Which one of the following common devices works on the basis of the principle of mutual induction?
(A) Tubelight
(B) Transformer
(C) Photodiode
(D) LED
Maxwell is unit of
(A) Intensity of magnetization
(B) Permeability
(C) Magnetic flux
(D) Magnetic susceptibility
When resistors are connected in series, then net resistance____.
(A) Increases
(B) Decreases
(C) Remains same
(D) None of these
In case of negative work the angle between the force and displacement is-
(A) 0°
(B) 45°
(C) 90°
(D) 180°
The sum of the change in kinetic and potential energy is always-
(A) Zero
(B) Positive
(C) Negative
(D) None of the above
When a heated electric bulb glows -
(A) Electrical energy is completely converted into light.
(B) Electrical energy is partly converted into light energy and partly into heat energy
(C) Light energy is converted into electrical energy.
(D) Electric energy is converted into magnetic energy .
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