If 4 C of charge flows past a point in 2 s, what is the average current?
A) 8 A B) 0.5 A C) 2 A D) 4 V Answer: C Explanation: Current equals charge flow divided […]
Current Electricity, Physics
Current Electricity
Current Electricity, Physics
If a 12 V battery feeds three identical bulbs in series, what ideal voltage lies across each?
A) 3 V B) 6 V C) 12 V D) 4 V Answer: D Explanation: Identical series loads share the […]
Current Electricity, Physics
If the voltage is fixed and resistance doubles, what happens to current in an ohmic circuit?
A) It halves B) It doubles C) It quadruples D) It becomes zero always Answer: A Explanation: Ohm’s law is […]
Current Electricity, Physics
In a parallel circuit, what quantity is the same across each branch?
A) Branch current always B) Branch resistance always C) Potential difference D) Power always Answer: C Explanation: Each parallel branch […]
Current Electricity, Physics
In a simple series circuit, what is the current through each component?
A) Zero after the first component B) The same C) Greater in the last component D) Different solely by position […]
Current Electricity, Physics
In an ideal transformer, what does doubling secondary turns relative to primary turns do to voltage?
A) It halves secondary voltage B) It makes output DC C) It doubles secondary voltage D) It eliminates all current […]
Current Electricity, Physics
What current flows through a 4 Ω resistor connected to 12 V?
A) 0.33 A B) 4 A C) 3 A D) 48 A Answer: C Explanation: Ohm's law gives current as […]
Current Electricity, Physics
What does the frequency of an AC supply tell us?
A) The charge on one electron B) Number of complete electrical cycles per second C) The wire's length only D) […]
Current Electricity, Physics
What electrical quantity does a battery mainly provide between its terminals?
A) Fixed current independent of circuit B) Zero resistance C) Magnetic monopoles D) Potential difference Answer: D Explanation: A battery […]
Current Electricity, Physics
What happens to total circuit current when an additional parallel resistor is added to a fixed-voltage source?
A) It becomes zero B) It increases C) It always decreases D) It remains the same Answer: B Explanation: An […]