Chemical communication is better than electrical impulse because of the following points: 1. Chemical communication takes place through hormones. So, co-ordination happens throughout the body. 2. In electrical impulses communication is limited. Here communication happens in regions connected by nerves.
As indicated by ohm's law, the current moving through a conductor is straightforwardly relative to the voltage applied across the conductor. V is proportional to I, in the following depicted diagram. <p><img alt="" src=" " /></p>
Given: Electric Current (I) = 0.35 A Potential Difference (V) = 1.4 V To Find: Resistance, R= ? Solution: We know that, Potential difference, V= I*R R = V/I ⇒R= 1.4/0.35 ∴R= 4 Ω Thus resistance od conductor is 4Ω
Charge (Q) = 96000 C Potential difference (V) = 40 V Time (t) = 2 hours = 2 ✕ 60 ✕ 60 seconds = 7200 s Electric current (I) = Q/t ……..(i) The following formula will be used for calculating the amount of heat generated (H): VIt ⇒ H = V ✕ It ⇒ H = V ✕ (Q/t ✕ t) [using equation (i) ] ⇒ H = V ✕ Q ⇒ H = 40 ✕ 96000 ∴ H = 384000 J The amount of heat generated while transferring 96000 coulomb of charge in two hours through a potential difference of 40 V is calculated as 3.84 ✕ 10⁶ J
Thermite process: Thermite is a pyrotechnic synthesis of metal powder and metal oxide. In the thermite process, Iron oxide responds with Aluminum to deliver liquid Iron. The thermite process is an exothermic response. Thermite is regularly utilized: To weld or slice through metal, and to filter the minerals of certain metals. Fe₂O₃ (s) + 2Al (s) → 2Fe(l) + Al₂O₃ + Heat
An electromagnet is a kind of magnet where the magnetic field is delivered by an electric flow. Electromagnets generally comprise of wire twisted into a curl. A current through the wire makes a magnetic field which is moved in debt, signifying the focal point of the curl. The magnetic field vanishes when the current is switched off. Electromagnets play a very important role in our day to day life. Uses of electromagents: 1. X-ray filter which is short for Magnetic Resonance Imaging is a gadget that utilizes electromagnets. 2. Electromagnets are likewise utilized in industry for getting and moving substantial iron articles. For example: scrap iron and steel.
Utilize iron nail (as transmitter), battery (for wellspring of current), and curl of wire(to stream the current). Wind the iron nail by the loop of wire. Stream this plan with current. This will create magnetic field and work as a magnet. <p><img alt="" src=" ” /></p>
