KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 125 - 127 of 268

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 268 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

Question number: 125

» Current Electricity » V-I Characteristics of Ohmic and Non-Ohmic Conductors

Appeared in Year: 2015

MCQ▾

Question

For a diode connected in parallel with a resistor, which is the most likely current (I) – voltage (V) characteristic?

 Circuit diagram consist of a diode and a resistor

Circuit Diagram Consist of a Diode and a Resistor

In figure circuit diagram is shown, in which; a resistor connected in parallel to a diode.

Choices

Choice (4) Response

a.

Current (I) vs Voltage (V) characteristic (Choice A)

Current (I) vs Voltage (V) Characteristic (Choice A)

In figure current (I) vs Voltage (V) characteristic of given figure is shown.

b.

 Current (I) vs Voltage (V) characteristic (Choice B)

Current (I) vs Voltage (V) Characteristic (Choice B)

In figure current (I) vs Voltage (V) characteristic of given figure is shown.

c.

 Current (I) vs Voltage (V) characteristic (Choice C)

Current (I) vs Voltage (V) Characteristic (Choice C)

In figure current (I) vs Voltage (V) characteristic of given figure is shown.

d.

Current (I) vs Voltage (V) characteristic (Choice D)

Current (I) vs Voltage (V) Characteristic (Choice D)

In figure current (I) vs Voltage (V) characteristic of given figure is shown.

Question number: 126

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

Question

A long horizontal fixed wire carries a current of 15 A. A fine thin wire carrying a current 15 A and weighing 0.05 N/m is directly over it and parallel to it. The distance at which the second wire is just supported by the magnetic repulsion is –

Choices

Choice (4) Response

a.

9 m

b.

c.

d.

0.9 mm

Question number: 127

» Thermodynamics » Carnot Engine and Its Efficiency

MCQ▾

Question

A reversible engine converts of the heat input into work. When the temperature of the sink is reduced by 750 C, the efficiency of the engine is doubled. The temperatures in degree centigrade of the source and the sink are –

Choices

Choice (4) Response

a.

102,27

b.

95,27

c.

100,27

d.

112,27

f Page
Sign In