Current Electricity Exe-9A Numericals Concise Physics ICSE Class 9 Selina Publishers There is the solutions of Numericals Questions of your latest textbook which is applicable in 2024-25 academic session. Visit official Website CISCE for detail information about ICSE Board Class-9 current electricity class 9 numericals.
Current Electricity Exe-9A Numericals
Concise Physics ICSE Class 9 Selina Publishers
| Board | ICSE |
| Class | 9 |
| Subject | Physics |
| Writer / Publication | Concise selina Publishers |
| Chapter-9 | Current Electricity |
| Exe-9A | Electric Current |
| Topics | Solution of Exe-9(A) Numericals |
| Academic Session | 2024-2025 |
Exercise- 9A Electric Current
Current Electricity Numericals Physics Class-9 ICSE Selina Publishers
Page – 215
NUMERICALS:
Question-1 A charge 0.5 C passes through a cross section of a conductor in 5 s. Find the current.
Answer-1 When considering a flow of electric charges, the quantity of charge which passes is given by:
Quantity of charge=Rate of flow of charge×time,i.e. Q=It
Hence, current is given as:
I = Q/t = 0.5/5 = 0.1 A.
Question-2 A current of 1.5 A flows through a conductor for 2.0 s. What amount of charge passes through the conductor?
Answer-2 given, current= 1.5A, time= 2.0 s
we know that,
Charge (q) = Current (I) x time (t)
q = 1.5 x 2
q = 3 C.
Question-3 When starter motor of a car is switched on for 0.8 s, a charge 24 C passes through the coil of the motor. Calculate the current in the coil.
Answer-3 When considering a flow of electric charges, the quantity of charge which passes is given by:
Quantity of charge=Rate of flow of charge × time, i.e. Q=It
Hence, current is given as:
I = Q/t = 24/0.8 = 30A.
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