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SSC JE 2017: Electromagnetic Theory Rankers Quiz 4
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Question 1
Electron-volt is the unit of
Question 2
The main advantage of temporary magnets is that we can
Question 3
A current of 5 mA flows in a resistance less choke from a 200 V alternating source. The energy consumed in the choke is
Question 4
A coil with a certain number of turns has a specified time constant. If the number of turns is doubled, its time constant would
Question 5
The small pockets of air in the high voltage cable provide ____ relative permittivity, ____ electric field and at these sites breakdown is likely to be initiated.
Question 6
The emf induced in a coil is given by
e = -N
where e is the emf induced, N is the number of turns and dϕ is the instantaneous flux linkage with the coil in time dt.
The negative sign in the expression is due to
e = -N
where e is the emf induced, N is the number of turns and dϕ is the instantaneous flux linkage with the coil in time dt.
The negative sign in the expression is due to
Question 7
The variation of |B| with distance r from a very long straight conductor carrying a current I is correctly represented by
Question 8
As a result of reflections from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater then the velocity of light in space. This is called
Question 9
The depth of penetration of a wave in a lossy dielectric increases with deccreasing
Question 10
The capacitance of a concentric spherical capacitor of shell radii x and y (x × y) is
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Nov 18ESE & GATE EE
