English

Name the following substance showing low resistivity.

Advertisements
Advertisements

Question

Name the following substance showing low resistivity.

One Word/Term Answer
Advertisements

Solution

Copper (a conductor)

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Electricity and Magnetism - Graded Assignment 4.1 [Page 236]

APPEARS IN

Frank Physics Part 2 [English] Class 10 ICSE
Chapter 4 Electricity and Magnetism
Graded Assignment 4.1 | Q 19. (i) | Page 236

RELATED QUESTIONS

Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?


An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:

(a) 0.92 A
(b) 2.9 A
(c) 9.2 A
(d) 92 A

 


Give the law of combination of resistances in series.


A p.d. of 4 V is applied to two resistors of 6 Ω and 2 Ω connected in series. Calculate:

(a) the combined resistance
(b) the current flowing
(c) the p.d. across the 6 Ω resistor


If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combination is : 

(a) 0.1 Ω
(b) 10 Ω
(c) 20 Ω
(d)40 Ω


The diagram below shows part of a circuit: 

 

If this arrangement of three resistors was to be replaced by a single resistor, its resistance should be:
 
(a) 9 Ω
(b) 4 Ω
(c) 6 Ω
(d) 18 Ω


State how are the two resistors joined with a battery when same current flows in each resistor.


What do you mean by a rheostat?

The potential difference between the terminals of an electric iron is 240 V and the current flowing through it is 6 A. What is the resistance of the electric iron?

In an electrical circuit, two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×