Current Electricity (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SBSX (Class 12 & 1st Year B.Sc.) Physics): Questions 1  4 of 9
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Question number: 1
» Current Electricity » Electrical Energy and Power
Appeared in Year: 2011
Question
In the circuit shown below the resistances are given in ohms and the battery is assumed ideal with emf equal to 3.0 volts. The resistor that dissipates the most power is
Choices
Choice (4)  Response  

a.  R_{1} 

b.  R_{2} 

c.  R_{4} 

d.  R_{3} 

Question number: 2
» Current Electricity » Series and Parallel Combinations of Resistors
Appeared in Year: 2011
Question
Two batteries V_{1} and V_{2} are connected to three resistors as shown below.
If and the current. If and, the current Now, if and, the current will be –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 3
» Current Electricity » Electrical Resistance
Appeared in Year: 2011
Question
The Quantum Hall Resistance R_{H} is a fundamental constant with dimensions of resistance. If h is Planck’s constant and e the electron charge, then the dimension of R_{H} is the same as 
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 4
» Current Electricity » Temperature Dependence of Resistance
Appeared in Year: 2012
Question
A steady current Ι flows through a wire of radius r, length L and resistivity ρ. The current produces heat in the wire. The rate of heat loss in a wire is proportional its surface area. The steady temperature of the wire is independent of
Choices
Choice (4)  Response  

a.  L 

b.  r 

c.  I 

d.  p 
