EASY
10th West Bengal Board
IMPORTANT
Earn 100

State three differences between emf and terminal voltage of a cell.

Important Questions on Current Electricity

MEDIUM
10th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 6 - Current Electricity>EXERCISE>Q 2
Two bulbs rated as 60 W and 100 W are connected in series and parallel with same line voltage. In the two cases, which bulb glows more brightly than the other? Explain your answer.
EASY
10th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 6 - Current Electricity>EXERCISE>Q 3
State Lenz's law. How can Lenz's law be explained as a consequence of energy?
EASY
10th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 6 - Current Electricity>EXERCISE>Q 4
Write three important differences between AC generator and DC motor.
EASY
10th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 6 - Current Electricity>EXERCISE>Q 1
90 J of work is done in flowing 6 C of positive charge between two points in an electric field. Find the potential difference between the two points.
EASY
10th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 6 - Current Electricity>EXERCISE>Q 2
0.4 A current flows through a bulb. If the bulb glows for three hours, how much electric charge is spent?
EASY
10th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 6 - Current Electricity>EXERCISE>Q 3
Calculate the heat given out by a filament of the bulb in 20 sec, when its resistance is 4 Ω and the potential difference across its ends is 12 V.
EASY
10th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 6 - Current Electricity>EXERCISE>Q 4
A family uses one 100 W bulb, one 100 W fan and a 1000 W heater for 8 hours daily. Calculate the daily household bill, if one unit costs Rs. 3.