A 10 V supply charges a capacitor through a 2 kilohm resistor, with F. What is the capacitor voltage after 1.0 s?
Answer and explanation
Correct answer: A. 6.3 V, after one time constant of charging
- Step 1: The time constant is s. Step 2. V. Answer: 6.3 V. Why not the others: 10 V is the final voltage after many time constants; 3.7 V is , the discharge value; 5.0 V assumes half.
Practise more Electricity, Magnetism, Optics and Modern Physics.
Free questions with an explanation for every one, and full timed Wazari Exam (Iraq Baccalaureate) - Scientific Branch mock tests.
More Electricity, Magnetism, Optics and Modern Physics questions
- A 12 V battery is connected across a 4 ohm resistor. What current flows?
- A 6 ohm and a 3 ohm resistor are connected in parallel. What is their combined resistance?
- A current of 2 A flows through a 5 ohm resistor. What power is dissipated?
- A 10 microfarad capacitor is charged to 100 V. How much energy does it store?
- Point charges of 2 microcoulomb and 3 microcoulomb are 0.3 m apart in air. What is the magnitude of the force between them? (…
- A straight wire 0.2 m long carries 4 A at right angles to a uniform field of 0.5 T. What is the force on the wire?