Current Electricity
ICSE · Class 10 · Physics
Flashcards for Current Electricity — ICSE Class 10 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.
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Get startedState the definition of electric current and write its formula.
Answer
Electric current is the rate of flow of charge. Formula: i=Q/t Here, i = current, Q = charge, t = time. Unit: ampere (A) 1 ampere means 1 coulomb of charge flows in 1 second.
A charge of 10 C flows through a conductor in 5 s. Find the current.
Answer
Given: Q = 10 C, t = 5 s Formula: i=Q/t Step 1: i = 10 C / 5 s Step 2: i = 2 C/s Answer: i = 2 A…
What is the current when 1 coulomb of charge passes in 1 second?
Answer
Formula: i=Q/t Given: Q = 1 C, t = 1 s So, i = 1 C / 1 s = 1 A Answer: 1 ampere.
State the relation between current and number of electrons.
Answer
If n electrons flow in time t, then: Q=ne and i=ne/t Here, e is the charge of one electron. This relation connects microscopic charge carriers with electric current.
How many electrons pass when 1 A current flows for 1 s?
Answer
Given: i = 1 A, t = 1 s Formula: i=ne/t So, Q = it = 1 A × 1 s = 1 C For 1 A and 1 s, number of electrons n = 6.25×10^18 Answer: 6.25×10^18 electrons…
Why does electric current flow more easily in metals?
Answer
Metals have many free electrons. These electrons move through the conductor and produce current. Because of the large number of free electrons, metals are good conductors of electricity.
State the direction of conventional current and electron flow.
Answer
Conventional current flows from higher potential to lower potential. Electron flow is opposite: from lower potential to higher potential, that is, from the negative terminal to the positive terminal t…
A student says current and electron flow are in the same direction. Is this correct?
Answer
No. Conventional current is opposite to electron flow. Electrons move from the negative terminal to the positive terminal through the resistor, while conventional current is taken from higher potentia…
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