represent a major innovation in gloves for electrical protection. 6) What is difference between fixed and variable capacitor. Electric current, any movement of electric charge carriers such as electrons, protons, ions, or holes. Answer: An electric current is a flow of electric charge. Switch, Isolating. Electric Energy, Power and Household Circuits Goyal Brothers ICSE Physics Solutions Ch-9. In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. What do you meant by solenoid? Electric current = Charge/Time or I = Q/t Electric current is a scalar quantity. The NEC (National Electric Code) identification of Class 2 refers to the output voltage and power capabilities of ac-dc supplies, while the IEC (International Electrotechnical Commission) designator of protection, Class II, refers to a power supply’s internal construction and electrical insulation. The fuse wire melts whenever there is overload in the wiring. a 20 A SFE 20 fuse is 1 1 ⁄ 4 inch long (same as an AGC fuse of any rating), and; a 30 A SFE 30 fuse is 1 7 ⁄ 16 inches long. False, an electric fuse is used to prevent an electrical circuit from overloading and hence short circuit. - Define electric potential. Define electric potential. Page-165,166. 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