EASY
12th Meghalaya Board
IMPORTANT
Earn 100

Define drift velocity.

Important Questions on Current Electricity

MEDIUM
12th Meghalaya Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 2

Prove that the current density of a metallic conductor is directly proportional to the drift speed of electrons.

MEDIUM
12th Meghalaya Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 5

Figure shows 5 DC sources (cells). These emfs are shown in the figure. Find emf of the battery AB.

Question Image

EASY
12th Meghalaya Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 6
What is the relationship between potential difference across the terminals of a cell and emf of the cell in an open circuit?
EASY
12th Meghalaya Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 7
A 25W and a 100W bulb are joined in series and connected to the mains. Which bulb will glow brighter?
EASY
12th Meghalaya Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 8
Show graphically how electrical resistance of a piece of Silicon or Germanium varies when its temperature is varied.  
MEDIUM
12th Meghalaya Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 9
A metallic wire has a resistance of 3.0 Ω at 0°C and 4.8 Ω at  1500 C. Find the temperature coefficient of resistance of its material. 
EASY
12th Meghalaya Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Solved Physics Paper-1>Exercise>Q 11

Twelve resistors each of resistance r are joined to form a cube as shown in the figure given below. Find the equivalent resistance between the diagonally opposite points A and F.

Question Image

EASY
12th Meghalaya Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Solved Physics Paper-2>Exercise>Q 11
A 10Ω resistor and a 20Ω resistor are connected in parallel. The combination is connected to a 5.5V cell in one side and a 30Ω rheostat in another side. The sliding contact of rheostat is connected to the other terminal of the battery through an ammeter. Find the maximum and minimum value of current in the circuit. Neglect the internal resistance of the cell.