मराठी

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

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
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Electricity - Exercise 8 [पृष्ठ २५८]

APPEARS IN

लखमीर सिंह Physics Part 1 [English] Class 10
पाठ 4 Electricity
Exercise 8 | Q 11. | पृष्ठ २५८

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

What does an electric circuit mean?


Three 2 V cells are connected in series and used as a battery in a circuit.

  1. What is the p.d. at the terminals of the battery?
  2. How many joules of electrical energy does 1 C gain on passing through
    1. one cell
    2. all three cells?

How many microamperes are there in 1 ampere?


If 20 C of charge pass a point in a circuit in 1 s, what current is flowing?


The p.d. across a 3 Ω resistor is 6 V. The current flowing in the resistor will be:

(a) `1/2A`
(b) 1 A
(c) 2 A
(d) 6 A


Calculate the effective resistance between the points A and B in the network shown below in Figure 8.45   


The work done in moving unit positive charge across two points in an electric circuit is a measure of
           


An electric bulb is rated at 220 V, 100 W. What is its resistance? What maximum current can be passed through it?

What do you mean by watt-hour?

What do you mean by a solenoid?

Tick(✓) the correct choice in the following:

The outer casing of an electric iron is generally connected to earth in order
to


The circuit diagram (Fig.) shows a battery of e.m.f. 6 volts and internal
resistance of 0.8 Ω oonnected in series. Find the
(a) Current reoorded by the ammeter,
(b) P.d. across the terminals of the resistor B,
( c) Current passing through each of the resistors B, C and D, and
( d) P.d. across the terminals of the battery.


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 ........

In fig. XY is at right angles to the magnetic field. The direction in which XY should be moved to induce an electron flow in the direction Y to X as indicated by the arrow is:


Electrical power P is given by the expression P = (Q × V) ÷ time

(a) What do the symbols Q and V represent?

(b) Express the power P in terms of current and resistance explaining the meanings of symbols used there in.


Study the following circuit and find out:
      (i) Current in 12 Ω resistor.
      (ii) The difference in the readings of A1 and A2, if any.


In current electricity, a positive charge refers to ______.


The power of an electric device is a product of ______ and ______.


A current of 2A passing through the conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is ______.


Electric current passes through a metallic conductor due to the movement of ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×