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General
Easy
Question
If V1> V2 ,r is resistance offered by diode in forward bias then current through the diode is
- 0
- None
The correct answer is:
Related Questions to study
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Two similar p-n junctions can be connected in three different ways as shown in the figures. The two connections across which the potential difference is same are
a) 
b) 
c) 
Two similar p-n junctions can be connected in three different ways as shown in the figures. The two connections across which the potential difference is same are
a)
b)
c)
physics-General
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In the following , reverse biased diode is
In the following , reverse biased diode is
Physics-General
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The P.V. diagram of a certain process (Carnot cycle) is as shown in the figure.
The process is represented as
The P.V. diagram of a certain process (Carnot cycle) is as shown in the figure.
The process is represented as
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The following graphs shows two isotherms for a fixed mass of an ideal gas. The ratio of r.m.s. speed of the molecules at temperatures T1 and T2 is
The following graphs shows two isotherms for a fixed mass of an ideal gas. The ratio of r.m.s. speed of the molecules at temperatures T1 and T2 is
physics-General
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A volume V-temperature T diagram was obtained when a given mass of gas was heated. During the heating process from state 1 to state 2, the pressure :
A volume V-temperature T diagram was obtained when a given mass of gas was heated. During the heating process from state 1 to state 2, the pressure :
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Two identical glass spheres filled with air are connected by a thin horizontal glass tube. The glass tube contains a pellet of mercury at its mid-point. Air in one sphere is at 0°C and the other is at 20°C. If temperature of both the vessels are increased by 10°C, then neglecting the expansions of the bulbs and the tube
Two identical glass spheres filled with air are connected by a thin horizontal glass tube. The glass tube contains a pellet of mercury at its mid-point. Air in one sphere is at 0°C and the other is at 20°C. If temperature of both the vessels are increased by 10°C, then neglecting the expansions of the bulbs and the tube
Physics-General
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There are two identical vessels containing same quantity of an ideal gas at same pressure. Vessel A is placed in a train moving with constant speed and the vessel B is placed on the platform. In the frame of an observer standing on the plateform, select the correct statement
There are two identical vessels containing same quantity of an ideal gas at same pressure. Vessel A is placed in a train moving with constant speed and the vessel B is placed on the platform. In the frame of an observer standing on the plateform, select the correct statement
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physics-
Two rods of same length and cross-sectional area are joined in series. Thermal conductivity of the rods are in ratio of 2 : 1.
The ends are maintained at temperatures 
as shown with 
and sides are thermally insulated.
Which of the following graph represents temperature gradient (dT/dx) against x in steady state
Two rods of same length and cross-sectional area are joined in series. Thermal conductivity of the rods are in ratio of 2 : 1.
The ends are maintained at temperatures as shown with and sides are thermally insulated.
Which of the following graph represents temperature gradient (dT/dx) against x in steady state
physics-General
physics-
Select the correct statement on the basis of the given graph :
Select the correct statement on the basis of the given graph :
physics-General
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The load versus strain graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line
The load versus strain graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line
physics-General
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The distribution of relative intensity I(
) of blackbody radiation from a solid body versus the wavelength is shown in the figure. If the Wien displacement law constant is 2.9 × 10-3 mK, what is the approximate temperature of the object?
The distribution of relative intensity I() of blackbody radiation from a solid body versus the wavelength is shown in the figure. If the Wien displacement law constant is 2.9 × 10-3 mK, what is the approximate temperature of the object?
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If the surface temperature of the sun and its mass were to remain constant and its radius were to increase by a factor of 2, the equilibrium temperature of a planet (Tp) would
If the surface temperature of the sun and its mass were to remain constant and its radius were to increase by a factor of 2, the equilibrium temperature of a planet (Tp) would
Physics-General
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Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures 200°C and 0°C respectively.
If x has the value calculated in above question. Then temperature of junction b or d is:
Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures 200°C and 0°C respectively.
If x has the value calculated in above question. Then temperature of junction b or d is:
physics-General
physics-
A mass on the end of a spring oscillates with the displacement versus time graph shown to the right. Which of the following statements about its motion is CORRECT?
A mass on the end of a spring oscillates with the displacement versus time graph shown to the right. Which of the following statements about its motion is CORRECT?
physics-General
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A wire having cross-sectional area S is attached to wall on one side and a block of mass M on the other side which placed on a horizontal surface having coefficient of friction mas shown. Material of wire has coefficient of thermal expansion 
and Young's modulus Y. At initial temperature there is no stress in the wire. Now the wire is cooled. At what decrease in temperature the block will begin to move.
A wire having cross-sectional area S is attached to wall on one side and a block of mass M on the other side which placed on a horizontal surface having coefficient of friction mas shown. Material of wire has coefficient of thermal expansion and Young's modulus Y. At initial temperature there is no stress in the wire. Now the wire is cooled. At what decrease in temperature the block will begin to move.
Physics-General
