The relation between Ip and Vp for a triode is 
, Keeping the grid potential constant at 1V, the value of rp will be
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(a) 8 kW |
(b) 4 kW |
(c) 2 kW |
(d) 8 kW |
(d) 8 kW
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Which of the following diagrams, shows correctly the dispersion of white light by a prism
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(a)
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(b)
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(c)
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(d)
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Assertion : An ac generator is based on the phenomenon of self-induction.
Reason : In single coil, we consider self-induction only.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If assertion is false but reason is true. |
An electric dipole is kept in non-uniform electric field. It experiences
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(a) A force and a torque |
(b) A force but not a torque |
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(c) A torque but not a force |
(d) Neither a force nor a torque |
The relation among u, v and f for a mirror is:
An object is immersed in a fluid. In order that the object becomes invisible, it should
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(a) Behave as a perfect reflector |
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(b) Absorb all light falling on it |
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(c) Have refractive index one |
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(d) Have refractive index exactly matching with that of the surrounding fluid |
