Solution: Schematic diagram showing common domestic circuits The Importance of the Fuse A fuse is a type of safety device that is used in both household wiring and electrical appliance design.The...
Solution: It is stated in Faraday's law of electromagnetic induction that whenever a conductor moves in an electromagnetic field, an electromagnetic field is induced across the conductor. If a close...
Solution: The experimental diagram of circuit is: Electromagnetic induction is a phenomenon that occurs when a magnetic field is changed in a closed circuit, resulting in the generation of an...
Solution: The schematic diagram of the simple electric motor is: A BCD coil is a coil that is placed between the two poles of a permanent magnet to create a magnetic field. The coil is positioned in...
Answer: Take a small aluminium rod (AB) and bend it in half (of about 5 cm). As shown in Fig. 1, you can suspend it horizontally from a stand by using two connecting wires. A strong horseshoe magnet...
Answer: Even in a current-carrying loop, the right-hand thumb rule is observed and followed. This demonstrates that magnetic field lines are present all around the conducting wire. However, because...
Answer: A straight conductor carrying current is held in the right hand with the thumb pointing in the direction of the current, according to the right-hand thumb rule. The fingers of the right hand...
Answer:Current carrying loops act as bar magnets with associated lines of the field, which are represented by the arrows. As a result, the existing earth's magnetic field is altered, resulting in a...
Answer: An electrical fuse is composed of a thin wire of short length that is composed of tin and lead in the proportion of 75:25 percent. When the current exceeds the specified limit, the fuse...
Answer: The direction of current in an alternating current will change constantly, whereas the direction of current in a direct current will not change. In India, the air conditioner changes...
Answer: In order to power the motor, the two conducting stationary brushes must make contact with the outer sides of the two halves of the split rings, which are both insulated and attached to the...
Answer: Fans, mixers, washing machines, and computers are just a few examples of devices in which an electric motor, a rotating device that converts electrical energy to mechanical energy, plays a...
Answer: In a current-carrying straight solenoid, the divergence of magnetic field lines near the ends indicates a decrease in the strength of the magnetic field near and beyond the ends of the...
Answer: The magnetic field strength decreases as the distance between the two points decreases. It is indicated by a decrease in the degree of closeness of the lines of field in the image.
Answer: In the right-hand rule, the thumb held by curled fingers indicates the direction of current, whereas in Fleming's left-hand rule, the force experienced by a current-carrying conductor placed...
Solution: i) Due to the fact that they are positively charged, alpha particles serve to generate current in the direction of motion. ii) Because neutrons do not have any charge on them, they do not...
Answer: As the deflection increases, so does the deflection. The strength of the magnetic field will be directly proportional to the amount of current that passes through the straight conductor, as...
Solution: P puts you into the plane of paper, and Q takes you out of it. The strength of the magnetic field is greater at the point that is closer to the source, which is Q.
Solution: It is necessary to meet the following conditions in order to obtain a permanent electromagnet from a current-carrying solenoid. Soft iron is used in a closed-circuit core.
Answer: In the plane of the paper itself, to be precise. The axis of the compass is vertical, and the magnetic field produced by the conductor is vertical as well. Because of this, it is not...
Solution: Answer is (b) use of fuse An electrical fuse is composed of a thin wire of short length that is composed of tin and lead in the proportion of 75:25 percent. When the current exceeds the...
Solution: Answer is (a) split-ring type commutator must be used After each half-turn of the armature, a split-ring type commutator reverses the direction of the current flowing through it. This...
Solution: Answer is (c) same at all points Magnetic field lines are parallel inside the solenoid. This indicates the existence of a strong magnetic field. As a result, the magnetic field is uniform...
Solution: The answer is (b) directly below the wire We can determine the direction of the magnetic field beneath the wire by applying the right-hand thumb rule.
Solution: The answer is (d) In India, the AC changes direction after every 1/50 second In India, the alternating current frequency is 50 Hz. Each cycle, the direction changes twice, so that the...
Solution: The answer is (d) there are momentary galvanometer deflections that die out shortly; the deflections are in opposite directions When the key is plugged in, the galvanometer shows...
Solution: Answer is (c) a permanent magnet to rotate the armature Electromagnets are used in place of permanent magnets in electric motors.
Solution: Answer is (a) forces both pointing into the plane of the paper Explanation: The direction of an electron's motion is the polar opposite of the direction of an electric current. This will...
Solution: Answer is (c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet Because the solenoid behaves similarly...
Solution: Answer is (c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet Explanation: Due to the fact that a...
Solution: Answer is (a) A Explanation: The magnetic field will be directed from the south pole to the north pole. As a result of field lines pointing from point B to point A, point A is displaying...
In the case of open magnetic field lines drawn over the horizontal plane ABCD, the magnetic field lines will take the shape of concentric circles, with the centre of each circle located at the axis...
Answer is (c) If magnetic field lines are parallel and equidistant, they represent zero-field strength Explanation: Due to the fact that parallel lines of magnetism represent a homogenous magnetic...