
When the starter motor of a car is switched on for 0.8s, 24C of charge passes through the coil of the motor. The current (A) in the coil is
A. 30
B. 10
C. 25
D. 32
Answer
484.5k+ views
Hint: In order to solve this question, we have to use the current formula directly and we know that current is the charges flowing per unit time. Dividing the charge and time we can find the current flowing through the coil.
Step by step answer: Charge quantization is the principle that the charge of any object is an integer multiple of the elementary charge. Also we know that current is the charges flowing per unit time. Hence the current formula.
Given: Charge (Q) =24C
Time=0.8s
so to get the answer by using the formula is $\dfrac{Q}{t}$
so,
we have the current formula
I=$\dfrac{Q}{t}$
I= 24/0.8
$\Rightarrow$ I =30A
Therefore, the current in the coil is 30A.
Hence the correct option is A
Note: Students must not get confused with the formula of Q=ne but this formula we are using for calculating the number of electrons and charge. Hence we use the current formula. The quantization of an object's charge can be exactly 0 e, or exactly 1 e, −1 e, 2 e, etc., but not, say or −3.
Step by step answer: Charge quantization is the principle that the charge of any object is an integer multiple of the elementary charge. Also we know that current is the charges flowing per unit time. Hence the current formula.
Given: Charge (Q) =24C
Time=0.8s
so to get the answer by using the formula is $\dfrac{Q}{t}$
so,
we have the current formula
I=$\dfrac{Q}{t}$
I= 24/0.8
$\Rightarrow$ I =30A
Therefore, the current in the coil is 30A.
Hence the correct option is A
Note: Students must not get confused with the formula of Q=ne but this formula we are using for calculating the number of electrons and charge. Hence we use the current formula. The quantization of an object's charge can be exactly 0 e, or exactly 1 e, −1 e, 2 e, etc., but not, say or −3.
Recently Updated Pages
Master Class 10 General Knowledge: Engaging Questions & Answers for Success

Master Class 10 Computer Science: Engaging Questions & Answers for Success

Master Class 10 Science: Engaging Questions & Answers for Success

Master Class 10 Social Science: Engaging Questions & Answers for Success

Master Class 10 Maths: Engaging Questions & Answers for Success

Master Class 10 English: Engaging Questions & Answers for Success

Trending doubts
A number is chosen from 1 to 20 Find the probabili-class-10-maths-CBSE

Find the area of the minor segment of a circle of radius class 10 maths CBSE

Distinguish between the reserved forests and protected class 10 biology CBSE

A boat goes 24 km upstream and 28 km downstream in class 10 maths CBSE

A gulab jamun contains sugar syrup up to about 30 of class 10 maths CBSE

Leap year has days A 365 B 366 C 367 D 368 class 10 maths CBSE
