If the same potential difference is applied between the two ends of iron and copper wires having the same length and cross section, does equal amount of current flow through the two wires?
WBBSE
Class X
Physical Science
Current Electricity
01 Mark
2023
No. For the same potential difference (V), length (L), and cross-section (A), the current depends on resistivity (ρ)
Related Questions
More WBBSE Moderate level questions
1/12
Q.
If a current of 0.2 ampere flows through a conductor of resistance 40 ohm, what...
A.
d. 8 volts Explanation: Current (I) = 0.2 A Resistence (R) =...
Q.
What is the importance of insulators in household wiring?
A.
Importance of Insulators in Household Wiring: Safety: Prevents electric shock. Prevents Short...
Q.
Write Faraday’s laws of electromagnetic induction. Mention one advantage of using a LED lamp over...
A.
Faraday's law of electromagnetic induction: Whenever there is a change in magnetic...
Q.
Write one characteristic of each of electrical heater wire and fuse wire.
A.
Electrical Heater Wire: Has a high resistance and High Melting Point. Fuse...
Q.
If 12 C of charge flows through a conductor for 2 minutes, the electric current...
A.
(b) 0.1 amperes Explanation: Q = 12 C (charge) t = 2...
Q.
What is DC?
A.
DC (Direct Current) is a type of electric current that flows in...
Q.
Two metallic wires A and B of the same length are made of the same...
A.
R = ρ or,R = ρ ⇒ R ∝ ⇒ = Given:...
Q.
By which rule is the direction of rotation of Barlow’s wheel determined?
A.
The direction of rotation of Barlow's wheel is determined by Fleming's Left-Hand...
Q.
What would be the equivalent resistance of a circuit containing resistances of 6 Ω and...
A.
First, calculate the equivalent resistance of the two resistors in parallel (6...
Q.
Match the Right column with the Left column
A.
2.11.1 Acetic acid → (b) Weak electrolyte 2.11.2 Glass → (a) non-conductor...
Q.
‘Kilowatt-hour’ is the unit of which physical quantity?
A.
'Kilowatt-hour' is the unit of energy.
Q.
What is the unit of electrical conductance?
A.
The unit of electrical conductance is the Siemens (S). OR Fuse wire...