Electricity And Magnetism - Practice Test

[#296] If an iron on which 1,000 W is inscribed it run for 3 hours daily, then the total energy consumed by it in 30 days will be in kWh-

(A) 9000

(B) 900

(C) 90000

(D) 90

Correct Answer

(D) 90

[#297] What is the statement of Coulomb's law?

(A) The magnitude of the force of attraction (or repulsion) between two point charges is inversely proportional to the product of the magnitude of the two charges as well as the square of the distance between them

(B) The magnitude of the force of attraction (or repulsion) between two point charges is inversely proportional to the product of the two charges and is inversely proportional to the square of the distance between them

(C) The magnitude of the force of attraction (or repulsion) between two point charges is directly proportional to the product of the magnitude of two charges and inversely proportional to the square of the distance between them

(D) The magnitude of the force of attraction (or repulsion) between two point charges is directly proportional to the amount of the two charges, as well as the square of the distance between them

Correct Answer

(C) The magnitude of the force of attraction (or repulsion) between two point charges is directly proportional to the product of the magnitude of two charges and inversely proportional to the square of the distance between them

[#298] Three resistors 5 Ω, 6 Ω, 4 Ω are connected in series. The total resistance will be . . . . . . . .

(A) 10 Ω

(B) 15 Ω

(C) 10 Ω-m

(D) 15 Ω-m

Correct Answer

(B) 15 Ω

[#299] At which place earth's magnetic field becomes horizontal?

(A) Magnetic meridian

(B) Magnetic equator

(C) Geographical pole

(D) Tropic of cancer

Correct Answer

(B) Magnetic equator

[#300] If many bulbs are connected in parallel combination in a circuit and one bulb fuses, what will be happens with the other bulbs?

(A) All other bulbs stop glowing

(B) Some bulbs glow and some do not glows

(C) Some bulbs burst

(D) All other bulbs glowing

Correct Answer

(D) All other bulbs glowing

Electricity And Magnetism - Study Mode

[#296] If an iron on which 1,000 W is inscribed it run for 3 hours daily, then the total energy consumed by it in 30 days will be in kWh-

Correct Answer

[#297] What is the statement of Coulomb's law?

Correct Answer

[#298] Three resistors 5 Ω, 6 Ω, 4 Ω are connected in series. The total resistance will be . . . . . . . .

Correct Answer

[#299] At which place earth's magnetic field becomes horizontal?

Correct Answer

[#300] If many bulbs are connected in parallel combination in a circuit and one bulb fuses, what will be happens with the other bulbs?

Correct Answer