In a series LCR circuit, the voltage across the resistance, capacitance and inductance is 10 V each. If the capacitance is short circuited the voltage across the inductance will be
140 V
10 V
10/ V
20 V
If vy , vx and vm are the speeds of gamma rays, X-rays and microwaves respectively in vacuum, then
vy > vx > vm
vy < vx < vm
vy > vx > vm
vy = vx = vm
D.
vy = vx = vm
Increasing the order of frequencies of the spectrum is given by
Radio waves < micro-wave < visible rays < ultraviolet rays < X-rays < gamma rays < cosmic rays
And
The order of the wavelength of spectrum is given by
Radio waves > micro wave > infrared wave > visible rays > ultraviolet rays > x-rays > gamma rays > cosmic rays
but
speed of each radiation equals 3 × 108 m/s
Because all the radiations are component of electromagnetic waves and speed of the electromagnetic wave is 3 × 108 m/s
Hence
Vg = Vx = Vm = 3 × 108 m/s
Assertion: Electric potential of earth is taken zero.
Reason: No electric field exists on earth surface.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: A charge, whether stationary or in motion produces a magnetic field around it.
Reason: Moving charges produce only electric field in the surrounding space.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: Magnetic susceptibillity is a pure number.
Reason: The value of magnetic susceptibility for vacuum is one.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Assertion: Transformers are used only in alternating current source not in direct current.
Reason: Only a.c. can be stepped up or down
by means of transformers.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion: The dimensional formula for product of resistance and conductance is same as for dielectric constant.
Reason: Both have dimension of time costant.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
A convex lens of refractive index has a power of 2.5 D in a liquid of refractive index 2, then the new power of the lens is
1.25 D
1.5 D
1.25 D
1.5 D
When the inputs of a two input logic gate are 0 and 0, the output is 1. When the inputs are 1 and 0, the output is zero. The type of logic gate is
XOR
NAND
NOR
OR