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Key learning points. Electric charge, Q, is measured in coulombs (C). Electric current is a measure of the rate of flow of electric charge, calculated using: I = Q ÷ t. Potential difference is a measure of the energy transferred by each coulomb of charge, calculated using: V = E ÷ Q.
Electric Charge Calculations. Electric charge is a property of matter where it experiences a force when in an electromagnetic field. The idea behind it is: Fundamental particles can have 0, +1 or −1 electric charge: + and − are pulled towards each other. + pushes + away. − pushes − away.
1. If there is a current of 10 amperes in a circuit for 10 minutes, what quantity of electric charge flows in through the circuit? 2. How much current must there be in a circuit if 100 coulombs flow past a point in the circuit in 4 seconds? 3. How much time is required for 10 coulombs of charge to flow past a point if the rate of flow
WORKSHEET- ELECTRIC CHARGE AND FIELD A. ELECTRIC CHARGE (1 Mark Questions) 1. If a body contains n 1 electrons and n 2 protons then what is the total charge on the body? Sol + qQ = q 1 2 +.... + q n. (Additive property of charge) Q = (n 2 – n 1)e 2. What is the total positive or negative charge present in 1 molecule of water? Sol. H 2
Electrical Current, Charge and Potential Worksheet. 1. Calculate the unknown quantity. (a) I = 0.4 A, t = 20 s. Q = ? (b) Q = 240 C, t = 300 s, I = ? (c) I = 2 A, Q = 400 C, t=? (d) Q = 140 C, t = 4 minutes, I = ? (e) I = 0.3 A, t = 1.5 hours, Q = ? 2. A current of 1.5 A flows through a lightbulb for 10 minutes.
Electrical charge is measured in Coulombs \text{(C)} and current is measured in amperes \text{(A)}. The current can be thought of as the rate of flow of charge around the circuit. You can measure current using an ammeter .
The three basic principles for this tutorial can be explained using electrons, or more specifically, the charge they create: Voltage is the difference in charge between two points. Current is the rate at which charge is flowing. Resistance is a material's tendency to resist the flow of charge (current).
