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A current of 1.5 A flows through a lightbulb for 10 minutes. (a) How much charge flowed through the lightbulb? (b) How many charges flowed through the lightbulb?
WORD PROBLEMS. 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.
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.
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. You can calculate the charge that has flown around a circuit in a certain time \text{(s)} using the following equation:
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.
Worksheet - Coulomb’s Law 1. A negative charge of - 2.0 C and a positive charge of 3.0 C are separated by 80 m. What is the force between the two charges? 2. A negative charge of - 0.0005 C exerts an attractive force of 9.0 N on a second charge that is 10 m away. What is the magnitude of the second charge? 3.
Q1 Write down the SI units for electric charge, current, potential, energy and power. Q2 2.00 ×10 16 electrons pass through a point in a circuit in 0.25 s. Calculate the electric current through the point. Q3 Calculate the potential energy of an electron at a point where the electric potential is 6.0 volts.
