हिंदी

State Three Factors on Which the Heat Produced by an Electric Current Depends. How Does It Depend on These Factors? - Science

Advertisements
Advertisements

प्रश्न

State three factors on which the heat produced by an electric current depends. How does it depend on these factors? 

Advertisements

उत्तर

The heat produced by an electric current depends on the square of the current, the resistance of the device and the time for which the current is passed through the device, i.e.:
H = I2Rt

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 1: Electricity - Exercise 8

APPEARS IN

लखमीर सिंग Physics (Science) [English] Class 10
अध्याय 1 Electricity
Exercise 8 | Q 11

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

Which particles constitute the electric current in a metallic conductor?


Which unit could be used to measure current?

(a) Watt
(b) Coulomb
(c) Volt
(d) Ampere


The circuit diagram given below shows the combination of three resistors R1, R2 and R3

  

Find :
(i) total resistance of the circuit.
(ii) total current flowing in the circuit.
(iii) the potential difference across R1.

 

 


V1, V2 and V3 are the p.ds. across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5 A.  

Which one of the columns (a) to (d) shows the correct values of V1, V2 and V3measured in volts? 

           `V_1`   `V_2`  `V_3` 

(a)         1.0       2.0        3.0                    

(b)         5.0       10.0      15.0

(c)         5.0       2.5        1.6                 

(d)         4.0       4.0        2.0 


Which is the better way to connect lights and other electrical appliances in domestic wiring: series circuits or parallel circuits? why?


How does the heat H produced by a current passing through a fixed resistance wire depend on magnitude of current I?


A wire of uniform thickness with a resistance of 27Ω is cut into three equal pieces and they are joined in parallel. Find the equivalent resistance of the parallel combination. 


What happens to the resistance if the conductor is made thinner?

How many electrons are present in 1 C?

Explain the meaning of the statement 'the current rating of a fuse is 5 A'.

A 720 W heater operates from a 220 V line voltage. Calculate:
(a) The electrical energy consumed by the heater in 3 h.
(b) The cost of electrical energy consumption at the rate of 60 paise per kWh.


Complete the following sentence:

Fuse wire has a ............ Melting point and it is made of an alloy of ......... and if the current in a circuit rises too high, the fuse wire ...........


A charge of 80 C flows in a conductor for 2 minutes.
(a) Calculate the current flowing through the conductor.
(b) If the current through a heater is 4 A what charge must be passing in 8 seconds?


Complete the following table. The first answer has been given as an example

Quantity Unit

(a) Electrical potential Volt

( b) Resistance

( c) Power

( d) Energy

( e) Resistivity

Volt

........

..........

............

..............


What is the purpose of fuse in an electrical circuit?


Tick (✓) the correct choice among the following :

There are 500 turns and 2000 turns in the primary and secondary coil of a
transformer respectively. If th e output voltage is 1000 V, how large is the
input voltage?


State the condition when it is advantageous to connect cells in parallel.


In current electricity, a positive charge refers to ______.


Conventionally, the direction of the current is taken as:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×