A resistor of resistance \(R\) is connected to an ideal battery. If the value of \(R\) is decreased, the power dissipated in the resistor will:
1. increase.
2. decrease.
3. remain unchanged.
4. Can't be determined.

Subtopic:  Heating Effects of Current |
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Two resistors \(R\) and \(2R\) are connected in series in an electric circuit. The thermal energy developed in \(R\) and \(2R\) are in the ratio of:
1. \(1:2\)
2. \(2:1\)
3. \(1:4\)
4. \(4:1\)

Subtopic:  Heating Effects of Current |
 79%
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Two resistances R and 2R are connected in parallel in an electric circuit. The thermal energy developed in R and 2R are in the ratio

1.   1 : 2

2.   2 : 1

3.   1 : 4

4.   4 : 1.

Subtopic:  Heating Effects of Current |
 75%
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Which of the following plots may represent the thermal energy produced in a resistor in a given time as a function of the electric current?

         

1. \(a\)
2. \(b\)
3. \(c\)
4. \(d\)

Subtopic:  Heating Effects of Current |
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A constant current i is passed through a resistor. Taking the temperature coefficient of resistance into account, indicate which of the plots shown in the figure, best represents the rate of production of thermal energy in the resistor

                      

1.  a

2.  b

3.  c

4.  d

Subtopic:  Heating Effects of Current |
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The heat developed in a system is proportional to the current through it.

1.  It cannot be Thomson heat.

2.  It cannot be Peltier heat.

3.  It cannot be Joule heat.

4.  It can be any of the three heats mentioned above.

Subtopic:  Heating Effects of Current |
From NCERT

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Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval,

(a) equal amounts of thermal energy must be produced in the resistors
(b) unequal amounts of thermal energy may be produced
(c) the temperature must rise equally in the resistors
(d) the temperature may rise equally in the resistors

Choose the correct option: 
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. (a), (d)

Subtopic:  Heating Effects of Current |
 78%
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