MEDIUM
10th Kerala Board
IMPORTANT
Earn 100

Nichrome is not used as filament in incandescent lamps. Why?

Important Questions on Effects of Electric Current

MEDIUM
10th Kerala Board
IMPORTANT
Physics Standard X Part 1>Chapter 1 - Effects of Electric Current>Exercise 8>Q i
What are the advantages of using discharge lamps instead of incandescent lamps?
MEDIUM
10th Kerala Board
IMPORTANT
Physics Standard X Part 1>Chapter 1 - Effects of Electric Current>Let us assess>Q 1
Fuse wire is to be used by understanding the amperage correctly. Write down the amperage of the fuse wires that are currently available in the market.
HARD
10th Kerala Board
IMPORTANT
Physics Standard X Part 1>Chapter 1 - Effects of Electric Current>Let us assess>Q 3
According to Joule’s Law the heat generated due to the flow of current is H=I2Rt. Will the heat developed increase on increasing the resistance without changing the voltage? Explain.
HARD
10th Kerala Board
IMPORTANT
Physics Standard X Part 1>Chapter 1 - Effects of Electric Current>Let us assess>Q 5

Complete the table based on the amperage of the fuse wire.

Electrical device Operating voltage (V). Power of the device(P). Current through the circuit, (I). The amperage of the fuse to be used in the circuit (A).
Water heater 230 V 4370 W 19 A 20 A
Air conditioner(AC) 230 V _____ 14.5 A _____
Television(LED-TV) 230 V 57.5 W _____ _____
Computer(Laptop) 230 V _____ 0.125 A _____
MEDIUM
10th Kerala Board
IMPORTANT
Physics Standard X Part 1>Chapter 1 - Effects of Electric Current>Let us assess>Q 5
The amperage of the fuse wire used in a circuit that works on 230 V is 2.2 A. If so the power of the device is
MEDIUM
10th Kerala Board
IMPORTANT
Physics Standard X Part 1>Chapter 1 - Effects of Electric Current>Let us assess>Q 7
An electric heater conducts 4 A current when 60 V is applied across its terminals. What will be the current(in A) if the potential difference is 120 V?
HARD
10th Kerala Board
IMPORTANT
Physics Standard X Part 1>Chapter 1 - Effects of Electric Current>Let us assess>Q 9
A girl has many resistors of 2 Ω each. She needs a circuit of 9 Ω resistance. For this draw a circuit with the minimum number of resistors.
MEDIUM
10th Kerala Board
IMPORTANT
Physics Standard X Part 1>Chapter 1 - Effects of Electric Current>Let us assess>Q 10

Question Image

If a bulb is lit after rejoining the parts of a broken filament, what change will occur in the intensity of the light from the lamp? What will be the change in the power of the bulb?